Publications de l'équipe Traitement des eaux et déchets
2024
Heni Dallagi, Nassim Ait-Mouheb, Audrey Soric, Olivier Boiron. Simulation of the flow characteristics of a labyrinth milli-channel used in drip irrigation. Biosystems Engineering, 2024, 239, pp.114-129. ⟨10.1016/j.biosystemseng.2024.02.004⟩. ⟨hal-04479285⟩ Plus de détails...
Water scarcity is a global concern, with irrigation of food crops contributing significantly to freshwater depletion. Drip irrigation technology reduces water consumption but faces issues like clogging in narrow discharge sections, diminishing efficiency, and increasing costs. Accurate prediction of flow characteristics and understanding pa- rameters affecting biofilm growth and particle deposition is crucial for effective anti-clogging strategies. Computational fluid dynamics (CFD) using turbulence models can be a valuable tool. This study evaluated the accuracy and efficiency of different turbulence models (standard k-ε, Reynolds Stress Model, and Large Eddy Simulation) in predicting the flow characteristics of a commercial emitter in a drip irrigation system. Results showed the standard k-ε model as a preferred choice for simulating mean flow characteristics and emitter discharge due to its balance between accuracy and computational efficiency. However, the Large Eddy Simu- lation model provided the most accurate results, considering the emitter discharge, unsteady flow behavior, wall shear stress distribution, and oscillatory index, despite requiring more computational resources. This model is valuable for understanding hydrodynamic effects on emitter clogging. The study also investigated the impact of velocity fluctuations, wall shear stress, and oscillatory shear index on biofilm growth and deposition in the emitter. Low shear stress in inlet and return zones reduced self-cleaning ability, leading to particle and micro- organism attachment. Maintaining appropriate wall shear stress values in other regions proved crucial for improving anti-clogging ability. High oscillatory shear index values enhanced mass transfer, nutrient mixing, diffusion within the biofilm, and self-cleaning capacity. In summary, this study greatly enhances our under- standing of how flow dynamics and biofilm management impact drip irrigation systems. It provides practical insights for engineers and practitioners, aiding in the creation of more efficient and clog-resistant systems. By optimizing these dynamics and strategies, this research promotes sustainable water use in agriculture, while also minimizing maintenance costs and maximizing crop yields.
Heni Dallagi, Nassim Ait-Mouheb, Audrey Soric, Olivier Boiron. Simulation of the flow characteristics of a labyrinth milli-channel used in drip irrigation. Biosystems Engineering, 2024, 239, pp.114-129. ⟨10.1016/j.biosystemseng.2024.02.004⟩. ⟨hal-04479285⟩
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04202142⟩ Plus de détails...
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04202142⟩
Gautier Hypolite, Olivier Boutin, Sandrine Del Sole, Jean-François Cloarec, Jean-Henry Ferrasse. Evaluation of a water network’s energy potential in dynamic operation. Energy, 2023, 271, pp.127066. ⟨10.1016/j.energy.2023.127066⟩. ⟨hal-04504325⟩ Plus de détails...
To address the challenges of the energy transition, reducing consumption and optimizing energy production is crucial for all industrial sectors. In the future, water issues will be as important as energy issues, making the optimization of water supply systems critical. The water sector represents large energy consumption for pumping and heating. In regards to this consumption, water systems have a great potential for energy recovery through hydroelectric production or thermal energy recovery. This article aims to quantify the energy potential of water supply systems, which has not been well understood until now. The energy potential of these systems encompasses hydropower recovery and thermal potential, including heat recovery and cold recovery. For that, a method is developed to estimate this potential, including the recoverable power, its location, and its temporal variation. The method can be used for hydroelectricity production, as well as for heat and cold recovery. For a whole year, the results indicate a hydraulic potential of 15 MWh.km−1.year−1, and respectively 1650 MWh.km−1 .year−1 for heat recovery and 766 MWh.km−1.year−1 for cold recovery.
Gautier Hypolite, Olivier Boutin, Sandrine Del Sole, Jean-François Cloarec, Jean-Henry Ferrasse. Evaluation of a water network’s energy potential in dynamic operation. Energy, 2023, 271, pp.127066. ⟨10.1016/j.energy.2023.127066⟩. ⟨hal-04504325⟩
Tetyana Kyrpel, Vita Saska, Anne de Poulpiquet, Mathieu Luglia, Audrey Soric, et al.. Hydrogenase-based electrode for hydrogen sensing in a fermentation bioreactor. Biosensors and Bioelectronics, 2023, 225, pp.115106. ⟨10.1016/j.bios.2023.115106⟩. ⟨hal-03963086⟩ Plus de détails...
The hydrogen-based economy will require not only sustainable hydrogen production but also sensitive and cheap hydrogen sensors. Commercially available H2 sensors are limited by either use of noble metals or elevated temperatures. In nature, hydrogenase enzymes present high affinity and selectivity for hydrogen, while being able to operate in mild conditions. This study aims at evaluating the performance of an electrochemical sensor based on carbon nanomaterials with immobilised hydrogenase from the hyperthermophilic bacterium Aquifex aeolicus for H2 detection. The effect of various parameters, including the surface chemistry, dispersion degree and amount of deposited carbon nanotubes, enzyme concentration, temperature and pH on the H2 oxidation are investigated. Although the highest catalytic response is obtained at a temperature around 60 °C, a noticeable current can be obtained at room temperature with a low amount of protein less than 1 µM. An original pulse-strategy to ensure H2 diffusion to the bioelectrode allows to reach H2 sensitivity of 4 µA cm-2 per % H2 and a linear range between 1-20 %. Sustainable hydrogen was then produced through dark fermentation performed by a synthetic bacterial consortium in an up-flow anaerobic packed-bed bioreactor. Thanks to the outstanding properties of the A. aeolicus hydrogenase, the biosensor was demonstrated to be quite insensitive to CO2 and H2S produced as the main co-products of the bioreactor. Finally, the bioelectrode was used for the in situ measurement of H2 produced in the bioreactor in steady-state.
Tetyana Kyrpel, Vita Saska, Anne de Poulpiquet, Mathieu Luglia, Audrey Soric, et al.. Hydrogenase-based electrode for hydrogen sensing in a fermentation bioreactor. Biosensors and Bioelectronics, 2023, 225, pp.115106. ⟨10.1016/j.bios.2023.115106⟩. ⟨hal-03963086⟩
Kelly Ohanessian, Cristian Barca, Audrey Soric, Jean-Henry Ferrasse, Olivier Boutin. Simulation of Alternative Process Schemes for Hydrofluoric and Phosphoric Acid Stream Treatment and Nutrient Recovery. Process Integration and Optimization for Sustainability, 2023, 7 (4), pp.831-845. ⟨10.1007/s41660-023-00326-x⟩. ⟨hal-04504375⟩ Plus de détails...
Hydrofluoric and phosphoric acid streams produced by the microelectronic industry usually present high flow and high contents of phosphorus, nitrogen, fluorine, and organic carbon. This study aims at evaluating the efficiency and suitability of alternative process schemes for the treatment and valorization of hydrofluoric and phosphoric acid streams. A comparative approach is proposed, based on the simulation of different process schemes, each involving several steps of physicochemical and biological treatments. The main objectives are to compare (i) the treatment efficiency, (ii) the consumption of chemical reagents, and (iii) the recovery of high-value by-products (e.g. calcium fluoride, struvite, and hydroxyapatite), and hence to identify the most suitable process scheme. Furthermore, this study contributes to the development of chemical precipitation and bioconversion models that can be applied for further simulation studies on wastewater treatment processes. The results indicate that the use of calcium hydroxide (Ca(OH2)) as the only source of Ca2+ and OH− ions for the precipitation steps is a promising way to reduce the total consumption of chemical reagents while recovering high purity (> 98%) calcium fluoride and struvite. Moreover, the use of a membrane aerated biofilm reactor after the precipitation steps may further decrease organic carbon and nitrogen contents below 125 g COD.m−3 and 30 g N.m−3, thus allowing effluent discharge to natural waters. Overall, this study gives useful information for the development of innovative treatment processes, and it provides crucial data for the selection of the most promising alternative schemes.
Kelly Ohanessian, Cristian Barca, Audrey Soric, Jean-Henry Ferrasse, Olivier Boutin. Simulation of Alternative Process Schemes for Hydrofluoric and Phosphoric Acid Stream Treatment and Nutrient Recovery. Process Integration and Optimization for Sustainability, 2023, 7 (4), pp.831-845. ⟨10.1007/s41660-023-00326-x⟩. ⟨hal-04504375⟩
Journal: Process Integration and Optimization for Sustainability
Antonello Tangredi, Cristian Barca, Jean-Henry Ferrasse, Olivier Boutin. Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review. Chemical Engineering Journal, 2023, 463, pp.142342. ⟨10.1016/j.cej.2023.142342⟩. ⟨hal-04303018⟩ Plus de détails...
Sewage sludge represents a renewable source of organic carbon and nutrients such as nitrogen (N), potassium (K), and phosphorus (P) that can be valorised through the recovery of energy carriers (e.g. biofuels) and fertilizers (N, K, and P precipitates). This review analyses>60 recent studies that have investigated P recovery potential from sewage sludge by hydrothermal processes. The effect of process parameters such as temperature, residence time, pressure, solid-to-liquid ratio, and addition of additives on P conversion pathways has been investigated by a critical discussion of the results published in the literature. Results show that temperature is the most influential parameter for P speciation and repartition: the increase in temperature appears to promote the increase in solid P recovery yield, the mineralization of organic P, and the conversion of non-apatitic P into apatitic P. The increase in reaction time has similar effects as temperature, but to a lesser extent. Solid P recovery yield and apatitic P fraction can be enhanced by increasing the medium alkalinity and by adding Ca-containing reactants. Non-apatitic P fraction can be increased by lower medium alkalinity, and by the addition of Fe-and Alcontaining reactants. The results of this review provide to researchers and practitioners in the field of sewage sludge management key elements for the best operation of hydrothermal reactors to improve the recovery of P and biofuels. Finally, some new research perspectives and technical challenges are proposed to improve the knowledge and the scaling up of the technology.
Antonello Tangredi, Cristian Barca, Jean-Henry Ferrasse, Olivier Boutin. Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review. Chemical Engineering Journal, 2023, 463, pp.142342. ⟨10.1016/j.cej.2023.142342⟩. ⟨hal-04303018⟩
Shumet Sharew, Ludovic Montastruc, Abubeker Yimam, Stéphane Negny, Jean-Henry Ferrasse. Alternative Energy Potential and Conversion Efficiency of Biomass into Target Biofuels: A Case Study in Ethiopian Sugar Industry- Wonji-Shoa. Biomass, 2022, 2 (4), pp.279-298. ⟨10.3390/biomass2040019⟩. ⟨hal-03936793⟩ Plus de détails...
Global energy security relies on fossil-based resources that are affiliated with the source of global warming, apart from punches of political and economic instabilities. Biomass is a promising alternative carbonaceous feedstock used for the production of clean energy that could have the potential to substitute for fossil fuels. This study aims to present a conceptual design that considers the criteria to identify the upper theoretical limits of biomass conversion, thus providing the potential approach to the conversion of three biomass (by-products: dry molasses, dry bagasse, and dry filter cake) through gasification, in order to contribute the biomass carbon-capturing by the model assessment of stoichiometric mass conversion and energy efficiency indicators into simple thermodynamic energy vectors, such as alcohols, alkanes, and syngas (a mixture of carbon monoxide and hydrogen). Modeling plays up the importance of stoichiometric efficiency of biomass conversion with the supply of oxygen and hydrogen. This realizes that the multi-product diversification of feedstock into syngas, hydrocarbons, and alcohol through integrated process schemes could have the potential to fill the energy gap and help to manage environmental load. In regard to biomass conversion results, the mass conversion and energy conversion efficiencies of dry bagasse have better conversion potential than molasses and F. cake (% mass conversion = 129 in syngas, 54.4 in alkane, and 43.4 in alcohol; % energy conversion = 94.3 in syngas and 93.3 in alkane and alcohol).
Shumet Sharew, Ludovic Montastruc, Abubeker Yimam, Stéphane Negny, Jean-Henry Ferrasse. Alternative Energy Potential and Conversion Efficiency of Biomass into Target Biofuels: A Case Study in Ethiopian Sugar Industry- Wonji-Shoa. Biomass, 2022, 2 (4), pp.279-298. ⟨10.3390/biomass2040019⟩. ⟨hal-03936793⟩
Cristian Barca, Matteo Magari, Hélène Miche, Pierre Hennebert. Effect of different wastewater composition on kinetics, capacities, and mechanisms of phosphorus sorption by carbonated bauxite residue. Journal of Environmental Chemical Engineering, 2022, 10 (6), pp.108922. ⟨10.1016/j.jece.2022.108922⟩. ⟨hal-03884024⟩ Plus de détails...
This study aims at evaluating the effect of different wastewater composition on kinetics, capacities, and mechanisms of P sorption by carbonated bauxite residues (CBR). A series of batch experiments was performed to investigate P sorption behaviors from solutions prepared with different aqueous matrices (deionized water, tap water, and real wastewater) and different initial P concentrations (from 10 to 200 mg P/L). Also, a series of sequential P extractions was performed to investigate P fractionation of CBR before and after its use in P sorption experiments, and hence to elucidate the main P removal mechanisms. The results indicate that initial P concentration is the most influential parameter controlling kinetics, capacities, and mechanisms of P removal in batch experiments. Kinetic constant of P sorption increases exponentially with decreasing initial P concentration below 100 mg P/L, thus indicating a faster achievement of P sorption equilibrium. Equilibrium P sorption capacities increase linearly from about 0.2 to about 3.9 mg P/g CBR with increasing initial P concentration from 10 to 200 mg P/L, thus indicating that P saturation of CBR was not reached. Ca phosphate precipitation is the main P removal mechanism at higher initial P concentrations (> 10 mg P/L), whereas phosphate adsorption on CBR surface becomes more relevant over the total amount of P removed at lower initial P concentrations. Overall, the findings of this study allow to evaluate kinetic constants, sorption capacities, and removal mechanisms under different operating scenarios, thus providing crucial information for the design and operation of P treatment units.
Cristian Barca, Matteo Magari, Hélène Miche, Pierre Hennebert. Effect of different wastewater composition on kinetics, capacities, and mechanisms of phosphorus sorption by carbonated bauxite residue. Journal of Environmental Chemical Engineering, 2022, 10 (6), pp.108922. ⟨10.1016/j.jece.2022.108922⟩. ⟨hal-03884024⟩
Journal: Journal of Environmental Chemical Engineering
Jean-Henry Ferrasse, Nandeeta Neerunjun, Hubert Stahn. Intermittency and electricity retailing: An incomplete market approach. Mathematical Social Sciences, 2022, 120, pp.24-36. ⟨10.1016/j.mathsocsci.2022.09.001⟩. ⟨hal-03979827⟩ Plus de détails...
We analyze the integration of intermittent renewables-based technologies into an electricity mix comprising of conventional energy. Intermittency is modeled by a contingent electricity market and we introduce demand-side flexibility through the retailing structure. Retailers propose diversified electricity contracts at different prices, but in an insufficient number to cover intermittent production. These delivery contracts are modeled similarly to numeraire assets. We study the competitive equilibrium of the state-contingent wholesale electricity markets and the delivery contract markets. We also provide an analysis linking the delivery contracts to social welfare. Finally, we discuss the conditions under which changing the delivery contracts improve penetration of renewables and increases welfare. These provide useful insights for managing intermittency and achieving renewable capacity objectives.
Jean-Henry Ferrasse, Nandeeta Neerunjun, Hubert Stahn. Intermittency and electricity retailing: An incomplete market approach. Mathematical Social Sciences, 2022, 120, pp.24-36. ⟨10.1016/j.mathsocsci.2022.09.001⟩. ⟨hal-03979827⟩
Jean-Henry Ferrasse, Nandeeta Neerunjun, Hubert Stahn. Intermittency and electricity retailing: An incomplete market approach. Mathematical Social Sciences, 2022, 120, pp.24-36. ⟨10.1016/j.mathsocsci.2022.09.001⟩. ⟨hal-03979827⟩ Plus de détails...
We analyze the integration of intermittent renewables-based technologies into an electricity mix comprising of conventional energy. Intermittency is modeled by a contingent electricity market and we introduce demand-side flexibility through the retailing structure. Retailers propose diversified electricity contracts at different prices, but in an insufficient number to cover intermittent production. These delivery contracts are modeled similarly to numeraire assets. We study the competitive equilibrium of the state-contingent wholesale electricity markets and the delivery contract markets. We also provide an analysis linking the delivery contracts to social welfare. Finally, we discuss the conditions under which changing the delivery contracts improve penetration of renewables and increases welfare. These provide useful insights for managing intermittency and achieving renewable capacity objectives.
Jean-Henry Ferrasse, Nandeeta Neerunjun, Hubert Stahn. Intermittency and electricity retailing: An incomplete market approach. Mathematical Social Sciences, 2022, 120, pp.24-36. ⟨10.1016/j.mathsocsci.2022.09.001⟩. ⟨hal-03979827⟩
We analyze the integration of intermittent renewables-based technologies into an electricity mix comprising of conventional energy. Intermittency is modeled by a contingent electricity market and we introduce demand-side flexibility through the retailing structure. Retailers propose diversified electricity contracts at different prices, but in an insufficient number to cover intermittent production. These delivery contracts are modeled similarly to numeraire assets. We study the competitive equilibrium of the state-contingent wholesale electricity markets and the delivery contract markets. We also provide an analysis linking the delivery contracts to social welfare. Finally, we discuss the conditions under which changing the delivery contracts improve penetration of renewables and increases welfare. These provide useful insights for managing intermittency and achieving renewable capacity objectives.
Jean-Henry Ferrasse, Nandeeta Neerunjun, Hubert Stahn. Intermittency and electricity retailing: An incomplete market approach ✩. Mathematical Social Sciences, 2022, 120, pp.24-36. ⟨10.1016/j.mathsocsci.2022.09.001⟩. ⟨hal-04063845⟩
Valentina Segneri, Jean Henry Ferrasse, Antonio Trinca, Giorgio Vilardi. An Overview of Waste Gasification and Syngas Upgrading Processes. Energies, 2022, 15 (17), pp.6391. ⟨10.3390/en15176391⟩. ⟨hal-03936798v2⟩ Plus de détails...
The increasing attention towards climate change and greenhouse gas emissions makes the exploitation of renewable energy sources one of the key pathways for sustainable power generation or chemical production [...]
Valentina Segneri, Jean Henry Ferrasse, Antonio Trinca, Giorgio Vilardi. An Overview of Waste Gasification and Syngas Upgrading Processes. Energies, 2022, 15 (17), pp.6391. ⟨10.3390/en15176391⟩. ⟨hal-03936798v2⟩
Valentina Segneri, Jean Henry Ferrasse, Antonio Trinca, Giorgio Vilardi. An Overview of Waste Gasification and Syngas Upgrading Processes. Energies, 2022, 15 (17), pp.6391. ⟨10.3390/en15176391⟩. ⟨hal-03936798v1⟩ Plus de détails...
The increasing attention towards climate change and greenhouse gas emissions makes the exploitation of renewable energy sources one of the key pathways for sustainable power generation or chemical production [...]
Valentina Segneri, Jean Henry Ferrasse, Antonio Trinca, Giorgio Vilardi. An Overview of Waste Gasification and Syngas Upgrading Processes. Energies, 2022, 15 (17), pp.6391. ⟨10.3390/en15176391⟩. ⟨hal-03936798v1⟩
Emilie Gout, Mathias Monnot, Olivier Boutin, Pierre Vanloot, Magalie Claeys-Bruno, et al.. Assessment and optimization of wet air oxidation for treatment of landfill leachate concentrated with reverse osmosis. Process Safety and Environmental Protection, 2022, 162, pp.765-774. ⟨10.1016/j.psep.2022.04.046⟩. ⟨hal-04063869⟩ Plus de détails...
Sanitary landfilling is one of the most common ways to eliminate solid municipal/urban wastes. Despite many advantages, this method leads to the generation of contaminated leachates that remains an unavoidable consequence of the waste disposal. Membrane technologies, such as reverse osmosis, are frequently used for leachate treatment as they generate good quality permeate with a high recovery rate. However, their primary drawbacks are fouling, eliminated by chemical wash, and the production of highly polluted concentrates. This paper aims to assess and optimize the use of wet air oxidation to treat reverse osmosis concentrates in terms of bio-refractory organic pollutants removal. Wet air oxidation was performed at elevated pressure and temperature using experimental design methodology with a 70% oxygen excess for 6 h in a stirred batch reactor. The effect of operating conditions was investigated with an experimental design where 3 factors (two quantitative ones: pressure and temperature and a qualitative one: seasonality of the effluent) have been considered. The chemical oxygen demand and the total organic carbon removals increased with the increase of temperature (from 200 °C to 300 °C) and no effect of the pressure was observed within the range 18-21 MPa. Wet air oxidation could achieve up to 99% removals for chemical oxygen demand and total organic carbon for the seasonality of October. Experiments also showed that increasing the initial pollutant concentration increased initial kinetic rates. Finally, models were established to calculate and predict pollution removal rate and its kinetic, in the domain of study.
Emilie Gout, Mathias Monnot, Olivier Boutin, Pierre Vanloot, Magalie Claeys-Bruno, et al.. Assessment and optimization of wet air oxidation for treatment of landfill leachate concentrated with reverse osmosis. Process Safety and Environmental Protection, 2022, 162, pp.765-774. ⟨10.1016/j.psep.2022.04.046⟩. ⟨hal-04063869⟩
Journal: Process Safety and Environmental Protection
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Characterization of polyurea microcapsules synthesized with an isocyanate of low toxicity and eco-friendly esters via microfluidics: Shape, shell thickness, morphology and encapsulation efficiency. Chemical Engineering Research and Design, 2022, 182, pp.256-272. ⟨10.1016/j.cherd.2022.03.026⟩. ⟨hal-04063865⟩ Plus de détails...
There are some studies on the synthesis of polyurea microcapsules. However, there is hardly a case where both green solvents and non-toxic isocyanates are used, especially in microfluidics. In this work, an environmentally friendly chemical system of interfacial polymerization (isocyanate: HDB-LV; solvent: octyl salicylate or dibutyl adipate) is tested for the first time to produce polyurea microcapsules. The size of microcapsules is calibrated at 78 μm by microfluidics to quantitatively analyze the relationships among shell thickness, encapsulation efficiency and isocyanate concentrations. The influences of solvent types and reactant concentrations on the shape, morphology and shell thickness of microcapsules are studied. Esters with low water miscibility and low amine concentrations (lower reaction rate) are crucial for the formation of spherical microcapsules. An ester with high water miscibility can diffuse into the continuous phase during encapsulation, which results in broken microcapsules. A high concentration of amine can probably cause cross-linking not only at the interface but also inside the droplet template, which leads to microcapsule deformation. A linear relationship is observed between the shell thickness of microcapsules and the isocyanate concentration. Overall, a high encapsulation efficiency (more than 90%) for octyl salicylate is achieved with polyurea microcapsules.
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Characterization of polyurea microcapsules synthesized with an isocyanate of low toxicity and eco-friendly esters via microfluidics: Shape, shell thickness, morphology and encapsulation efficiency. Chemical Engineering Research and Design, 2022, 182, pp.256-272. ⟨10.1016/j.cherd.2022.03.026⟩. ⟨hal-04063865⟩
Cristian Barca, Matteo Magari, Hélène Miche, Pierre Hennebert. Effect of different wastewater composition on kinetics, capacities, and mechanisms of phosphorus sorption by carbonated bauxite residue. Journal of Environmental Chemical Engineering, 2022, 10 (6), pp.108922. ⟨10.1016/j.jece.2022.108922⟩. ⟨hal-04063830⟩ Plus de détails...
This study aims at evaluating the effect of different wastewater composition on kinetics, capacities, and mechanisms of P sorption by carbonated bauxite residues (CBR). A series of batch experiments was performed to investigate P sorption behaviors from solutions prepared with different aqueous matrices (deionized water, tap water, and real wastewater) and different initial P concentrations (from 10 to 200 mg P/L). Also, a series of sequential P extractions was performed to investigate P fractionation of CBR before and after its use in P sorption experiments, and hence to elucidate the main P removal mechanisms. The results indicate that initial P concentration is the most influential parameter controlling kinetics, capacities, and mechanisms of P removal in batch experiments. Kinetic constant of P sorption increases exponentially with decreasing initial P concentration below 100 mg P/L, thus indicating a faster achievement of P sorption equilibrium. Equilibrium P sorption capacities increase linearly from about 0.2 to about 3.9 mg P/g CBR with increasing initial P concentration from 10 to 200 mg P/L, thus indicating that P saturation of CBR was not reached. Ca phosphate precipitation is the main P removal mechanism at higher initial P concentrations (> 10 mg P/L), whereas phosphate adsorption on CBR surface becomes more relevant over the total amount of P removed at lower initial P concentrations. Overall, the findings of this study allow to evaluate kinetic constants, sorption capacities, and removal mechanisms under different operating scenarios, thus providing crucial information for the design and operation of P treatment units.
Cristian Barca, Matteo Magari, Hélène Miche, Pierre Hennebert. Effect of different wastewater composition on kinetics, capacities, and mechanisms of phosphorus sorption by carbonated bauxite residue. Journal of Environmental Chemical Engineering, 2022, 10 (6), pp.108922. ⟨10.1016/j.jece.2022.108922⟩. ⟨hal-04063830⟩
Journal: Journal of Environmental Chemical Engineering
Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03597451⟩ Plus de détails...
The well-known Villermaux-Dushman system is nowadays widely used for examining the micromixing efficiency either in batch or continuous intensified reactors. However, a bibliographic review shows that kinetic data are too scattered for a reliable determination of the micromixing times. The Dushman reaction kinetics is then reexamined with the use of sulfuric and perchloric acids. The results confirm the fifth-order rate law. More precisely, the I-, H+, and IO3- dependence orders on the rate law are, respectively, 2, 2, and 1, under any condition. To be more consistent with the reactant concentrations used in the Villermaux-Dushman test, we extend their studied range, namely, 1.6 x 10(-3) M <= [I-](0) <= 1.6 x 10(-2) M, 1.2 x 10(-4) M <= [H+](0) <= 1.57 x 10(-2) M, and 4 x 10(-5) M <= [IO3-] <= 2.1 X 10(-4) M. The ionic strength varies up to 2 M. The experimental results show that the rate constant is still ionic-strength-dependent. The results obtained with sulfuric and perchloric acids are found to be consistent and in relatively good agreement at small ionic strengths (mu < 0.1 M) only. At a higher ionic strength, the use of sulfuric acid requires sustained attention to the constant of the second dissociation equilibrium. The nonideal solution behavior raising at a high ionic strength makes its estimation deeply sensitive.
Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03597451⟩
Journal: Industrial and engineering chemistry research
Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03514628⟩ Plus de détails...
The well-known Villermaux-Dushman system is nowadays widely used for examining the micromixing efficiency either in batch or continuous intensified reactors. However, a bibliographic review shows that kinetic data are too scattered for a reliable determination of the micromixing times. The Dushman reaction kinetics is then reexamined with the use of sulfuric and perchloric acids. The results confirm the fifth-order rate law. More precisely, the I-, H+, and IO3- dependence orders on the rate law are, respectively, 2, 2, and 1, under any condition. To be more consistent with the reactant concentrations used in the Villermaux-Dushman test, we extend their studied range, namely, 1.6 x 10(-3) M <= [I-](0) <= 1.6 x 10(-2) M, 1.2 x 10(-4) M <= [H+](0) <= 1.57 x 10(-2) M, and 4 x 10(-5) M <= [IO3-] <= 2.1 X 10(-4) M. The ionic strength varies up to 2 M. The experimental results show that the rate constant is still ionic-strength-dependent. The results obtained with sulfuric and perchloric acids are found to be consistent and in relatively good agreement at small ionic strengths (mu < 0.1 M) only. At a higher ionic strength, the use of sulfuric acid requires sustained attention to the constant of the second dissociation equilibrium. The nonideal solution behavior raising at a high ionic strength makes its estimation deeply sensitive.
Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03514628⟩
Journal: Industrial and engineering chemistry research
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. Application of Moving Bed Biofilm Reactor and Fixed Bed Hybrid Biological Reactor for Oilfield Produced Water Treatment: Influence of Total Dissolved Solids Concentration. Energies, 2021, 14 (21), pp.7297. ⟨10.3390/en14217297⟩. ⟨hal-03413732⟩ Plus de détails...
This experimental paper deals with the development of a hybrid biological reactor for the treatment of a synthetic oilfield produced water under an increase in total dissolved solids (TDS) concentration. To comply with strengthening regulations concerning produced water discharge and peculiar produced water compositions, a moving bed biofilm reactor (MBBR) consisting in a combination of free activated sludge and moving biofilm supports was compared to a fixed bed hybrid biological reactor (FBHBR) consisting in a combination of free activated sludge and a fixed biofilm support. After a 216 days experimental period, the MBBR and the FBHBR were efficient to treat a synthetic produced water with chemical oxygen demand (COD) removal rate above 90% under an increase in TDS concentrations from 1.5 to 8 g·L−1. Ecotoxicity measurements on freshwater and marine microorganisms revealed an absence of toxicity on treated waters. A decrease in bacterial diversity indices with respect to the inoculum was observed in both bioreactors. This suggests that the increase in TDS concentrations caused the predominance of a low number of bacterial species.
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. Application of Moving Bed Biofilm Reactor and Fixed Bed Hybrid Biological Reactor for Oilfield Produced Water Treatment: Influence of Total Dissolved Solids Concentration. Energies, 2021, 14 (21), pp.7297. ⟨10.3390/en14217297⟩. ⟨hal-03413732⟩
Francisco Mendez-Alva, Hélène Cervo, Gorazd Krese, Greet van Eetvelde. Industrial symbiosis profiles in energy-intensive industries: Sectoral insights from open databases. Journal of Cleaner Production, 2021, 314, pp.128031. ⟨10.1016/j.jclepro.2021.128031⟩. ⟨hal-03597672⟩ Plus de détails...
Process industries are the foundation of the European economy, transforming raw materials into building blocks for strategic products and applications in today's society. Such industries range from steel, cement, or minerals to chemicals such as lubricants for wind turbines and polymers that prevent waste in logistic supply chains. The downside of this foundation industry is its high environmental impact regarding emissions, and intensive use of energy and resources. One of the key strategies to address such challenges is industrial symbiosis: various industries establish collective efforts to find value while transitioning to a more circular economy. This paper presents an exploratory analysis of databases on IS case studies. We used the European standard classification for economic activities (NACE) to draw industrial sector profiles for the most relevant energy-intensive industries: chemicals, steel, and cement, coupled with urban synergies. The majority of the synergies includes the chemicals sector with most commonly shared streams being energy, water, and carbon dioxide. IS cases are ranked in terms of frequency, then classified in topical groups and finally, the sustainability impact of the different categories is discussed. The outcome is a methodology to frame and assess industrial symbiosis case collections useful for future exploring and exploiting circularity projects in public and private organisations.
Francisco Mendez-Alva, Hélène Cervo, Gorazd Krese, Greet van Eetvelde. Industrial symbiosis profiles in energy-intensive industries: Sectoral insights from open databases. Journal of Cleaner Production, 2021, 314, pp.128031. ⟨10.1016/j.jclepro.2021.128031⟩. ⟨hal-03597672⟩
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03597512⟩ Plus de détails...
Thermal energy counts for a large part of the total energy consumption. To reduce fossil fuel consumption for heat and cold generation, different low temperature heat sources have been considered. Water networks have been considered as a large amount of water flow through it. To measure the thermal potential of the system, this paper provides a method in unsteady state to determine water temperature and flow in large water systems made of buried pipes. The model has been applied to a raw water supply system made up of 5000 km of piping and carrying 200 million m3 annually situated in the south of France. Water temperature is calculated considering heat exchange and the spatial specificities of the network (diameter of the pipes, depth, type of soil ...). Soil and water temperature measurements have been made to validate the model values. The model can predict water flow and temperature according to time with good accuracy: maximal error of 10% on the flow is obtained, the root mean square error on the calculated temperature is 0.84 circle C, and the correlation coefficient between the calculated and the measured temperature values is 0.98. The impact of adding several heat (or cold) injections in the system has been evaluated with the model. After a 2 MW heat exchange, the water temperature is increased by at least 1circC for 10 km downstream the exchange.
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03597512⟩
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03515146⟩ Plus de détails...
Thermal energy counts for a large part of the total energy consumption. To reduce fossil fuel consumption for heat and cold generation, different low temperature heat sources have been considered. Water networks have been considered as a large amount of water flow through it. To measure the thermal potential of the system, this paper provides a method in unsteady state to determine water temperature and flow in large water systems made of buried pipes. The model has been applied to a raw water supply system made up of 5000 km of piping and carrying 200 million m3 annually situated in the south of France. Water temperature is calculated considering heat exchange and the spatial specificities of the network (diameter of the pipes, depth, type of soil ...). Soil and water temperature measurements have been made to validate the model values. The model can predict water flow and temperature according to time with good accuracy: maximal error of 10% on the flow is obtained, the root mean square error on the calculated temperature is 0.84 circle C, and the correlation coefficient between the calculated and the measured temperature values is 0.98. The impact of adding several heat (or cold) injections in the system has been evaluated with the model. After a 2 MW heat exchange, the water temperature is increased by at least 1circC for 10 km downstream the exchange.
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03515146⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03597596⟩ Plus de détails...
The design of bubble column for industrial applications is well known under near ambient pressure and temperature conditions, contrary to high pressure and temperature conditions. Accurate data on the evolution and behaviour of the bubbles is proposed as a basis for the evaluation of the surface area developed in the column and further design of such reactor. Two columns are used for the experiments: a small column (8 mL) with a total visualisation of the flow, and a bigger one (1 L), necessary for the scale up. Main results show that the influence of pressure and temperature are significant on the behaviour of bubbles and bubble size distribution and must be characterized and considered for the design of the columns in such conditions. The results allow the determination of two correlations: one for the bubble diameter and the other one for the bubble rise velocity, considering different parameters, and especially the superficial gas velocity in saturated conditions. These correlations are a basis to determine mass transfer correlations for the design of bubble column at high pressure and temperature conditions. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03597596⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03515133⟩ Plus de détails...
The design of bubble column for industrial applications is well known under near ambient pressure and temperature conditions, contrary to high pressure and temperature conditions. Accurate data on the evolution and behaviour of the bubbles is proposed as a basis for the evaluation of the surface area developed in the column and further design of such reactor. Two columns are used for the experiments: a small column (8 mL) with a total visualisation of the flow, and a bigger one (1 L), necessary for the scale up. Main results show that the influence of pressure and temperature are significant on the behaviour of bubbles and bubble size distribution and must be characterized and considered for the design of the columns in such conditions. The results allow the determination of two correlations: one for the bubble diameter and the other one for the bubble rise velocity, considering different parameters, and especially the superficial gas velocity in saturated conditions. These correlations are a basis to determine mass transfer correlations for the design of bubble column at high pressure and temperature conditions. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03515133⟩
Francisco Mendez-Alva, Hélène Cervo, Gorazd Krese, Greet van Eetvelde. Industrial symbiosis profiles in energy-intensive industries: Sectoral insights from open databases. Journal of Cleaner Production, 2021, 314, pp.128031. ⟨10.1016/j.jclepro.2021.128031⟩. ⟨hal-03514699⟩ Plus de détails...
Process industries are the foundation of the European economy, transforming raw materials into building blocks for strategic products and applications in today's society. Such industries range from steel, cement, or minerals to chemicals such as lubricants for wind turbines and polymers that prevent waste in logistic supply chains. The downside of this foundation industry is its high environmental impact regarding emissions, and intensive use of energy and resources. One of the key strategies to address such challenges is industrial symbiosis: various industries establish collective efforts to find value while transitioning to a more circular economy. This paper presents an exploratory analysis of databases on IS case studies. We used the European standard classification for economic activities (NACE) to draw industrial sector profiles for the most relevant energy-intensive industries: chemicals, steel, and cement, coupled with urban synergies. The majority of the synergies includes the chemicals sector with most commonly shared streams being energy, water, and carbon dioxide. IS cases are ranked in terms of frequency, then classified in topical groups and finally, the sustainability impact of the different categories is discussed. The outcome is a methodology to frame and assess industrial symbiosis case collections useful for future exploring and exploiting circularity projects in public and private organisations.
Francisco Mendez-Alva, Hélène Cervo, Gorazd Krese, Greet van Eetvelde. Industrial symbiosis profiles in energy-intensive industries: Sectoral insights from open databases. Journal of Cleaner Production, 2021, 314, pp.128031. ⟨10.1016/j.jclepro.2021.128031⟩. ⟨hal-03514699⟩
Mónica Amado, Cristian Barca, Mario Hernández, Jean-Henry Ferrasse. Evaluation of Energy Recovery Potential by Anaerobic Digestion and Dark Fermentation of Residual Biomass in Colombia. Frontiers in Energy Research, 2021, 9, ⟨10.3389/fenrg.2021.690161⟩. ⟨hal-03515212⟩ Plus de détails...
This study provides the first overview in Colombia on energy recovery potential by anaerobic digestion (AD) and dark fermentation (DF) of three different residual biomasses: coffee mucilage (CFM), cocoa mucilage (CCM), and swine manure (SM). First, AD and DF models were developed based on the ADM1 model. Then, simulated biogas production yields were compared to experimental data to validate the models. The results of comparative simulations indicate that energy recovery potentials from biogas for the different Colombian departments range from 148 to 48,990 toe, according to the local production amounts of CFM, CCM, and SM in 2017. The study provides crucial information that can be used to assess the best design, operation mode, and locations of AD and DF plants in Colombia. The results indicate that biogas production performances and energy recovery yields improve by increasing CFM/SM and/or CCM/SM ratios of the feed, and by increasing organic load from 2 to 26 gCOD∙l −1 .
Mónica Amado, Cristian Barca, Mario Hernández, Jean-Henry Ferrasse. Evaluation of Energy Recovery Potential by Anaerobic Digestion and Dark Fermentation of Residual Biomass in Colombia. Frontiers in Energy Research, 2021, 9, ⟨10.3389/fenrg.2021.690161⟩. ⟨hal-03515212⟩
Cristian Barca, Dario Scanu, Nicola Podda, Helene Miche, Laurent Poizat, et al.. Phosphorus removal from wastewater by carbonated bauxite residue under aerobic and anoxic conditions. Journal of Water Process Engineering, 2021, pp.101757. ⟨10.1016/j.jwpe.2020.101757⟩. ⟨hal-03036764⟩ Plus de détails...
This study aimed at evaluating the potential use of carbonated bauxite residue (CBR) as filter substrate to upgrade phosphorus (P) removal in small wastewater treatment plants such as constructed wetlands. Comparative experiments of P removal were performed in two columns continuously fed with synthetic and real wastewater to investigate the behavior of CBR under aerobic (column A) and anoxic biotic conditions (column B). The effect of various parameters, including pH, temperature, addition of organic carbon, and dissolved oxygen concentration, was investigated. Also, a series of chemical extractions was performed to elucidate the main mechanisms of P removal achieved by CBR. Over 140 days of operation, columns A and B showed a total P removal performance of 98.5% and 91.6%, thus reaching a total P removal capacity of 0.63 mg P/g CBR and 0.61 mg P/g CBR, respectively. The results indicate that 2 aeration conditions and microbial activity can significantly affect the performance of CBR filters. Under aerobic conditions, precipitation of CaP complexes appears to be the main mechanism leading to P removal. Under anoxic biotic conditions, microbially driven mobilization of Fe from CBR may provide Fe ions for Fe-P precipitation, but also it may lead to Fe release from the filters. This study provides crucial information to evaluate the potential use of CBR at different steps of the wastewater treatment process. Overall, the results indicate that the use of CBR filters is particularly suitable as a tertiary treatment step to remove P from effluents with low organic load under aerobic conditions.
Cristian Barca, Dario Scanu, Nicola Podda, Helene Miche, Laurent Poizat, et al.. Phosphorus removal from wastewater by carbonated bauxite residue under aerobic and anoxic conditions. Journal of Water Process Engineering, 2021, pp.101757. ⟨10.1016/j.jwpe.2020.101757⟩. ⟨hal-03036764⟩
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. A comparative study of conventional activated sludge and fixed bed hybrid biological reactor for oilfield produced water treatment: influence of hydraulic retention time. Chemical Engineering Journal, 2021, 420 (2), pp.127611. ⟨10.1016/j.cej.2020.127611⟩. ⟨hal-02989059⟩ Plus de détails...
This study focuses on the development of a hybrid biological reactor for the treatment of synthetic oilfield produced water. To face increasingly strict regulations concerning produced water discharge, a fixed bed hybrid biological reactor (FBHBR) containing a combination of free activated sludge and a fixed biofilm support was compared to a conventional activated sludge reactor (CAS). After gradual microbial acclimation, a 133-day experiment showed that both bioreactors were able to efficiently remove phenol, toluene, xylenes, and polycyclic aromatic hydrocarbons (PAHs) from a synthetic wastewater with a chemical oxygen demand (COD) removal rate above 95%, at hydraulic retention times (HRT) of 24 h and 18 h, and that only the FBHBR was able to maintain high removal efficiency at an HRT of 12 h. Ecotoxicity tests showed that outlet waters from both bioreactors were non-toxic. Assessment of the bacterial population revealed notable differences between the CAS reactor and FBHBR. In particular, wider diversity was observed in the FBHBR. The marked similarity between the bacterial composition of the free sludge and that of the biofilm in the FBHBR suggests that biofilm detachment played an important part role in bacterial development in the free sludge.
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. A comparative study of conventional activated sludge and fixed bed hybrid biological reactor for oilfield produced water treatment: influence of hydraulic retention time. Chemical Engineering Journal, 2021, 420 (2), pp.127611. ⟨10.1016/j.cej.2020.127611⟩. ⟨hal-02989059⟩
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. A comparative study of conventional activated sludge and fixed bed hybrid biological reactor for oilfield produced water treatment: influence of hydraulic retention time. Chemical Engineering Journal, 2021, 420 (2), pp.127611. ⟨10.1016/j.cej.2020.127611⟩. ⟨hal-02989059⟩ Plus de détails...
This study focuses on the development of a hybrid biological reactor for the treatment of synthetic oilfield produced water. To face increasingly strict regulations concerning produced water discharge, a fixed bed hybrid biological reactor (FBHBR) containing a combination of free activated sludge and a fixed biofilm support was compared to a conventional activated sludge reactor (CAS). After gradual microbial acclimation, a 133-day experiment showed that both bioreactors were able to efficiently remove phenol, toluene, xylenes, and polycyclic aromatic hydrocarbons (PAHs) from a synthetic wastewater with a chemical oxygen demand (COD) removal rate above 95%, at hydraulic retention times (HRT) of 24 h and 18 h, and that only the FBHBR was able to maintain high removal efficiency at an HRT of 12 h. Ecotoxicity tests showed that outlet waters from both bioreactors were non-toxic. Assessment of the bacterial population revealed notable differences between the CAS reactor and FBHBR. In particular, wider diversity was observed in the FBHBR. The marked similarity between the bacterial composition of the free sludge and that of the biofilm in the FBHBR suggests that biofilm detachment played an important part role in bacterial development in the free sludge.
Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. A comparative study of conventional activated sludge and fixed bed hybrid biological reactor for oilfield produced water treatment: influence of hydraulic retention time. Chemical Engineering Journal, 2021, 420 (2), pp.127611. ⟨10.1016/j.cej.2020.127611⟩. ⟨hal-02989059⟩
David Ranava, Cassandra Backes, Ganesan Karthikeyan, Olivier Ouari, Audrey Soric, et al.. Metabolic Exchange and Energetic Coupling between Nutritionally Stressed Bacterial Species: Role of Quorum-Sensing Molecules. mBio, 2021, 12 (1), pp.e02758-20. ⟨10.1128/mBio.02758-20⟩. ⟨hal-03115469⟩ Plus de détails...
Formation of multispecies communities allows nearly every niche on earth to be colonized, and the exchange of molecular information among neighboring bacteria in such communities is key for bacterial success. To clarify the principles controlling interspecies interactions, we previously developed a coculture model with two anaerobic bacteria, Clostridium acetobutylicum (Gram positive) and Desulfovibrio vulgaris Hildenborough (Gram negative, sulfate reducing). Under conditions of nutritional stress for D. vulgaris, the existence of tight cell-cell interactions between the two bacteria induced emergent properties. Here, we show that the direct exchange of carbon metabolites produced by C. acetobutylicum allows D vulgaris to duplicate its DNA and to be energetically viable even without its substrates. We identify the molecular basis of the physical interactions and how autoinducer-2 (AI-2) molecules control the interactions and metabolite exchanges between C. acetobutylicum and D. vulgaris (or Escherichia coli and D. vulgaris). With nutrients, D. vulgaris produces a small molecule that inhibits in vitro the AI-2 activity and could act as an antagonist in vivo. Sensing of AI-2 by D. vulgaris could induce formation of an intercellular structure that allows directly or indirectly metabolic exchange and energetic coupling between the two bacteria.
David Ranava, Cassandra Backes, Ganesan Karthikeyan, Olivier Ouari, Audrey Soric, et al.. Metabolic Exchange and Energetic Coupling between Nutritionally Stressed Bacterial Species: Role of Quorum-Sensing Molecules. mBio, 2021, 12 (1), pp.e02758-20. ⟨10.1128/mBio.02758-20⟩. ⟨hal-03115469⟩
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩ Plus de détails...
6 To date, there is no information on the microfluidic emulsification of dibutyl adipate and 7 n-butyl acetate in water. Since these solvents are very suitable for microencapsulation by 8 interfacial polymerization, it is highly necessary to study the emulsification behavior of these 9 solvents in microchannel. This work shows that the microfluidic emulsification of these sol-10 vents in water may fail to obtain stabilized flow regimes. This is due to droplet coalescence 11 and wall wetting, even if a hydrophilic microchip is used. Hydrodynamic results show that 12 squeezing and dripping regimes are especially affected because of the wall wetting by the 13 dispersed phase. This difficulty can be circumvented by adding a surfactant (here Tween 14 80) into the aqueous phase. However, high surfactant concentrations (ten times the crit-15 ical micelle concentration) should be used for the water-dibutyl adipate system. Indeed, 16 comparison of flow maps for several surfactant concentrations seems to indicate that the 17 dynamic interfacial tension is higher than the one expected (equilibrium), for surfactant 18 concentrations lower than one hundred times the critical micelle concentration. The esti-19 mated diffusion time of Tween 80 is compared to the droplet formation time at different 20 conditions. The choice of more appropriate dimensionless numbers to represent flow maps 21 is also discussed. 22
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩
Kelly Ohanessian, Mathias Monnot, Philippe Moulin, Jean-Henry Ferrasse, Cristian Barca, et al.. Dead-end and crossflow ultrafiltration process modelling: Application on chemical mechanical polishing wastewaters. Chemical Engineering Research and Design, 2020, 158, pp.164-176. ⟨10.1016/j.cherd.2020.04.007⟩. ⟨hal-02892457⟩ Plus de détails...
Dynamic simulation of ultrafiltration process is applied to the treatment of chemical mechanical polishing wastewater from microelectronic industry. The ultrafiltration of nanoparticles (NPs) contained in chemical mechanical polishing wastewater is modelled by using different mathematical equations, which are derived from the literature and optimized to the effluent and filtration modes (dead-end or crossflow). A series of ultrafiltration experiments at laboratory scale are carried out by using chemical mechanical polishing wastewater to optimize and validate the models. Complete dead-end and crossflow ultrafiltration models are developed to simulate the treatment performances of chemical mechanical polishing wastewater under dynamic full-scale and different operating conditions, thus including filtration and washing steps. Simulations show that the dead-end mode is not suitable for chemical mechanical polishing wastewater concentration higher than 100 mgNPs L-1 due to the too fast fouling time and to the high frequency of washing step. The high concentration of chemical mechanical polishing P wastewater (2600 mgNPs L-1) forces industries to use crossflow ultrafiltration to have a profitable process by controlling parameters such as the filtration/backwashing number of cycles, the needed filtering surface and the filtration flux.
Kelly Ohanessian, Mathias Monnot, Philippe Moulin, Jean-Henry Ferrasse, Cristian Barca, et al.. Dead-end and crossflow ultrafiltration process modelling: Application on chemical mechanical polishing wastewaters. Chemical Engineering Research and Design, 2020, 158, pp.164-176. ⟨10.1016/j.cherd.2020.04.007⟩. ⟨hal-02892457⟩
Xiaotong Zhan, Sabine Michaud-Chevallier, Damien Hérault, Françoise Duprat. On-Line Analysis of the Heterogeneous Pd-Catalyzed Transfer Hydrogenation of p -Nitrophenol in Water with Formic Acid in a Flow Reactor. Organic Process Research and Development, 2020, 24 (5), pp.686-694. ⟨10.1021/acs.oprd.9b00291⟩. ⟨hal-02611832⟩ Plus de détails...
An versatile experimental setup composed of a fixed-bed reactor and an HPLC apparatus has been developed for the study of heterogeneous catalytic reactions under transient conditions. The transfer hydrogen reaction of formic acid in water to give p-nitrophenol catalyzed by Pd@Al 2 O 3 support was chosen as the model reaction in a flow reactor. On one hand, this setup allowed the first experimental on-line measurements of p-aminophenol in an acidic medium, indicating that it is the only product of the reaction at steady state. On the other hand, the setup evidenced a quite long transient period before stationary conditions were reached, involving a transient component that is quite instable and can transform to p-aminophenol without a catalyst. Results of numerical simulations indicate that only a change in the reaction mechanism, due to a change in the catalyst activity after few minutes of reaction, can explain the transient production of this intermediate and that this occurs when the active hydrogen coverage of the catalyst is low.
Xiaotong Zhan, Sabine Michaud-Chevallier, Damien Hérault, Françoise Duprat. On-Line Analysis of the Heterogeneous Pd-Catalyzed Transfer Hydrogenation of p -Nitrophenol in Water with Formic Acid in a Flow Reactor. Organic Process Research and Development, 2020, 24 (5), pp.686-694. ⟨10.1021/acs.oprd.9b00291⟩. ⟨hal-02611832⟩
Dan Feng, Laure Malleret, Audrey Soric, Olivier Boutin. Kinetic study of glyphosate degradation in wet air oxidation conditions. Chemosphere, 2020, 247, pp.125930. ⟨10.1016/j.chemosphere.2020.125930⟩. ⟨hal-02892476⟩ Plus de détails...
Glyphosate is one of the most widely used herbicides in the world against perennial and annual weeds. It has been reported to be a micro pollutant, and its degradation in different wastewater treatment processes must be studied. For that purpose, the kinetics of wet air oxidation of glyphosate was studied in an autoclave reactor at a temperature range of 423-523 K and under a total pressure of 15 MPa. Oxidation reactions obeyed the first-order kinetics with respect to glyphosate concentration. The activation energy for glyphosate oxidation was found to be equal to 68.4 kJ mol(-1). Furthermore, the possible reaction intermediates and main end products of glyphosate degradation in the wet air oxidation process were identified and quantified using UV-spectrophotometry and liquid chromatography coupled to high resolution mass spectrometry. A degradation pathway for glyphosate oxidation was proposed.
Dan Feng, Laure Malleret, Audrey Soric, Olivier Boutin. Kinetic study of glyphosate degradation in wet air oxidation conditions. Chemosphere, 2020, 247, pp.125930. ⟨10.1016/j.chemosphere.2020.125930⟩. ⟨hal-02892476⟩
C. Pinchai, Mathias Monnot, S. Lefèvre, Olivier Boutin, Philippe Moulin. Membrane filtration coupled with wet air oxidation for intensified treatment of biorefractory effluents. Water Science and Technology, 2020, pp.wst2020052. ⟨10.2166/wst.2020.052⟩. ⟨hal-02481682⟩ Plus de détails...
This work aims to analyse the performances of a new hybrid process: membrane filtration to concentrate biorefractory wastewater before being treated by a hydrothermal process such as wet air oxidation. The aim is to obtain a complete discharge of the effluent in the environment. The three different synthetic wastewaters under study were pharmaceutical wastewater, grey wastewater and bilge wastewater. The results of the membrane filtration showed high retention rates as it could reach between 75% and 100% of total organic carbon rentention, more than 99% of turbidity removal and more than 70% of hydrocarbon retention. Moreover, it was possible to achieve high concentration factors comprised between 17 and 40 times. Membrane fouling was chemically reversible regardless of the type of pollution. Then, the treatment of the membrane retentates by wet air oxidation process (300 °C, 15 MPa) could eliminate more than 83% of organic pollution for all the tested effluents. In summary, the hybrid intensified process could finally decrease the volume and the waste load of wastewater before possibly discharging it into the environment.
C. Pinchai, Mathias Monnot, S. Lefèvre, Olivier Boutin, Philippe Moulin. Membrane filtration coupled with wet air oxidation for intensified treatment of biorefractory effluents. Water Science and Technology, 2020, pp.wst2020052. ⟨10.2166/wst.2020.052⟩. ⟨hal-02481682⟩
Hélène Cervo, Jean-Henry Ferrasse, Bernard Descales, Greet van Eetvelde. Blueprint: A methodology facilitating data exchanges to enhance the detection of industrial symbiosis opportunities – application to a refinery. Chemical Engineering Science, 2020, 211, pp.115254. ⟨10.1016/j.ces.2019.115254⟩. ⟨hal-02319708⟩ Plus de détails...
The European Union (EU) has put the concept of circularity at the heart of its strategy for transitioning towards a low-carbon economy and reducing the use of virgin resources. Concrete measures, such as clarifying rules on co-products or supporting innovative projects, have been taken in order to promote Industrial Symbiosis (IS)-turning one industry's co-product into another industry's raw material. However, one of the main barriers to the democratisation of IS remains the exchange of (confidential) data between industrial partners. Here, the concept of industrial sector blueprints is presented as a solution in order to overcome the challenge of sharing information across industrial sectors. A blueprint is constituted of a series of profiles providing insights on the key inputs and outputs of a given industry in terms of thermal and electrical energy, materials and services. A heuristic and comprehensive methodology is presented detailing a step-by-step approach for building the profiles and the type of data required. It is applied to a typical refinery demonstrating the efficiency of the method and showing how it can be used in an IS context.
Hélène Cervo, Jean-Henry Ferrasse, Bernard Descales, Greet van Eetvelde. Blueprint: A methodology facilitating data exchanges to enhance the detection of industrial symbiosis opportunities – application to a refinery. Chemical Engineering Science, 2020, 211, pp.115254. ⟨10.1016/j.ces.2019.115254⟩. ⟨hal-02319708⟩
Dan Feng, Audrey Soric, Olivier Boutin. Treatment technologies and degradation pathways of glyphosate: A critical review. Science of the Total Environment, 2020, 742, pp.140559. ⟨10.1016/j.scitotenv.2020.140559⟩. ⟨hal-02960128⟩ Plus de détails...
Glyphosate is one of the most widely used post-emergence broad-spectrum herbicides in the world. This molecule has been frequently detected in aqueous environment and can cause adverse effects to plants, animals, microorganisms, and humans. This review offers a comparative assessment of current treatment methods (physical, biological, and advanced oxidation process) for glyphosate wastewaters, considering their advantages and drawbacks. As for other molecules, adsorption does not destroy glyphosate. It can be used before other processes, if glyphosate concentrations are very high, or after, to decrease the final concentration of glyphosate and its by-products. Most of biological and oxidation processes can destroy glyphosate molecules, leading to by-products (the main ones being AMAP and sarcosine) that can be or not affected by these processes. This point is of major importance to control process efficiency. That is the reason why a specific focus on glyphosate degradation pathways by biological treatment or different advanced oxidation processes is proposed. However, one process is usually not efficient enough to reach the required standards. Therefore, the combination of processes (for instance biological and oxidation ones) seems to be high-performance technologies for the treatment of glyphosate-containing wastewater, due to their potential to overcome some drawbacks of each individual process. Finally, this review provides indications for future work for different treatment processes to increase their performances and gives some insights into the treatment of glyphosate or other organic contaminants in wastewater.
Dan Feng, Audrey Soric, Olivier Boutin. Treatment technologies and degradation pathways of glyphosate: A critical review. Science of the Total Environment, 2020, 742, pp.140559. ⟨10.1016/j.scitotenv.2020.140559⟩. ⟨hal-02960128⟩
Dan Feng, Laure Malleret, Guillaume Chiavassa, Olivier Boutin, Audrey Soric. Biodegradation capabilities of acclimated activated sludge towards glyphosate: Experimental study and kinetic modeling. Biochemical Engineering Journal, 2020, 161, pp.107643. ⟨10.1016/j.bej.2020.107643⟩. ⟨hal-02960167⟩ Plus de détails...
The acclimation process of activated sludge from a wastewater treatment plant for degradation of glyphosate and its biodegradation kinetics were studied in a batch reactor. The parameters monitored included the concentrations of glyphosate, as well as aminomethylphosphonic acid (AMPA), its main metabolite, total organic carbon (TOC), pH, dissolved oxygen (DO) and biomass concentration. M the end of the acclimation process, glyphosate removal efficiency of the acclimated sludge was compared to the fresh sludge one. The results showed that the acclimation process highly increased degradation efficiency. Complete glyphosate removal has been achieved during kinetics experiments. Glyphosate removal kinetic of the acclimated sludge was modeled by Monod model that accurately fitted the experimental results with a maximum growth rate (mu(max)) of 0.34 h(-1) and half-saturation constant (K-s) of 1600 mg L-1. Finally, a biodegradation pathway of glyphosate used as carbon source was proposed.
Dan Feng, Laure Malleret, Guillaume Chiavassa, Olivier Boutin, Audrey Soric. Biodegradation capabilities of acclimated activated sludge towards glyphosate: Experimental study and kinetic modeling. Biochemical Engineering Journal, 2020, 161, pp.107643. ⟨10.1016/j.bej.2020.107643⟩. ⟨hal-02960167⟩
Camille Grandclement, Anne Piram, Marie-Eleonore Petit, Isabelle Seyssiecq, Isabelle Laffont-Schwob, et al.. Biological Removal and Fate Assessment of Diclofenac Using Bacillus subtilis and Brevibacillus laterosporus Strains and Ecotoxicological Effects of Diclofenac and 49-Hydroxy-diclofenac. Journal of Chemistry , 2020, 2020, pp.9789420. ⟨10.1155/2020/9789420⟩. ⟨hal-02564026⟩ Plus de détails...
Since bacterial consortia involved in conventional wastewater treatment processes are not efficient in removing diclofenac (DCF), an emerging pollutant frequently detected in water bodies, the identification of microorganisms able to metabolise this pharmaceutical compound is relevant. us, DCF removal was investigated using bacteria isolated from aqueous stock solutions of this micro-pollutant and identified as Bacillus and Brevibacillus species using 16S rRNA gene sequencing. A 100% DCF removal was achieved after 17 hours of experiment at 20°C in a nutrient medium; the biodegradation kinetic followed a pseudo-first order (k biol = 11 L·g SS −1 ·d −1). Quantitative assessment of DCF removal showed that its main route was biotic degradation. e main degradation product of DCF, 4′-hydroxy-diclofenac (4′-OH-DCF), was identified using liquid chromatography-electrospray ionisation high-resolution mass spectrometry. Since the ecotoxicological impact of 4′-hydroxy-diclofenac was not reported in the literature, the ecotoxicity of DCF and its metabolite were tentatively evaluated using Vibrio fischeri bioassays. Results from these tests showed that this metabolite is not more toxic than its parent compound and may hopefully be an intermediate product in the DCF transformation. Indeed, no significant difference in ecotoxicity was observed after 30 min between DCF (50 should be writtten in subscript all along the manuscript in EC 50 = 23 ± 4 mg·L −1) and 4′-hydroxy-diclofenac (EC 50 = 19 ± 2 mg·L −1). Besides, the study highlighted a limit of the Microtox ® bioassay, which is largely used to assess ecotoxicity. e bioluminescence of Vibrio fischeri was impacted due to the production of microbial activity and the occurrence of some carbon source in the studied medium.
Camille Grandclement, Anne Piram, Marie-Eleonore Petit, Isabelle Seyssiecq, Isabelle Laffont-Schwob, et al.. Biological Removal and Fate Assessment of Diclofenac Using Bacillus subtilis and Brevibacillus laterosporus Strains and Ecotoxicological Effects of Diclofenac and 49-Hydroxy-diclofenac. Journal of Chemistry , 2020, 2020, pp.9789420. ⟨10.1155/2020/9789420⟩. ⟨hal-02564026⟩
Chamaiporn Pinchai, Mathias Monnot, Sébastien Lefevre, Olivier Boutin, Philippe Moulin. Coupling membrane filtration and wet air oxidation for advanced wastewater treatment: Performance at the pilot scale and process intensification potential. Canadian Journal of Chemical Engineering, 2019, pp.1-10. ⟨10.1002/cjce.23688⟩. ⟨hal-02416179⟩ Plus de détails...
Bio‐refractory wastewater treatment is compulsory for a safe discharge into the environment. This paper aims to study the use of membrane processes to concentrate wastewater to be then treated by a hydrothermal process such as wet air oxidation for advanced and intensified wastewater treatment. The work focused on three different synthetic wastewaters of public or industrial interest: pharmaceutical wastewater, grey wastewater, and bilge wastewater. Membrane processes operated at the pilot scale enabled retentions as high as 100% of total organic carbon, more than 99% of turbidity, and 70% of hydrocarbon, respectively. High concentration factors were obtained. Membrane foulings were chemically reversible whatever the type of wastewater or the membrane process. Thanks to membrane filtrations, the volumes to be treated by wet air oxidation were drastically reduced, leading to high energy savings. Membrane retentates were then treated by wet air oxidation (300°C, 15 MPa) and resulted in more than an 83% mineralization rate, regardless of the effluent. The hybrid intensified process presented in this work strongly increased the possibility of discharging into the environment by mixing the process outputs or greatly reducing the discharge volume and ultimately the waste load.
Chamaiporn Pinchai, Mathias Monnot, Sébastien Lefevre, Olivier Boutin, Philippe Moulin. Coupling membrane filtration and wet air oxidation for advanced wastewater treatment: Performance at the pilot scale and process intensification potential. Canadian Journal of Chemical Engineering, 2019, pp.1-10. ⟨10.1002/cjce.23688⟩. ⟨hal-02416179⟩
Hélène Cervo, Stéphane Ogé, Amtul Samie Maqbool, Francisco Mendez Alva, Lindsay Lessard, et al.. A Case Study of Industrial Symbiosis in the Humber Region Using the EPOS Methodology. Sustainability, 2019, 11 (24), pp.6940. ⟨10.3390/su11246940⟩. ⟨hal-02395672⟩ Plus de détails...
For the last 20 years, the field of industrial symbiosis (IS) has raised interest among academics and industries. IS consists of dissimilar entities sharing and valorising underutilised resources such as materials, energy, information, services, or technologies in the view of increasing the industrial system's circularity. Despite the benefits brought by IS, though, barriers hindering the full dissemination of IS remain. This paper presents a methodology developed in the framework of the H2020 European project EPOS that aims at removing some of the obstacles to the implementation of IS. The method follows a multidisciplinary approach that intents to trigger the interest of industry decision-makers and initiate efforts to optimise the use of energy and material resources through symbiosis. It is applied to an industrial cluster located in the Humber region of UK. The case study shows how the approach helped to identify several IS opportunities, how one particular high-potential symbiosis was further assessed, and how it led to the creation of a business case. It was estimated that the identified symbiosis could bring substantial economic (+2000 k€ pa), environmental (−4000 t of CO 2 eq. pa) and social (+7 years of healthy life) gains to the region.
Hélène Cervo, Stéphane Ogé, Amtul Samie Maqbool, Francisco Mendez Alva, Lindsay Lessard, et al.. A Case Study of Industrial Symbiosis in the Humber Region Using the EPOS Methodology. Sustainability, 2019, 11 (24), pp.6940. ⟨10.3390/su11246940⟩. ⟨hal-02395672⟩
Thomas Cattagni, Maxime Geiger, Anthony Supiot, Raphael Zory, Didier Pradon, et al.. A single session of bihemispheric transcranial direct current stimulation does not improve quadriceps muscle spasticity in people with chronic stroke. Brain Stimulation, Elsevier, 2019, 12 (5), pp.1309-1311. ⟨10.1016/j.brs.2019.06.027⟩. ⟨hal-02528921⟩ Plus de détails...
Thomas Cattagni, Maxime Geiger, Anthony Supiot, Raphael Zory, Didier Pradon, et al.. A single session of bihemispheric transcranial direct current stimulation does not improve quadriceps muscle spasticity in people with chronic stroke. Brain Stimulation, Elsevier, 2019, 12 (5), pp.1309-1311. ⟨10.1016/j.brs.2019.06.027⟩. ⟨hal-02528921⟩
Thomas Cattagni, Maxime Geiger, Anthony Supiot, Philippe de Mazancourt, Didier Pradon, et al.. A single session of anodal transcranial direct current stimulation applied over the affected primary motor cortex does not alter gait parameters in chronic stroke survivors. Neurophysiologie Clinique/Clinical Neurophysiology, Elsevier Masson, 2019, 49 (4), pp.283-293. ⟨10.1016/j.neucli.2019.07.012⟩. ⟨hal-02528918⟩ Plus de détails...
Thomas Cattagni, Maxime Geiger, Anthony Supiot, Philippe de Mazancourt, Didier Pradon, et al.. A single session of anodal transcranial direct current stimulation applied over the affected primary motor cortex does not alter gait parameters in chronic stroke survivors. Neurophysiologie Clinique/Clinical Neurophysiology, Elsevier Masson, 2019, 49 (4), pp.283-293. ⟨10.1016/j.neucli.2019.07.012⟩. ⟨hal-02528918⟩
Ct Nzogo Metoule, S. Delaby, Jean-Henry Ferrasse, Olivier Boutin. Hydrothermal process development for the treatment of crocidolite asbestos waste. Waste Management and Research, 2019, 37 (9), pp.914-924. ⟨10.1177/0734242X19859426⟩. ⟨hal-02450344⟩ Plus de détails...
Ct Nzogo Metoule, S. Delaby, Jean-Henry Ferrasse, Olivier Boutin. Hydrothermal process development for the treatment of crocidolite asbestos waste. Waste Management and Research, 2019, 37 (9), pp.914-924. ⟨10.1177/0734242X19859426⟩. ⟨hal-02450344⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩ Plus de détails...
Gas holdup of water/nitrogen, water-phenol/nitrogen and water-phenol/air systems was successfully measured by a method based on the use of a differential pressure sensor installed on a bubble column reactor, in a wide domain of temperature (from 100 to 300 degrees C) and pressure (from 10 to 30 MPa). These experimental conditions are little or no explored in literature. Results show a predominant influence of the superficial gas velocity, the evaporation of the liquid phase, the ratio of the gas volume flowrate on the liquid volume flowrate and the phenol concentration. Pressure and chemical reaction have little effect on gas holdup. The temperature has an effect in the case of phenol solutions. The different correlations and parameters influence determined in this work are very helpful for the design of gas liquid contactors (for instance bubble column) at high pressure and high temperature.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, Elsevier, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩ Plus de détails...
Gas holdup of water/nitrogen, water-phenol/nitrogen and water-phenol/air systems was successfully measured by a method based on the use of a differential pressure sensor installed on a bubble column reactor, in a wide domain of temperature (from 100 to 300 degrees C) and pressure (from 10 to 30 MPa). These experimental conditions are little or no explored in literature. Results show a predominant influence of the superficial gas velocity, the evaporation of the liquid phase, the ratio of the gas volume flowrate on the liquid volume flowrate and the phenol concentration. Pressure and chemical reaction have little effect on gas holdup. The temperature has an effect in the case of phenol solutions. The different correlations and parameters influence determined in this work are very helpful for the design of gas liquid contactors (for instance bubble column) at high pressure and high temperature.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, Elsevier, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩
Nicolas Lusinier, Isabelle Seyssiecq, Cécilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. Biological Treatments of Oilfield Produced Water: A Comprehensive Review. SPE Journal, 2019, ⟨10.2118/195677-PA⟩. ⟨hal-02118229⟩ Plus de détails...
Nicolas Lusinier, Isabelle Seyssiecq, Cécilia Sambusiti, Matthieu Jacob, Nicolas Lesage, et al.. Biological Treatments of Oilfield Produced Water: A Comprehensive Review. SPE Journal, 2019, ⟨10.2118/195677-PA⟩. ⟨hal-02118229⟩
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩ Plus de détails...
Bubbles hydrodynamic in gas-liquid contactor, including bubble size distribution, bubble size and gas-liquid interfacial area, was evaluated as a function of superficial gas velocity, superficial liquid velocity, temperature, pressure and different gases (N-2 and He) and liquids (water and ethanol/water mixture) phases. The results showed that with the increase of superficial gas velocity, the bubble size distribution shifted from smaller- to larger-size bubble and the Sauter mean diameter, the gas holdup and the interfacial area generally increased due to the increase of coalescence. The effect of superficial liquid velocity on bubble characteristics was not significant. Pressure and temperature showed slight influence on gas holdup and interfacial area. The bubble characteristics were not significantly influenced by the type of gas phase, but mainly affected by the liquid composition. Correlations to predict Sauter mean bubble diameter and the gas holdup are developed using Kanaris correlation and in good agreement with experimental results.
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩
Cristian Barca, Mathieu Martino, Pierre Hennebert, Nicolas Roche. Kinetics and capacity of phosphorus extraction from solid residues obtained from wet air oxidation of sewage sludge. Waste Management, Elsevier, 2019, 89, pp.275-283. ⟨10.1016/j.wasman.2019.04.024⟩. ⟨hal-02118222⟩ Plus de détails...
Solid residues from thermal treatments of sewage sludge (SS) represent a valuable source of phosphorus (P) for the fertilizer production. This study aims at evaluating the P recovery potential from solid residues obtained from wet air oxidation of SS under subcritical water conditions (WAO residues). A series of P extraction experiments was performed by acidic and alkaline leaching at different liquid to solid ratios. Hot chemical extractions and P fractionations were also carried out to characterize the chemical composition of the WAO residues. The main objectives of this work were to determine the best operating conditions for P extraction, and to describe and understand the kinetics and the main mechanisms leading to P release. The results obtained in this study indicate that 1 M citric acid and 1 M HCl at the liquid to solid ratio of 10 L/kg can extract 61% and 65% of the total P content after 2 h of contact time at room temperature, thus giving P extraction capacities of 81 and 86 g P/kg WAO residues, respectively. The analysis of kinetic data indicates that P extraction with 1 M HCl is faster, but 1 M citric acid can give higher P extraction efficiencies at the equilibrium. The molar ratios of Ca to P of the leachates suggest that P extraction from WAO residues was primarily due to the dissolution of a mixture of various Ca-P complexes. (C) 2019 Elsevier Ltd. All rights reserved.
Cristian Barca, Mathieu Martino, Pierre Hennebert, Nicolas Roche. Kinetics and capacity of phosphorus extraction from solid residues obtained from wet air oxidation of sewage sludge. Waste Management, Elsevier, 2019, 89, pp.275-283. ⟨10.1016/j.wasman.2019.04.024⟩. ⟨hal-02118222⟩
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, Elsevier, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩ Plus de détails...
Bubbles hydrodynamic in gas-liquid contactor, including bubble size distribution, bubble size and gas-liquid interfacial area, was evaluated as a function of superficial gas velocity, superficial liquid velocity, temperature, pressure and different gases (N-2 and He) and liquids (water and ethanol/water mixture) phases. The results showed that with the increase of superficial gas velocity, the bubble size distribution shifted from smaller- to larger-size bubble and the Sauter mean diameter, the gas holdup and the interfacial area generally increased due to the increase of coalescence. The effect of superficial liquid velocity on bubble characteristics was not significant. Pressure and temperature showed slight influence on gas holdup and interfacial area. The bubble characteristics were not significantly influenced by the type of gas phase, but mainly affected by the liquid composition. Correlations to predict Sauter mean bubble diameter and the gas holdup are developed using Kanaris correlation and in good agreement with experimental results.
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, Elsevier, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩
Cristian Barca, Mathieu Martino, Pierre Hennebert, Nicolas Roche. Kinetics and capacity of phosphorus extraction from solid residues obtained from wet air oxidation of sewage sludge. Waste Management, 2019, 89, pp.275-283. ⟨10.1016/j.wasman.2019.04.024⟩. ⟨hal-02118222⟩ Plus de détails...
Solid residues from thermal treatments of sewage sludge (SS) represent a valuable source of phosphorus (P) for the fertilizer production. This study aims at evaluating the P recovery potential from solid residues obtained from wet air oxidation of SS under subcritical water conditions (WAO residues). A series of P extraction experiments was performed by acidic and alkaline leaching at different liquid to solid ratios. Hot chemical extractions and P fractionations were also carried out to characterize the chemical composition of the WAO residues. The main objectives of this work were to determine the best operating conditions for P extraction, and to describe and understand the kinetics and the main mechanisms leading to P release. The results obtained in this study indicate that 1 M citric acid and 1 M HCl at the liquid to solid ratio of 10 L/kg can extract 61% and 65% of the total P content after 2 h of contact time at room temperature, thus giving P extraction capacities of 81 and 86 g P/kg WAO residues, respectively. The analysis of kinetic data indicates that P extraction with 1 M HCl is faster, but 1 M citric acid can give higher P extraction efficiencies at the equilibrium. The molar ratios of Ca to P of the leachates suggest that P extraction from WAO residues was primarily due to the dissolution of a mixture of various Ca-P complexes. (C) 2019 Elsevier Ltd. All rights reserved.
Cristian Barca, Mathieu Martino, Pierre Hennebert, Nicolas Roche. Kinetics and capacity of phosphorus extraction from solid residues obtained from wet air oxidation of sewage sludge. Waste Management, 2019, 89, pp.275-283. ⟨10.1016/j.wasman.2019.04.024⟩. ⟨hal-02118222⟩
Pierre Haldenwang, Braulio Bernales, Pierrette Guichardon, Nelson Ibaseta. Simple Theoretical Results on Reversible Fouling in Cross-Flow Membrane Filtration. Membranes, 2019, Application of Membrane Filtration in Industrial Processes, and in the Treatment of Water and Industrial Wastewater), 9 (4), pp.48. ⟨10.3390/membranes9040048⟩. ⟨hal-02109009⟩ Plus de détails...
In cross-flow membrane filtration, fouling results from material deposit which clogs the membrane inner surface. This hinders filtration, which experiences the so-called limiting flux. Among the models proposed by the literature, we retain a simple one: a steady-state reversible fouling is modelled with the use of a single additional parameter, i.e., N d , the ratio of the critical concentration for deposition to the feed concentration at inlet. To focus on fouling, viscous pressure drop and osmotic (counter-)pressure have been chosen low. It results in a minimal model of fouling. Solved thoroughly with the numerical means appropriate to enforce the nonlinear coupling between permeation and concentration polarization, the model delivers novel information. It first shows that permeation is utterly governed by solute transfer, the relevant non-dimensional quantities being hence limited to N d and Pe in , the transverse Péclet number. Furthermore, when the role played by N d and moderate Pe in (say Pe in < 40) is investigated, all results can be interpreted with the use of a single non-dimensional parameter, F l , the so-called fouling number, which simply reads F l ≡ Pe in N −1 d. Now rendered possible, the overall fit of the numerical data allows us to put forward analytical final expressions, which involve all the physical parameters and allow us to retrieve the experimental trends.
Pierre Haldenwang, Braulio Bernales, Pierrette Guichardon, Nelson Ibaseta. Simple Theoretical Results on Reversible Fouling in Cross-Flow Membrane Filtration. Membranes, 2019, Application of Membrane Filtration in Industrial Processes, and in the Treatment of Water and Industrial Wastewater), 9 (4), pp.48. ⟨10.3390/membranes9040048⟩. ⟨hal-02109009⟩
Marine Minière, Olivier Boutin, Audrey Soric. Combination of chemical and biological processes to enhance the treatment of hardly biodegradable matter in industrial wastewater: Selection parameters and performances. Canadian Journal of Chemical Engineering, 2019, 97 (S1), pp.1361-1370. ⟨10.1002/cjce.23414⟩. ⟨hal-02177025⟩ Plus de détails...
The increasing complexity of industrial effluents, combined with the increase in discharge constraints, leads to the necessity to improve processes treatment. Apart from new processes, the combination and optimization of existing processes could be the answer to these questions. Regarding coupling processes, the purifying potential has been demonstrated for a large range of processes, pollutants, and effluents. However, there has been a lack of studies integrating a biological process, although this has increased since 2000. The objective of this review is to focus on the combination of chemical and biological treatments for industrial applications and to provide recommendations based on different examples from the literature.
Marine Minière, Olivier Boutin, Audrey Soric. Combination of chemical and biological processes to enhance the treatment of hardly biodegradable matter in industrial wastewater: Selection parameters and performances. Canadian Journal of Chemical Engineering, 2019, 97 (S1), pp.1361-1370. ⟨10.1002/cjce.23414⟩. ⟨hal-02177025⟩
Jonathan Goffe, Jean-Henry Ferrasse. Stoichiometry impact on the optimum efficiency of biomass conversion to biofuels. Energy, 2019, 170, pp.438-458. ⟨10.1016/j.energy.2018.12.137⟩. ⟨hal-02900619⟩ Plus de détails...
Biomass has the specific characteristic of being included in a short regeneration cycle that minimizes its ecological impact and should give it a preferential role in the energy transition. The scale up in the deployment of bioenergy requires an objective approach to processes. It is necessary to identify, according to a defined and available biomass, the most appropriate processes and products to extend their deployment This requires deep process analysis to identify achievable optimizations and opportunities of improvement. In order to provide criteria to identify the upper theoretical limits of biomass conversion, a theoretical approach to the conversion of two biomass (lignocellulosic and microalguae) into simple energy vector as alkanes, alcohols, carbon monoxide or hydrogen is carried out. Modelling highlights the importance of stoichiometry in the feasibility and efficiency of biomass conversions. The impact of hydrogen supply and its energy cost in improving conversion efficiency is also underlined. In terms of biomass conversion results, microalgae provide better conversion efficiency than lignocellulosic biomass. For these reactions, an optimal carbon conversion ratio is identified. The optimum conversion ratios are about 36% to 46% for short chains such as methane or methanol and 64% to 75% for long chains. • Stoichiometry plays a major role in the biomass conversion • Optimum limit for biomass conversions are identified for alkanes, alcohols, H 2 and CO production • Hydrogen supply source can improve conversion efficiency • Proposal of a methodology to calculate efficiency for biomass conversion
Jonathan Goffe, Jean-Henry Ferrasse. Stoichiometry impact on the optimum efficiency of biomass conversion to biofuels. Energy, 2019, 170, pp.438-458. ⟨10.1016/j.energy.2018.12.137⟩. ⟨hal-02900619⟩
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩ Plus de détails...
Surface tension of water/nitrogen and water-phenol/nitrogen systems was successfully measured by the hanging drop method in a wide domain of temperature (from 100 to 300°C) and pressure (from 4 to 30MPa), conditions little explored literature. Results show that surface tension of water-phenol mixtures decreases as phenol mass fraction increases. This decrease is observed under saturated and unsaturated conditions and is more pronounced at low temperatures and does not seem to depend on pressure. The effect of saturation on surface tension in the water/nitrogen system has been correlated with water vapor pressure by using experimental points with a great accuracy. For the water-phenol/nitrogen system, experimental data obtained with different mass fraction of phenol were correlated using Macleod-Sugden equation for mixtures. Topical heading Reaction Engineering, Kinetics and Catalysis Transport Phenomena and Fluid Mechanics
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩ Plus de détails...
Surface tension of water/nitrogen and water-phenol/nitrogen systems was successfully measured by the hanging drop method in a wide domain of temperature (from 100 to 300°C) and pressure (from 4 to 30MPa), conditions little explored literature. Results show that surface tension of water-phenol mixtures decreases as phenol mass fraction increases. This decrease is observed under saturated and unsaturated conditions and is more pronounced at low temperatures and does not seem to depend on pressure. The effect of saturation on surface tension in the water/nitrogen system has been correlated with water vapor pressure by using experimental points with a great accuracy. For the water-phenol/nitrogen system, experimental data obtained with different mass fraction of phenol were correlated using Macleod-Sugden equation for mixtures. Topical heading Reaction Engineering, Kinetics and Catalysis Transport Phenomena and Fluid Mechanics
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩
Marine Minière, Olivier Boutin, Audrey Soric. Evaluation of degradation and kinetics parameters of acid orange 7 through wet air oxidation process. Canadian Journal of Chemical Engineering, 2018, 96 (11), pp.2450-2454. ⟨10.1002/cjce.23195⟩. ⟨hal-02114681⟩ Plus de détails...
Among the industrial effluents presenting constraints to traditional biological treatments, those from textile industries are of particular concern. Wet air oxidation is an effective process that significantly increases biodegradability of the treated effluent. In this study, the advantage of this process was tested for the treatment of acid orange 7, a dye molecule used as a model textile effluent. Different experimental conditions of temperature (200 to 300 8C) and duration of treatment were used to determine its degradation yield during the wet air oxidation process, at a total pressure of 30 MPa. All these conditions led to complete degradation of acid orange 7, but residual Total Organic Carbon always remained. Oxidation byproducts were identified by the means of GC and HPLC analyses. Acetic acid remains the major compound not oxidized. These experiments resulted in the proposal of a reaction scheme associated with kinetic constants. Finally, the optimal conditions for the improvement of the biodegradability of the effluent were determined. This wet air oxidation process could then be coupled with a biological treatment to obtain an overall degradation meeting the criteria for release into the environment.
Marine Minière, Olivier Boutin, Audrey Soric. Evaluation of degradation and kinetics parameters of acid orange 7 through wet air oxidation process. Canadian Journal of Chemical Engineering, 2018, 96 (11), pp.2450-2454. ⟨10.1002/cjce.23195⟩. ⟨hal-02114681⟩
Hiba Souissi, Raphael Zory, Julien Boudarham, Didier Pradon, Nicolas Roche, et al.. Muscle force strategies for poststroke hemiparetic patients during gait. Topics in Stroke Rehabilitation, 2018, 26 (1), pp.58-65. ⟨10.1080/10749357.2018.1536023⟩. ⟨hal-02506537⟩ Plus de détails...
Wirginia Tomczak, Jean-Henry Ferrasse, Marie-Thérèse Giudici-Orticoni, Audrey Soric. Effect of hydraulic retention time on a continuous biohydrogen production in a packed bed biofilm reactor with recirculation flow of the liquid phase. International Journal of Hydrogen Energy, 2018, 43 (41), pp.18883-18895. ⟨10.1016/j.ijhydene.2018.08.094⟩. ⟨hal-02116035⟩ Plus de détails...
The present paper reports on results obtained from experiments carried out in a laboratory-scale anaerobic packed bed biofilm reactor (APBR), with recirculation of the liquid phase, for continuously biohydrogen production via dark fermentation. The reactor was filled with Kaldnes® biofilm carrier and inoculated with an anaerobic mesophilic sludge from a urban wastewater treatment plant (WWTP). The APBR was operated at a temperature of 37 °C, without pH buffering. The effect of theoretical hydraulic retention time (HRT) from 1 to 5 h on hydrogen yield (HY), hydrogen production rate (HPR), substrate conversion and metabolic pathways was investigated. This study indicates the possibility of enhancing hydrogen production by using APBR with recirculation flow. Among respondents values of HRT the highest average values of HY (2.35 mol H2/mol substrate) and HPR (0.085 L h−1L−1) have been obtained at HRT equal to 2 h.
Wirginia Tomczak, Jean-Henry Ferrasse, Marie-Thérèse Giudici-Orticoni, Audrey Soric. Effect of hydraulic retention time on a continuous biohydrogen production in a packed bed biofilm reactor with recirculation flow of the liquid phase. International Journal of Hydrogen Energy, 2018, 43 (41), pp.18883-18895. ⟨10.1016/j.ijhydene.2018.08.094⟩. ⟨hal-02116035⟩
Carlos Baqueiro, Nelson Ibaseta, Pierrette Guichardon, Laurent Falk. Influence of reagents choice (buffer, acid and inert salt) on triiodide production in the Villermaux–Dushman method applied to a stirred vessel. Chemical Engineering Research and Design, 2018, 136, pp.25-31. ⟨10.1016/j.cherd.2018.04.017⟩. ⟨hal-01771934⟩ Plus de détails...
This work studies how deeply the reagents choice influences micromixing characterisation by the Villermaux-Dushman method, when applying it to a 1 litre stainless steel standard vessel with two baffles, stirred by an inclined blade turbine. For the first time, borate and phosphate buffer are compared on their use in the method. It is observed that triiodide production is higher when borate buffer is used. Moreover, perchloric acid leads to higher triiodide production than sulphuric acid, when injecting the same concentration of both acids. Finally, the influence of the ionic strength is also studied, since there has been a great deal of controversy about it over the last years. The results show that the ionic strength affects triiodide production, although relatively slightly. Advice concerning the choice of the reagents is given in conclusion.
Carlos Baqueiro, Nelson Ibaseta, Pierrette Guichardon, Laurent Falk. Influence of reagents choice (buffer, acid and inert salt) on triiodide production in the Villermaux–Dushman method applied to a stirred vessel. Chemical Engineering Research and Design, 2018, 136, pp.25-31. ⟨10.1016/j.cherd.2018.04.017⟩. ⟨hal-01771934⟩
Hiba Souissi, Raphael Zory, Jonathan Bredin, Nicolas Roche, Pauline Gerus. Co-contraction around the knee and the ankle joints during post-stroke gait.. European Journal of Physical and Rehabilitation Medicine, 2018, 54 (3), pp.380-387. ⟨10.23736/S1973-9087.17.04722-0⟩. ⟨hal-02506559⟩ Plus de détails...
Impairments resulting from hemiparetic stroke lead to persistent difficulties with walking. Abnormal co-contraction patterns of lower limb muscles might be a compensatory mechanism to deal with its resulting gait impairments.
Hiba Souissi, Raphael Zory, Jonathan Bredin, Nicolas Roche, Pauline Gerus. Co-contraction around the knee and the ankle joints during post-stroke gait.. European Journal of Physical and Rehabilitation Medicine, 2018, 54 (3), pp.380-387. ⟨10.23736/S1973-9087.17.04722-0⟩. ⟨hal-02506559⟩
Journal: European Journal of Physical and Rehabilitation Medicine
Félicité Ondze, Jean-Henry Ferrasse, Olivier Boutin, Jean-Christophe Ruiz, Frédéric Charton. Process simulation and energetic analysis of different supercritical water gasification systems for the valorisation of biomass. Journal of Supercritical Fluids, 2018, 133, pp.114 - 121. ⟨10.1016/j.supflu.2017.10.002⟩. ⟨hal-02115423⟩ Plus de détails...
The energetic efficiency for the supercritical gasification of biomass is studied for three cases: hydrogen and methane production, heat and electricity cogeneration. Experimental results from the gasification of glucose are used to represent the gasifier. The other unit operations are simulated using the software ProsimPlus through thermodynamic equilibrium calculations. Simulations are conducted at different pressure, temperature and initial biomass concentration. The energetic and exergetic yields are calculated, as well as the minimum heat requirement estimated from a pinch analysis. All the results are then exploited to determine optimal conditions for two systems: adiabatic and isothermal.
Félicité Ondze, Jean-Henry Ferrasse, Olivier Boutin, Jean-Christophe Ruiz, Frédéric Charton. Process simulation and energetic analysis of different supercritical water gasification systems for the valorisation of biomass. Journal of Supercritical Fluids, 2018, 133, pp.114 - 121. ⟨10.1016/j.supflu.2017.10.002⟩. ⟨hal-02115423⟩
Olivier Lafforgue, Isabelle Seyssiecq, Sébastien Poncet, Julien Favier. Rheological properties of synthetic mucus for airway clearance. Journal of Biomedical Materials Research Part A, 2018, 106 (2), pp.386 - 396. ⟨10.1002/jbm.a.36251⟩. ⟨hal-01678912⟩ Plus de détails...
In this work, a complete rheological characterization of bronchial mucus simulants based on the composition proposed by Zahm et al. [1] is presented. Dynamic Small Amplitude Oscillatory Shear (SAOS) experiments, Steady State (SS) flow measurements and three Intervals Thixotropy Tests (3ITT), are carried out to investigate the global rheological complexities of simulants (viscoelasticity, viscoplasticity, shear-thinning and thixotropy) as a function of scleroglucan concentrations (0.5 to 2wt%) and under temperatures of 20 and 37 °C. SAOS measurements show that the limit of the linear viscoelastic range as well as the elasticity both increase with increasing sclerogucan concentrations. Depending on the sollicitation frequency, the 0.5wt% gel response is either liquid-like or solid-like, whereas more concentrated gels show a solid-like response over the whole frequency range. The temperature dependence of gels response is negligible in the 20-37°C range. The Herschel-Bulkley (HB) model is chosen to fit the SS flow curve of simulants. The evolution of HB parameters versus polymer concentration show that both shear-thinning and viscoplasticity increase with increasing concentrations. 3ITTs allow calculation of recovery thixotropic times after shearings at 100s-1 or 1.6s-1. Empiric correlations are proposed to quantify the effect of polymer concentration on rheological parameters of mucus simulants.
Olivier Lafforgue, Isabelle Seyssiecq, Sébastien Poncet, Julien Favier. Rheological properties of synthetic mucus for airway clearance. Journal of Biomedical Materials Research Part A, 2018, 106 (2), pp.386 - 396. ⟨10.1002/jbm.a.36251⟩. ⟨hal-01678912⟩
Journal: Journal of Biomedical Materials Research Part A
Cristian Barca, Stephane Troesch, Yves Andres, Florent Chazarenc, Nicolas Roche. Modelling hydrodynamics of horizontal flow steel slag filters designed to upgrade phosphorus removal in small wastewater treatment plants. Journal of Environmental Management, 2018, 206, pp.349-356. ⟨10.1016/j.jenvman.2017.10.040⟩. ⟨hal-02111630⟩ Plus de détails...
Steel slag filters, if well designed and operated, may upgrade phosphorus removal in small wastewater treatment plants such as stabilization ponds and constructed wetlands. The main objective of this study was to develop a systemic modelling approach to describe changes in the hydraulic performances and internal hydrodynamics of steel slag filters under real dynamic operating conditions. The experimental retention time distribution curves (RTD curves) determined from tracer experiments performed at different times during the first year of operation of two field-scale steel slag filters were analyzed through a three stage process. First, a statistical analysis of the RTD curves was performed to determine statistical parameters of the retention time distribution. Second, classical tanks in series (TIS) and plug flow with dispersion (PFD) models were used to obtain a first evaluation of the dispersion and mixing regime. Finally, a multi-flow path TIS model, based on the assumption of several flow paths with different hydraulic properties, is proposed to accurately describe the internal hydrodynamics. Overall, the results of this study indicate that higher CaO content, round shape, and larger grain size distribution of steel slag may promote plug-like flow rather than dispersion. The results of the multi-flow path TIS model suggest that the internal hydrodynamics of steel slag filters can be primarily described by two main flow paths: (i) a faster main flow path showing higher plug flow, followed by (ii) a slower secondary flow path showing higher dispersion. The results also showed that internal hydrodynamics may change over time as a consequence of physical-chemical phenomena occurring in the filter, including accumulation of precipitates, slag hydration and carbonation, and particle segregation.
Cristian Barca, Stephane Troesch, Yves Andres, Florent Chazarenc, Nicolas Roche. Modelling hydrodynamics of horizontal flow steel slag filters designed to upgrade phosphorus removal in small wastewater treatment plants. Journal of Environmental Management, 2018, 206, pp.349-356. ⟨10.1016/j.jenvman.2017.10.040⟩. ⟨hal-02111630⟩
Gustavo Lopes, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Effects of solute permeability on permeation and solute rejection in membrane filtration. Chemical Engineering and Technology, 2018, 41 (4), pp.788-797. ⟨10.1002/ceat.201700203⟩. ⟨hal-01681108⟩ Plus de détails...
Membrane solute permeability plays a role in the buildup of concentration polarization in pressure-driven crossflow filtration processes, and thus in the determination of the permeate flux, solute rejection, retentate flux and concentration. We numerically examine reverse-osmosis desalination with membranes of fixed solvent permeability, but of variable selectivity with respect to the solute. The study highlights an intricate coupling between retentate and filtrate properties. In particular, it reveals that, for given values of solute permeability and feed concentration, there is a maximum operating pressure that optimizes solute rejection regardless of the feed salinity. The conditions leading to this and to other peculiar behaviors for permeation fluxes and concentrations are identified.
Gustavo Lopes, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Effects of solute permeability on permeation and solute rejection in membrane filtration. Chemical Engineering and Technology, 2018, 41 (4), pp.788-797. ⟨10.1002/ceat.201700203⟩. ⟨hal-01681108⟩
N. Rizk, N. Ait-Mouheb, G. Bourrier, Bruno Molle, Nicolas Roche. Parameters controlling chemical deposits in micro-irrigation with treated wastewater. Journal of Water Supply: Research and Technology - AQUA, 2017, 66 (8), pp.587 - 597. ⟨10.2166/aqua.2017.065⟩. ⟨hal-01665983⟩ Plus de détails...
Micro-irrigation with treated wastewater has the potential to be the most efficient irrigation technique, especially in water scarce areas. Its main disadvantage is the high sensitivity of the drippers to clog. This study focused only on the chemical precipitation mechanisms. In a batch chemical process in parallel with PHREEQC software, two temperatures (22 and 55°C), four pH (8, 8.5, 9 and 9.5) and CO2 partial pressure were tested. The aim was to analyze the quantity of precipitates and their crystalline nature and calculate the effects of these factors on the behavior of dissolved chemical elements in treated wastewater to be able to validate and calibrate a geochemical software in order to predict chemical precipitation. The amount of precipitate increases by increasing pH and temperature. Precipitates were analyzed using thermo gravimetric analysis (TGA) and X-ray diffraction (XRD). Calcium carbonate (CaCO3) in the form of calcite was found to be the predominant precipitate. Experimental and model results showed that the saturation index (SI) of calcite was found to be the factor that most frequently affected calcite precipitation. Calcite SI is pH, temperature and CO2 partial pressure dependent. In the case of irrigation, water equilibrium with atmospheric CO2 minimizes precipitation of calcite.
N. Rizk, N. Ait-Mouheb, G. Bourrier, Bruno Molle, Nicolas Roche. Parameters controlling chemical deposits in micro-irrigation with treated wastewater. Journal of Water Supply: Research and Technology - AQUA, 2017, 66 (8), pp.587 - 597. ⟨10.2166/aqua.2017.065⟩. ⟨hal-01665983⟩
Journal: Journal of Water Supply: Research and Technology - AQUA
The effect of acidic conditions (in a pH range of 3 to 6) and temperature on the kinetics of the hydrothermal oxidation of ferrous iron contained in BOF steel slag has been tested in the 150–350 • C range for acid acetic concentrations from 0 to 4 M. Reaction progress was monitored with the amount of produced H 2. Higher temperature and lower pH are found to enhance the hydrothermal oxidation kinetics of the slag. These two parameters are believed to increase iron dissolution rate which has already been identified as the rate limiting step of the hydrothermal oxidation of pure FeO. An activation energy of 28 ± 4 kJ/mole is found for the hydrothermal oxidation of the steel slag which compares very well with that of pure FeO under similar conditions. In the case of the slag run in water at 300 • C for 70.5 h, magnetite product has been separated magnetically and characterized. Particles were found to fall in three size ranges: 10–30 nm, 100–300 nm, and 1–10 µm. The smallest fraction (10–30 nm) is comparable to the 10–20 nm size range that is achieved when nanomagnetite are synthesized by co-precipitation methods. Obviously, the production of nanomagnetite enhances the economic interest of the hydrothermal processing of steel slags, which has already proven its capacity to produce high-purity H 2 .
Camille Crouzet, Fabrice Brunet, Nadir Recham, Anne-Line Auzende, Nathaniel Findling, et al.. Hydrothermal Steel Slag Valorization—Part II: Hydrogen and Nano-Magnetite Production. Frontiers in Earth Science, 2017, 5, ⟨10.3389/feart.2017.00086⟩. ⟨hal-01678896⟩
Camille Crouzet, Fabrice Brunet, German Montes-Hernandez, Nadir Recham, Nathaniel Findling, et al.. Hydrothermal Valorization of Steel Slags—Part I: Coupled H2 Production and CO2 Mineral Sequestration. Frontiers in Energy Research, 2017, 5, ⟨10.3389/fenrg.2017.00029⟩. ⟨hal-01678886⟩ Plus de détails...
A new process route for the valorization of BOF steel slags combining H2 production and CO2 mineral sequestration is investigated at 300°C (HT) under hydrothermal conditions. A BOF steel slag stored several weeks outdoor on the production site was used as starting material. To serve as a reference, room temperature (RT) carbonation of the same BOF steel slag has been monitored with in situ Raman spectroscopy and by measuring pH and PCO2 on a time-resolved basis. CO2 uptake under RT and HT are, respectively, 243 and 327 kg CO2/t of fresh steel slag, which add up with the 63 kg of atmospheric CO2 per ton already uptaken by the starting steel slag on the storage site. The CO2 gained by the sample at HT is bounded to the carbonation of brownmillerite. H2 yield decreased by about 30% in comparison to the same experiment performed without added CO2, due to sequestration of ferrous iron in a Mg-rich siderite phase. Ferric iron, initially present in brownmillerite, is partitioned between an Fe-rich clay mineral of saponite type and metastable hematite. Saponite is likely stabilized by the presence of Al, whereas hematite may represent a metastable product of brown-millerite carbonation. Mg-rich wüstite is involved in at least two competing reactions, i.e., oxidation into magnetite and carbonation into siderite. Results of both water-slag and water-CO2-slag experiments after 72 h are consistent with a kinetics enhancement of the former reaction when a CO2 partial pressure imposes a pH between 5 and 6. Three possible valorization routes, (1) RT carbonation prior to hydrothermal oxidation, (2) RT carbonation after hydrothermal treatment, and (3) combined HT carbonation and oxidation are discussed in light of the present results and literature data.
Camille Crouzet, Fabrice Brunet, German Montes-Hernandez, Nadir Recham, Nathaniel Findling, et al.. Hydrothermal Valorization of Steel Slags—Part I: Coupled H2 Production and CO2 Mineral Sequestration. Frontiers in Energy Research, 2017, 5, ⟨10.3389/fenrg.2017.00029⟩. ⟨hal-01678886⟩
Olivier Lafforgue, N. Bouguerra, Sebastien Poncet, Isabelle Seyssiecq, Julien Favier, et al.. Thermo-physical properties of synthetic mucus for the study of airway clearance. Journal of Biomedical Materials Research Part A, 2017, 105 (11), pp.3025-3033 ⟨10.1002/jbm.a.36161⟩. ⟨hal-01596484⟩ Plus de détails...
In this article, dynamic viscosity, surface tension, density, heat capacity and thermal conductivity, of a bronchial mucus simulant proposed by Zahm et al., Eur Respir J 1991; 4: 311–315 were experiementally determined. This simulant is mainly composed of a galactomannan gum and a scleroglucan. It was shown that thermophysical properties of synthetic mucus are dependant of scleroglucan concentrations. More importantly and for some scleroglucan concentrations, the syntetic mucus, exhibits, somehow, comparable thermophysical properties to real bronchial mucus. An insight on the microstructure of this simulant is proposed and the different properties enounced previously have been measured for various scleroglucan concentrations and over a certain range of operating temperatures. This synthetic mucus is found to mimic well the rheological behavior and the surface tension of real mucus for different pathologies. Density and thermal properties have been measured for the first time.
Olivier Lafforgue, N. Bouguerra, Sebastien Poncet, Isabelle Seyssiecq, Julien Favier, et al.. Thermo-physical properties of synthetic mucus for the study of airway clearance. Journal of Biomedical Materials Research Part A, 2017, 105 (11), pp.3025-3033 ⟨10.1002/jbm.a.36161⟩. ⟨hal-01596484⟩
Journal: Journal of Biomedical Materials Research Part A
Antoine Leybros, Laurence Hung, Audrey Hertz, Didier Hartmann, Agnès Grandjean, et al.. Supercritical CO 2 extraction of uranium from natural ore using organophosphorus extractants. Chemical Engineering Journal, 2017, 316, pp.196 - 203. ⟨10.1016/j.cej.2017.01.101⟩. ⟨hal-01583524⟩ Plus de détails...
The feasibility of extracting uranium from natural ores has been studied, using supercritical CO2 and either commercial extractants (PC88A, Cyanex 301®) or an amidophosphonate molecule (named DEHCNPB). The impact of the process parameters has been evaluated. The uranium extraction yield was optimal at the lowest temperature (40 °C) and highest pressure (25 MPa) tested here. For a given CO2 flow rate, a compromise should be established between the amounts of extractant, acid and oxidant used. Uranium was successfully extracted directly from natural ore using DEHCNPB with a good selectivity over metal impurities such as iron, titanium and vanadium and yields up to 97%. Moreover, using Fe2(SO4)3 as an oxidant allows to minimize the water usage of the process. The mechanism of extraction using supercritical CO2 has been elucidated thanks to electrospray ionization mass spectrometry.
Antoine Leybros, Laurence Hung, Audrey Hertz, Didier Hartmann, Agnès Grandjean, et al.. Supercritical CO 2 extraction of uranium from natural ore using organophosphorus extractants. Chemical Engineering Journal, 2017, 316, pp.196 - 203. ⟨10.1016/j.cej.2017.01.101⟩. ⟨hal-01583524⟩
Camille Grandclement, Isabelle Seyssiecq, Anne Piram, Pascal Wong-Wah-Chung, Guillaume Vanot, et al.. From the conventional biological wastewater treatment to hybrid processes, the evaluation of organic micropollutant removal: A review. Water Research, 2017, 111, pp.297-317. ⟨10.1016/j.watres.2017.01.005⟩. ⟨hal-01456484⟩ Plus de détails...
Because of the recalcitrance of some micropollutants to conventional wastewater treatment systems, the occurrence of organic micropollutants in water has become a worldwide issue, and an increasing environmental concern. Their biodegradation during wastewater treatments could be an interesting and low cost alternative to conventional physical and chemical processes. This paper provides a review of the organic micropollutants removal efficiency from wastewaters. It analyses different biological processes, from conventional ones, to new hybrid ones. Micropollutant removals appear to be compound-and process-dependent, for all investigated processes. The influence of the main physico-chemical parameters is discussed, as well as the removal efficiency of different microorganisms such as bacteria or white rot fungi, and the role of their specific enzymes. Even though some hybrid processes show promising micropollutant removals, further studies are needed to optimize these water treatment processes, in particular in terms of technical and economical competitiveness.
Camille Grandclement, Isabelle Seyssiecq, Anne Piram, Pascal Wong-Wah-Chung, Guillaume Vanot, et al.. From the conventional biological wastewater treatment to hybrid processes, the evaluation of organic micropollutant removal: A review. Water Research, 2017, 111, pp.297-317. ⟨10.1016/j.watres.2017.01.005⟩. ⟨hal-01456484⟩
B. Bernales, Pierre Haldenwang, Pierrette Guichardon, Nelson Ibaseta. Prandtl model for concentration polarization and osmotic counter-effects in a 2-D membrane channel. Desalination, 2017, 404, pp.341 - 359. ⟨10.1016/j.desal.2016.09.026⟩. ⟨hal-01405589⟩ Plus de détails...
An accurate 2-D numerical model that accounts for concentration polarization and osmotic effects is developed for the cross-flow filtration in a membrane channel. Focused on the coupling between laminar hydrodynam-ics and mass transfer, the numerical approach solves the solute conservation equation together with the steady Navier-Stokes equations under the Prandtl approximation, which offers a simplified framework to enforce the non-linear coupling between filtration and concentration polarization at the membrane surface. The present approach is first validated thanks to the comparison with classical exact analytical solutions for hydrodynamics and/or mass transfer, as well as with approximated analytical solutions that attempted at coupling the various phenomena. The effects of the main parameters in cross-flow reverse osmosis (RO) or nanofiltration (NF) (feed concentration, axial flow rate, operating pressure and membrane permeability) on streamlines, velocity profile, longitudinal pressure drop, local permeate flux and solute concentration profile are predicted with the present numerical model, and discussed. With the use of data reported from NF and RO experiments, the Prandtl approximation model is shown to accurately correlate both average permeate flux and local solute concentration over a wide range of operating conditions.
B. Bernales, Pierre Haldenwang, Pierrette Guichardon, Nelson Ibaseta. Prandtl model for concentration polarization and osmotic counter-effects in a 2-D membrane channel. Desalination, 2017, 404, pp.341 - 359. ⟨10.1016/j.desal.2016.09.026⟩. ⟨hal-01405589⟩
Martine Poux, Nicolas Roche. Selected Papers from the 10th European Congress of Chemical Engineering – ECCE10 – Nice, France. Canadian Journal of Chemical Engineering, 2017, 95 (2), pp.207. ⟨10.1002/cjce.22685⟩. ⟨hal-01456497⟩ Plus de détails...
Biochemical Engineering Sciences (ESBES). Approximately 1800 people from all around the world (67 nationalities) attended the conference. The participation of industrialists (25 %) and students (31 %) was remarkable. The scientific program was impressive, being composed of 5 symposia, 4 workshops, 6 plenary lectures, 82 keynotes, and more than 700 oral communications organized in 202 sessions and 900 poster communications. These covered vast chemical and biochemical engineering topics, which reflected the latest scientific trends in their field and several special issues of different peer-reviewed journals will be published.
Martine Poux, Nicolas Roche. Selected Papers from the 10th European Congress of Chemical Engineering – ECCE10 – Nice, France. Canadian Journal of Chemical Engineering, 2017, 95 (2), pp.207. ⟨10.1002/cjce.22685⟩. ⟨hal-01456497⟩
Martine Poux, Nicolas Roche. Selected papers from the 10 th European Congress of Chemical Engineering - ECCE10 - Nice, France. Canadian Journal of Chemical Engineering, 2017, 95 (2), pp.207-207. ⟨10.1002/cjce.22685⟩. ⟨hal-02120055⟩ Plus de détails...
The 10th European Congress of Chemical Engineering (ECCE10) was held in conjunction with the 3rd European Congress of Applied Biotechnology (ECAB3) and the 5th EPIC European Process Intensification Conference (EPIC5) in Nice, France, from September 27th to October 1st, 2015. These events were organized by the French Society of Chemical Engineering (SFGP) under the auspice of the European Federation of Chemical Engineering (EFCE) and the European Society of Biochemical Engineering Sciences (ESBES).
Martine Poux, Nicolas Roche. Selected papers from the 10 th European Congress of Chemical Engineering - ECCE10 - Nice, France. Canadian Journal of Chemical Engineering, 2017, 95 (2), pp.207-207. ⟨10.1002/cjce.22685⟩. ⟨hal-02120055⟩
Djida Tafoukt, Audrey Soric, Jean-Claude J.-C. Sigoillot, Jean-Henry Ferrasse. Determination of kinetics and heat of hydrolysis for non homogenous substrate by isothermal calorimetry. Bioprocess and Biosystems Engineering, 2017, 40 (4), pp.1-8. ⟨10.1007/s00449-016-1728-0⟩. ⟨hal-01468071⟩ Plus de détails...
The competitiveness of the second-generation bioethanol by biotechnological process requires an effective and quantitative control of biochemical reactions. In this study, the potential of isothermal calorimetry technique to measure heat and kinetics of a non-homogeneous substrate enzymatic hydrolysis is intended. Using this technique, optimum temperature of the enzymes used for lignocellulosic molecules hydrolysis was determined. Thus, the amount of substrate-to-enzyme ratio was highlighted as an important parameter of the hydrolysis yield. Furthermore, a new enzymes' cocktail efficiency consisting of a mix of cellulases and cellobiose dehydrogenase (CDH) was qualified by this technique. The results showed that this cocktail allowed the production of a high amount of gluconic acid that could improve the attractiveness of these second-generation biofuels. From the set of experiments, the hydrolysis heat of wheat straw was derived and a meaningful value of -32.2 +/- 3.2 J g(-1) (gram reducing sugars product) is calculated. Then, isothermal measurements were used to determine kinetic constants of the cellulases and CDH mix on wheat straw. Results showed that this enzyme cocktail has an optimal rate at 45 A degrees C in the range of temperatures tested (40-55 A degrees C).
Djida Tafoukt, Audrey Soric, Jean-Claude J.-C. Sigoillot, Jean-Henry Ferrasse. Determination of kinetics and heat of hydrolysis for non homogenous substrate by isothermal calorimetry. Bioprocess and Biosystems Engineering, 2017, 40 (4), pp.1-8. ⟨10.1007/s00449-016-1728-0⟩. ⟨hal-01468071⟩
M. Rozenkevich, Yu. Pak, S. Marunich, A. Bukin, A. Ivanova, et al.. Main Features of the Technology for Air Detritiation in Scrubber Column. Fusion Science and Technology, 2017, 70 (3), pp.435-447. ⟨10.13182/FST15-153⟩. ⟨hal-01518911⟩ Plus de détails...
This paper examines the main features of the gas purification process from tritiated water vapor at any relative humidity using water phase isotope exchange. The experimentally evaluated overall mass transfer coefficient (KOG) for structured CY black packing manufactured by SULZER Chemtech (Switzerland) was used as the main performance parameter of the method. The obtained KOG dependencies on various process parameters (temperature, water and gas flows, and their ratio) demonstrate that column operation in adiabatic mode is preferable for the detritiation of gas at any relative humidity. Under comparable conditions, KOG does not depend on the column diameter in the investigated range. A comparison of the main characteristics of the developed technology with those of the technology based on water vapor adsorption on molecular sieves shows clear advantages in terms of energy, operating cost, and detritiation degree with the same amount of tritiated water produced as a radioactive waste.
M. Rozenkevich, Yu. Pak, S. Marunich, A. Bukin, A. Ivanova, et al.. Main Features of the Technology for Air Detritiation in Scrubber Column. Fusion Science and Technology, 2017, 70 (3), pp.435-447. ⟨10.13182/FST15-153⟩. ⟨hal-01518911⟩
Marine Minière, Olivier Boutin, Audrey Soric. Experimental coupling and modelling of wet air oxidation and packed-bed biofilm reactor as an enhanced phenol removal technology. Environmental Science and Pollution Research, 2017, 24 (8), pp.7693-7704. ⟨10.1007/s11356-017-8435-5⟩. ⟨hal-01629950⟩ Plus de détails...
Experimental coupling of wet air oxidation process and aerobic packed-bed biofilm reactor is presented. It has been tested on phenol as a model refractory compound. At 30 MPa and 250 °C, wet air oxidation batch experiments led to a phenol degradation of 97% and a total organic carbon removal of 84%. This total organic carbon was mainly due to acetic acid. To study the interest of coupling processes, wet air oxidation effluent was treated in a biological treatment process. This step was made up of two packed-bed biofilm reactors in series: the first one acclimated to phenol and the second one to acetic acid. After biological treatment, phenol and total organic carbon removal was 99 and 97% respectively. Thanks to parameters from literature, previous studies (kinetic and thermodynamic) and experimental data from this work (hydrodynamic parameters and biomass characteristics), both treatment steps were modelled. This modelling allows the simulation of the coupling process. Experimental results were finally well reproduced by the continuous coupled process model: relative error on phenol removal efficiency was 1 and 5.5% for wet air oxidation process and packed-bed biofilm reactor respectively.
Marine Minière, Olivier Boutin, Audrey Soric. Experimental coupling and modelling of wet air oxidation and packed-bed biofilm reactor as an enhanced phenol removal technology. Environmental Science and Pollution Research, 2017, 24 (8), pp.7693-7704. ⟨10.1007/s11356-017-8435-5⟩. ⟨hal-01629950⟩
Journal: Environmental Science and Pollution Research
Victor S Ruys, Kamel S Zerari, Isabelle S Seyssiecq, Nicolas Roche. Study of Carbonaceous and Nitrogenous Pollutant Removal Efficiencies in a Hybrid Membrane Bioreactor. Journal of Chemistry , 2017, 2017, pp.1 - 7. ⟨10.1155/2017/4080847⟩. ⟨hal-01536019⟩ Plus de détails...
A hybrid membrane bioreactor (HMBR) comprises activated sludge (free biomass), a biofilm (supported biomass), and a membrane separation. A laboratory pilot-scale HMBR was operated for seven months with high organic loads of both carbonic and nitrogen pollutants. Several experiments were conducted to investigate the influence of the height of the packing bed (27 cm, 50 cm, and 0 cm) and the effect of the concentration of dissolved oxygen (DO) on the organic removal rate, total nitrogen removal rate (TN), and ammonium removal. The organic removal rate was always >95% and mostly >98%. The NH 4 +-N and TN removal rates were directly related to DO. NH 4 +-N removal rate reached 100% and was mostly >99% with a concentration of DO > 0.1 mg/L, whereas the NO 3 −-N removal rate was differentially affected depending on the level of DO. The removal rate increased when the concentration of DO was optimal for simultaneous nitrification and denitrification, which was between 0.1 and 0.5 mg/l, and the TN removal rate was consequently high. The removal rate decreased when DO was high and denitrification was consequently low thereby reducing the TN removal rate. This implies that high levels of DO (>1 mg/L) limit the denitrification process and low levels of DO (<0.1 mg/L) limit the nitrification process and hence total nitrogen removal in the bioreactor.
Victor S Ruys, Kamel S Zerari, Isabelle S Seyssiecq, Nicolas Roche. Study of Carbonaceous and Nitrogenous Pollutant Removal Efficiencies in a Hybrid Membrane Bioreactor. Journal of Chemistry , 2017, 2017, pp.1 - 7. ⟨10.1155/2017/4080847⟩. ⟨hal-01536019⟩
Jean-Charles de Hemptinne, Jean-Henry Ferrasse, A. Gorak, Signe Kjelstrup, F. Maréchal, et al.. Energy efficiency as an example of cross-discipline collaboration in chemical engineering. Chemical Engineering Research and Design, 2017, 119, pp. 183-187. ⟨10.1016/j.cherd.2017.01.020⟩. ⟨hal-01519871⟩ Plus de détails...
This paper summarizes the round-table discussion that was held during the EuropeanCongress of Chemical Engineering (ECCE) in Nice, France, in October 2015 on this topic.The panellists come from different fields of chemical engineering and have thus broughtin different perspectives. The objective was to determine paths for developing innovativeapproaches in view of process optimization.The terminology is a first obstacle that was clarified. Energy efficiency can be envisagedeither by optimizing thermodynamic functions (entropy or exergy), more pragmatically byselecting the adequate unit operation or in a very general vision by considering all decisionvariables (i.e. including economic and political) that may have an impact on the final serviceprovided to society.The second issue relates to improving collaboration among various actors. These may bedefined in terms of type of responsibility (industrials, mostly market-driven, or academic),or in terms of discipline. The role of professional societies as the European Federation forChemical Engineers (EFCE) is stressed as a promotor of collaboration between disciplines.Finally, once willingness for collaboration is identified, the final question is how it can leadto true innovation. The largest innovation potential is often found at the interface betweenfields. Yet, it often requires both an effort to explain the mutual challenges in a didacticmanner, and the development of tools that make it possible to each partner to be efficientin his own field while being aware of the global goal and of the constraints of the others.
Jean-Charles de Hemptinne, Jean-Henry Ferrasse, A. Gorak, Signe Kjelstrup, F. Maréchal, et al.. Energy efficiency as an example of cross-discipline collaboration in chemical engineering. Chemical Engineering Research and Design, 2017, 119, pp. 183-187. ⟨10.1016/j.cherd.2017.01.020⟩. ⟨hal-01519871⟩
Cristian Barca, David Ranava, Marielle Bauzan, Jean-Henry Ferrasse, Marie-Thérèse Giudici-Orticoni, et al.. Fermentative hydrogen production in an up-flow anaerobic biofilm reactor inoculated with a co-culture of Clostridium acetobutylicum and Desulfovibrio vulgaris. Bioresource Technology, 2016, Bioresource Technology, 221, pp.Pages 526-533. ⟨10.1016/j.biortech.2016.09.072⟩. ⟨hal-01415833⟩ Plus de détails...
Dark fermentation systems often show low H2 yields and unstable H2 production, as the result of the variability of microbial dynamics and metabolic pathways. Recent batch investigations have demonstrated that an artificial consortium of two anaerobic bacteria, Clostridium acetobutylicum and Desulfovibrio vulgaris Hildenborough, may redirect metabolic fluxes and improve H2 yields. This study aimed at evaluating the scale-up from batch to continuous H2 production in an up-flow anaerobic packed-bed reactor (APBR) continuously fed with a glucose-medium. The effects of various parameters, including void hydraulic retention time (HRTv), pH, and alkalinity, on H2 production performances and metabolic pathways were investigated. The results demonstrated that a stable H2 production was reached after 3–4 days of operation. H2 production rates increased significantly with decreasing HRTv from 4 to 2 h. Instead, H2 yields remained almost stable despite the change in HRTv, indicating that the decrease in HRTv did not affect the global metabolism.
Cristian Barca, David Ranava, Marielle Bauzan, Jean-Henry Ferrasse, Marie-Thérèse Giudici-Orticoni, et al.. Fermentative hydrogen production in an up-flow anaerobic biofilm reactor inoculated with a co-culture of Clostridium acetobutylicum and Desulfovibrio vulgaris. Bioresource Technology, 2016, Bioresource Technology, 221, pp.Pages 526-533. ⟨10.1016/j.biortech.2016.09.072⟩. ⟨hal-01415833⟩
Martine Poux, Nicolas Roche. Chemical and biochemical engineering for a new sustainable process industry in Europe. Chemical Engineering Research and Design, 2016, Chemical Engineering Research and Design, 115 (Part B ), pp.261. ⟨10.1016/j.cherd.2016.10.037⟩. ⟨hal-01458420⟩ Plus de détails...
The very title itself was the slogan of the main scientific event in Chemical Engineering in Europe, held in Nice in September 2015, which combined the 10th European Congress of Chemical Engineering (ECCE10), the 3rd European Congress of Applied Biotechnology (ECAB3) and the 5th European Process Intensification Conference (EPIC5). These events were organised by the French Society of Chemical Engineering (SFGP) and Live! By GL under the auspices of the European Federation of Chemical Engineering (EFCE) and the European Society of Biochemical Engineering Sciences (ESBES). The conference focused on four main societal challenges: - Energy: new and unconventional resources, conservation and management - Water management and treatment - Biotechnology and food - Industrial ecosystems and addressed fundamental chemical and biochemical engineering research.
Martine Poux, Nicolas Roche. Chemical and biochemical engineering for a new sustainable process industry in Europe. Chemical Engineering Research and Design, 2016, Chemical Engineering Research and Design, 115 (Part B ), pp.261. ⟨10.1016/j.cherd.2016.10.037⟩. ⟨hal-01458420⟩
Olivier Fabbris, Saied Dardour, Patrick Blaise, Jean-Henry Ferrasse, Manuel Saez. Surrogates based multi-criteria predesign methodology of Sodium-cooled Fast Reactor cores - Application to CFV-like cores. Nuclear Engineering and Design, 2016, 305, pp.314-333. ⟨10.1016/j.nucengdes.2016.05.021⟩. ⟨hal-01461795⟩ Plus de détails...
The Sodium-cooled Fast Reactor (SFR) core predesign process is commonly realized on the basis of expert advices and local parametric studies. As such, in-deep knowledge of physical phenomena avoids an important number of expensive simulations. However, the study space is explored only partially. To ease the computational burden metamodels, or surrogate models, can be used, to quickly evaluate the performances of a wide set of different cores, individually defined by a set of parameters (pellet diameter, fissile height...), in the study space. This paper presents the development of a simplified neutronics ERANOS reference core calculation scheme that is then implemented in the construction of the Design of Experiment (DOE) database. The surrogate models for SFR CFV-like cores performances are developed, biases and uncertainties are quantified against the CFV-v1 version. Global Sensitivity Analysis also allowed highlighting antagonist performances for the design and to propose two alternative core configurations. A broadened application of the method with an optimization of a CFV-like core is also detailed. The Pareto front of the seven selected performance parameters has been studied using eleven surrogate models, based on Artificial Neural Network (ANN). The optimization demonstrates that the CFV-v1, designed using Best Estimate codes, under given performance constraints, is Pareto optimal: no other configuration is highlighted from the Multi-Objective Optimization (MOO) study. Further MOO analysis, including a specific study on impact of new degrees of freedom, such as five Pu enrichments compared to two, or different pellet diameters have been performed. Additional configurations are then found by the surrogate models, improving simultaneously all performances of the CFV-v1 configuration. (C) 2016 Elsevier B.V. All rights reserved.
Olivier Fabbris, Saied Dardour, Patrick Blaise, Jean-Henry Ferrasse, Manuel Saez. Surrogates based multi-criteria predesign methodology of Sodium-cooled Fast Reactor cores - Application to CFV-like cores. Nuclear Engineering and Design, 2016, 305, pp.314-333. ⟨10.1016/j.nucengdes.2016.05.021⟩. ⟨hal-01461795⟩
Jadwiga Wedzicha, Donald Banerji, Kenneth Chapman, Jorgen Vestbo, Nicolas Roche, et al.. Indacaterol–Glycopyrronium versus Salmeterol–Fluticasone for COPD. New England Journal of Medicine, 2016, 374 (23), pp.2222 - 2234. ⟨10.1056/NEJMoa1516385⟩. ⟨hal-01872709⟩ Plus de détails...
Jadwiga Wedzicha, Donald Banerji, Kenneth Chapman, Jorgen Vestbo, Nicolas Roche, et al.. Indacaterol–Glycopyrronium versus Salmeterol–Fluticasone for COPD. New England Journal of Medicine, 2016, 374 (23), pp.2222 - 2234. ⟨10.1056/NEJMoa1516385⟩. ⟨hal-01872709⟩
Gustavo H. Lopes, Nelson Ibaseta, Pierrette Guichardon. How can osmosis and solute diffusion be coupled for the simultaneous measurement of the solvent and solute permeabilities of membranes?. Desalination, 2016, 387 (1), pp.61-74. ⟨10.1016/j.desal.2016.03.006⟩. ⟨hal-01290973⟩ Plus de détails...
A novel experimental method and its associated model are proposed for the simultaneous determination of membrane solute and solvent permeabilities, which are essential transport parameters of reverse osmosis models used for process simulation. The method utilizes a single bench-scale batch apparatus consisting of two stirred half-cells containing solutions of different concentrations separated by a membrane across which coupled non-steady-state solute diffusion and solvent osmosis take place countercurrently in the absence of transmembrane pressure difference. Results are presented from days-long determinations of the water and sodium chloride permeabilities of Filmtec BW30 and NF270 membrane samples for initial transmembrane salt concentration differences ranging from 1 g L-1 to 35 g L-1. When used as input parameters for the simulation of pilot reverse osmosis desalination tests, the osmotic-diffusive salt permeabilities approximated the experimental rejection rates.
Gustavo H. Lopes, Nelson Ibaseta, Pierrette Guichardon. How can osmosis and solute diffusion be coupled for the simultaneous measurement of the solvent and solute permeabilities of membranes?. Desalination, 2016, 387 (1), pp.61-74. ⟨10.1016/j.desal.2016.03.006⟩. ⟨hal-01290973⟩
The development of environmental-friendly process for strategic metal extraction, limiting organic solvent use and effluent production, appears to be quite a challenging purpose. Production of pure molybdenum using supercritical CO2 extraction process, from sulfuric solution obtained by ore or used catalyst leaching, has been evaluated. Two organic ligands, trioctylamine and 2-ethylhexyl 2-ethylhexylphosphonic acid, were studied to extract Mo as metal complexes solubilized in supercritical CO2. Extraction with trioctylamine revealed to be non-efficient due to a lack of Mo-trioctylamine complex solubility in CO2, even if extraction selectivity of molybdenum versus iron impurity was interesting. On the contrary, extraction with 2-ethylhexyl 2-ethylhexylphosphonic acid leads to high Mo collection efficiency (up to 90% in 7 h). However, no selectivity was observed between molybdenum and zirconium. The selectivity of 2-ethylhexyl 2-ethylhexylphosphonic acid towards molybdenum in presence of iron was better but clearly decreased in presence of zirconium.
Laurence Hung, Audrey Hertz, Didier Hartmann, Frédéric Charton, Olivier Boutin. Supercritical CO2 extraction of molybdenum-ligand complexes from sulfuric solutions. Journal of Supercritical Fluids, 2016, 111, pp.97-103. ⟨10.1016/j.supflu.2016.01.017⟩. ⟨hal-01297659⟩
Salah Akkache, Ana-Belen Hernandez, Gabriel Teixeira, Franck Gelix, Nicolas Roche, et al.. Co-gasification of wastewater sludge and different feedstock: Feasibility study. Biomass and Bioenergy, 2016, 89, pp.201 - 209. ⟨10.1016/j.biombioe.2016.03.003⟩. ⟨hal-01458422⟩ Plus de détails...
Gasification experiments were performed for several feedstocks alone (wastewater sludge, waste wood, reeds, olive pomace, solid recovered fuel, paper labels and plastic labels) using a fixed bed reactor operating in semi-batch conditions. In order to combine them in an optimal gasifying blend, the gasification behavior of each feedstock was compared with that of wastewater sludge through the following criteria: the raw feedstock proximate and ultimate composition, the solid conversion, the gas heating value, the pollutants release and the ashes melting. Operated alone, the conversion rate of the feedstocks after 58 min of solid residence time was over 77% of initial mass. The Syngas low heating value produced at 1123 K was in the range of 9.0 to 11.9 MJ m À3. The major concerns regarding the wastewater sludge were the pollutants precursors' release (NH 3 , COS…) and the ash slagging and fouling. The calculated slagging and fouling indexes were high also for olive pomace and for waste wood. Finally, among the possible blends studied the paper labels and plastic labels can be co-gasified with secondary and digested wastewater sludge without any restriction, reeds and solid recovered fuel can be blinded with secondary wastewater sludge without any restriction, a specific attention have to be taken to fouling when they are blended with digested wastewater sludge. The blend based on waste wood and olives pomace should be avoided for instance due to their ash slagging and fouling tendency.
Salah Akkache, Ana-Belen Hernandez, Gabriel Teixeira, Franck Gelix, Nicolas Roche, et al.. Co-gasification of wastewater sludge and different feedstock: Feasibility study. Biomass and Bioenergy, 2016, 89, pp.201 - 209. ⟨10.1016/j.biombioe.2016.03.003⟩. ⟨hal-01458422⟩
Antoine Leybros, Agnès Grandjean, Nathalie Segond, Marc Messalier, Olivier Boutin. Cesium removal from contaminated sand by supercritical CO2 extraction. Journal of Environmental Chemical Engineering, 2016, 4 (1), pp.1076-1080. ⟨10.1016/j.jece.2016.01.009⟩. ⟨hal-01300394⟩ Plus de détails...
Supercritical CO2 extraction is a promising process among existing decontamination methods. Feasibility of supercritical CO2 extraction processing for decontamination of contaminated soils has been studied with non-radioactive cesium as contaminant. Extractant system considered was a mixture of DB18C6 crown ether and HPFOA that gave a synergistic effect when combined. Process parameters influence such as operating pressure (25–29 MPa) and temperature (40–80 °C), initial cesium/extractant/cationic exchanger amounts (molar ratio between 1/12/12 and 1/100/100) and soil moisture (0–6%wt) has been tested. Low temperature (40 °C) and high pressure (29 MPa) allow to optimize process ability for cesium removal. A compromise should be established, for a fixed CO2 flow rate, between amounts of extractants and cationic exchangers. Efficiency of cesium removal seems to be optimized at 3%wt matrix moisture. Extraction from sand is successful with yields up to 95%.
Antoine Leybros, Agnès Grandjean, Nathalie Segond, Marc Messalier, Olivier Boutin. Cesium removal from contaminated sand by supercritical CO2 extraction. Journal of Environmental Chemical Engineering, 2016, 4 (1), pp.1076-1080. ⟨10.1016/j.jece.2016.01.009⟩. ⟨hal-01300394⟩
Journal: Journal of Environmental Chemical Engineering
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, Mark Tothill, et al.. An approach for establishing the performance maps of the sc-CO2 compressor: Development and qualification by means of CFD simulations. International Journal of Heat and Fluid Flow, 2016, 61 (Part B), pp.379-394. ⟨10.1016/j.ijheatfluidflow.2016.05.017⟩. ⟨hal-01461787⟩ Plus de détails...
One of the challenges in the performance prediction of the supercritical CO2 (sc-CO2) compressor is the real gas behavior of the working fluid near the critical point. This study deals with the establishment of an approach that allows coping with this particularity by dressing compressor performance maps in adequate reduced coordinates (i.e., suitable dimensionless speed and flow parameters inputs and pressure ratio and enthalpy rise outputs), while using CFD for its validation. Two centrifugal compressor designs have been considered in this work. The first one corresponds to a 6 kW small scale component implemented in a test loop at Tokyo Institute of Technology. The second one corresponds to a 38 MW scale 1:1 design considered at an early stage of a project that investigates sc-CO2 cycle for a Small Modular Reactor application. Numerical results on the former have been successfully confronted with the experimental data to qualify the ability of CFD to provide a performance database. Results on the latter have revealed a significant decrease in the static temperature and pressure during flow acceleration along the leading edge of the impeller blades. In this line, the increased risk of vapor pockets appearance inside a sc-CO2 compressor has been highlighted and recommendations regarding the choice of the on-design inlet conditions and the compressor design have been given to overcome this concern. CFD results on the scale 1:1 compressor have then been used to evaluate the relevancy of some previous performance maps approaches for a sc-CO2 compressor application. These include the conventional approach for ideal gas and its derivation, as well as a reference approach from the literature that was previously applied to model a sc-CO2 test compressor. As the dimensionless parameters of these approaches are found to yield discrepancies on the compressor performance, a revised approach that incorporates real gas formulations into turbomachinery key similarity parameters has been finally proposed. In support, an extensive number of CFD case studies has been carried out at various compressor inlet conditions, providing numerical results for its qualification. Accordingly, the proposed approach has been found to succeed in consistently representing and accurately predicting the sc-CO2 compressor performance over a wide operating range.
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, Mark Tothill, et al.. An approach for establishing the performance maps of the sc-CO2 compressor: Development and qualification by means of CFD simulations. International Journal of Heat and Fluid Flow, 2016, 61 (Part B), pp.379-394. ⟨10.1016/j.ijheatfluidflow.2016.05.017⟩. ⟨hal-01461787⟩
Journal: International Journal of Heat and Fluid Flow
S. Gamri, A. Soric, Séverine Tomas, Bruno Molle, Nicolas Roche. Effects of pipe materials on biofouling under controlled hydrodynamic conditions. Journal of Water Reuse and Desalination, 2016, 6 (1), pp.167-174. ⟨10.2166/wrd.2015.037⟩. ⟨hal-01665987⟩ Plus de détails...
Experiments were carried out to investigate pipe material impacts on biofouling, at high effluent concentration levels and under controlled hydrodynamic conditions. Two velocities (0.4 and 0.8 m s-1) were used to monitor biofilm growth on polyethylene (PE) and polyvinylchloride (PVC) pipe walls, respectively. These conditions were established based on wastewater irrigation practices. A decrease in biomass is observed after 49 days of experiments for both velocities and may be related to biofilm detachment. Biofilm growth is greater at 0.8 m s-1. For both velocities, PVC is less sensitive to biofilm growth than PE. Pipe straightness plays a primary role in biofilm growth control. This effect is more significant than pipe surface characteristics (roughness, hydrophobic/hydrophilic properties).
S. Gamri, A. Soric, Séverine Tomas, Bruno Molle, Nicolas Roche. Effects of pipe materials on biofouling under controlled hydrodynamic conditions. Journal of Water Reuse and Desalination, 2016, 6 (1), pp.167-174. ⟨10.2166/wrd.2015.037⟩. ⟨hal-01665987⟩
Hong-Son Pham, Nicolas Alpy, S. Mensah, Mark Tothill, Jean-Henry Ferrasse, et al.. A numerical study of cavitation and bubble dynamics in liquid CO2 near the critical point. International Journal of Heat and Mass Transfer, 2016, 102, pp.174-185. ⟨10.1016/j.ijheatmasstransfer.2016.06.005⟩. ⟨hal-01461785⟩ Plus de détails...
This study aims to provide insights into the cavitation and bubble dynamics in liquid CO2 near the critical point. It is inspired by a previous work that reports the absence of dysfunctional behavior during the operation of a test compressor in the two-phase region of CO2. First, several characteristic parameters in the literature have suggested that thermal effects have significant impact on the dynamics of a CO2 bubble. These effects lead to the change of vapor pressure inside the bubble, impeding the motion of the bubble interface. As a consequence, the CO2 bubble collapse should feature a slow contraction of the bubble interface and the absence of noticeable pressure rise. In addition, a dynamic model has been proposed to quantitatively study the bubble collapse in liquid CO2 near the critical point. Simulation results have confirmed the qualitative prediction given by characteristic parameters. They have also revealed that the thermal layer inside the bubble has an important contribution to the bubble dynamics, in addition to the one outside the bubble, by altering the rate of phase change at the interface. These predicted results appear to be in line with the aforementioned experimental observations.
Hong-Son Pham, Nicolas Alpy, S. Mensah, Mark Tothill, Jean-Henry Ferrasse, et al.. A numerical study of cavitation and bubble dynamics in liquid CO2 near the critical point. International Journal of Heat and Mass Transfer, 2016, 102, pp.174-185. ⟨10.1016/j.ijheatmasstransfer.2016.06.005⟩. ⟨hal-01461785⟩
Journal: International Journal of Heat and Mass Transfer
Camille Crouzet, Fabrice Brunet, Nadir Recham, N. Findling, M Lanson, et al.. Hydrogen production by hydrothermal oxidation of FeO under acidic conditions
. International Journal of Hydrogen Energy, 2016, 42 (2), pp.795-806. ⟨10.1016/j.ijhydene.2016.10.019⟩. ⟨hal-01468080⟩ Plus de détails...
He production of H2 by oxidation of FeO, taken here as model compound for steel slags, has been investigated both in pure water and under acidic aqueous conditions in the 373–573 K temperature range. Whereas after 65 h, H2 yield was negligible in pure water at 423 K, the reaction 3 FeO(s) + H2O(l) → Fe3O4(s) + H2(aq) reached near completion at the same temperature within 10 h in a solution containing 0.05 mol/l acetic acid. Increasing acetic acid concentration by one order of magnitude did not yield significantly more H2. At identical initial pH, acetic acid was found to be more efficient than oxalic acid and hydrochloric acid at enhancing H2 production. Acidic conditions increased FeO dissolution kinetics and, consequently, improved H2 yield. The specific efficiency of acetic acid resides in its thermal stability as well as in the potential of ligand-promoted Fe(II) dissolution. We show that the positive kinetics effect of mild acetic acid solutions over H2 yield evidenced on FeO does not apply directly to steel slags which buffer the pH to high values due to the presence of large amounts of CaO.
Camille Crouzet, Fabrice Brunet, Nadir Recham, N. Findling, M Lanson, et al.. Hydrogen production by hydrothermal oxidation of FeO under acidic conditions
. International Journal of Hydrogen Energy, 2016, 42 (2), pp.795-806. ⟨10.1016/j.ijhydene.2016.10.019⟩. ⟨hal-01468080⟩
Rainier Hreiz, Nicolas Roche, Brahim Benyahia, M.A. Latifi. Multi-objective optimal control of small-size wastewater treatment plants. Chemical Engineering Research and Design, 2015, 102, pp.345 - 353. ⟨10.1016/j.cherd.2015.06.039⟩. ⟨hal-01665989⟩ Plus de détails...
In this work, a multi-objective dynamic optimization of the operating strategy of a small-size wastewater treatment plant is carried out. In-situ incineration of the excess sludge produced for electricity production is investigated in order to reduce the operating costs. The trade-offs between the treatment quality and the operating costs are characterized. Compared to the literature, emphasis is put on a more rigorous formulation of the problem and an accurate modeling of the underlying phenomena so as to get physically relevant solutions. Thus, from a mathematical perspective, the problem is formulated so that the solution is less sensitive to the - arbitrarily chosen-plant initial conditions. Modeling of physical phenomena e.g. the detrimental effect of the concentration of suspended solids in the mixed liquor, on oxygen transfer rate, has been included in the model. Several constraints are added to the problem so as to maintain the optimal solutions within the limits of validity of the mathematical model. The results provided a clear picture about the trade-offs between the treatment quality and the exploitation costs. Sludge incineration was shown to be of a high energetic profit, but it does not allow the plant to be electrically autonomous.
Rainier Hreiz, Nicolas Roche, Brahim Benyahia, M.A. Latifi. Multi-objective optimal control of small-size wastewater treatment plants. Chemical Engineering Research and Design, 2015, 102, pp.345 - 353. ⟨10.1016/j.cherd.2015.06.039⟩. ⟨hal-01665989⟩
A.-B. Hernandez, J.-H. Ferrasse, S. Akkache, Nicolas Roche. Thermochemical Conversion of Sewage Sludge by TGA-FTIR Analysis: Influence of Mineral Matter Added. Drying Technology, 2015, 33 (11), pp.1318-1326. ⟨10.1080/07373937.2015.1036283⟩. ⟨hal-01297640⟩ Plus de détails...
Thermal treatments, such as combustion, gasification, and pyrolysis, have been proven to be a convenient alternative to conventional sludge disposal technologies. Today, process development implies scaling up and so improving the reactor's design. In continuously operated reactors, fresh sewage sludge is in contact with solid residues (reacted material rich in mineral matter and char). Mineral matter has been reported to catalyze the thermo-chemical reactions involved but few works focus on this aspect. In this work, sewage sludge residues were added to fresh sewage sludge. Non-isothermal thermo-gravimetric analysis (TGA) coupled with infrared spectrometry (FTIR) showed that added residues reduce the characteristic reaction temperatures during char combustion and gasification (air, air-N2, and CO2 atmospheres). However, any considerable influence of residues was observed during pyrolysis experiments (N2 atmosphere). The analysis of gas produced during those experiments revealed further details about the solid decomposition, showing considerable differences between different atmospheres.
A.-B. Hernandez, J.-H. Ferrasse, S. Akkache, Nicolas Roche. Thermochemical Conversion of Sewage Sludge by TGA-FTIR Analysis: Influence of Mineral Matter Added. Drying Technology, 2015, 33 (11), pp.1318-1326. ⟨10.1080/07373937.2015.1036283⟩. ⟨hal-01297640⟩
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-04348574⟩ Plus de détails...
Bubble column reactors are multiphase contactors based on the dispersion of a gas phase in the form of bubbles inside a cylindrical vessel where a liquid or a suspension circulates. Those reactors present many advantages such as good heat and mass transfer rates, no moving parts, compactness, easy operating and low maintenance and operating costs. Their main drawback is the significant backmixing which can affect selectivity and conversion of reaction products. They have gained particular attention in the field of wastewater treatment for Wet Air Oxidation (WAO) processes application. Those processes are operated at high pressures (up to 30 MPa) and temperatures (up to 573 K). In order to efficiently operate those processes, conversion, heat and mass transfer must be optimised. Those parameters depend themselves on operating conditions such as pressure, temperature, superficial gas and liquid velocities and on design parameters such as sparger and column design. This review is aimed to find the relevant parameters for operating bubble column at high pressures and temperatures in continuous mode. The main mechanisms governing the bubble column will be described. The influence of the different parameters on gas holdup, mass transfer properties and on liquid axial dispersion coefficient will be extensively studied.
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-04348574⟩
C. Leonard, J.-H. Ferrasse, Olivier Boutin, S. Lefevre, A. Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-01292678⟩ Plus de détails...
Bubble column reactors are multiphase contactors based on the dispersion of a gas phase in the form of bubbles inside a cylindrical vessel where a liquid or a suspension circulates. Those reactors present many advantages such as good heat and mass transfer rates, no moving parts, compactness, easy operating and low maintenance and operating costs. Their main drawback is the significant backmixing which can affect selectivity and conversion of reaction products. They have gained particular attention in the field of wastewater treatment for Wet Air Oxidation (WAO) processes application. Those processes are operated at high pressures (up to 30 MPa) and temperatures (up to 573 K). In order to efficiently operate those processes, conversion, heat and mass transfer must be optimised. Those parameters depend themselves on operating conditions such as pressure, temperature, superficial gas and liquid velocities and on design parameters such as sparger and column design. This review is aimed to find the relevant parameters for operating bubble column at high pressures and temperatures in continuous mode. The main mechanisms governing the bubble column will be described. The influence of the different parameters on gas holdup, mass transfer properties and on liquid axial dispersion coefficient will be extensively studied.
C. Leonard, J.-H. Ferrasse, Olivier Boutin, S. Lefevre, A. Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-01292678⟩
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, J. Quenaut, et al.. Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor. Atomic Energy Review, 2015, 87, pp.412-424. ⟨10.1016/j.energy.2015.05.022⟩. ⟨hal-01297663⟩ Plus de détails...
The supercritical CO2 (sc-CO2) cycle is being promoted worldwide by many R&D energy organisations and companies as an alternative to the Rankine steam cycle for its capacity to deliver high performance, simple and compact power conversion systems. The past decade has seen an extensive number of published studies carried out in view of analysing the advantages of this cycle for various applications, from nuclear to solar energies. In that context, this work first reports a mapping of the thermodynamic performance of different sc-CO2 cycle configurations that encompass a 250–850°C TIT (turbine inlet temperature) range. The main compressor inlet temperature was chosen to be 35°C to accommodate various heat-sink temperatures while the maximum pressure was parameterised at 20 MPa and at 25 MPa. These charts are seen to provide a preliminary engineering guideline to the maximum performance that one can expect from a sc-CO2 cycle coupled to a specific application. Additionally, they illustrate the effect of the interlinked constraints in terms of optimal recuperation power and IHX (Intermediate Heat eXchanger) inlet temperature. Following this generic study, two typical nuclear applications have been investigated with the support of an exergy analysis. A SMR (small modular reactor) featuring a current generation Pressurized Water Reactor has been chosen as an example of a low temperature range case. Parametric studies of a recompression cycle featuring a TIT of 275°C have guided investigations regarding optimal operating conditions depending on a balance between cycle efficiency, recuperation power, and main compressor operation margin with respect to the critical point. Options for performance improvement such as reheat and condensing mode operation have been investigated for a maximum cycle pressure of 20 MPa. Thermal efficiencies of 29.3% and 28.6% respectively are reported for these two cases. This is in contrast to 27.1% for the initial recompression cycle design. Even though the penalty when compared to a Rankine steam cycle is significant, the sc-CO2 cycle in condensing mode is viewed as an interesting option thanks to its system simplicity and footprint saving. Moving to a higher temperature range, the sc-CO2 cycle has been studied at a TIT of 515°C for a test case application to a SFR (sodium-cooled fast reactor). The recompression cycle operating at a compressor inlet temperature of 35°C provides a maximum efficiency of 43.9% and features an optimal IHX inlet temperature of 347.8°C. However the considered application requires that this temperature should be kept below 330°C. Work has been carried out to optimise the cycle with regard to this specific constraint through several options including the modification of the operating conditions and the investigation of other cycle configurations. The recompression cycle in condensing mode is finally identified as the most interesting one since it achieves an efficiency of 45.7% and features an optimal IHX inlet temperature of 328.6°C.
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, J. Quenaut, et al.. Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor. Atomic Energy Review, 2015, 87, pp.412-424. ⟨10.1016/j.energy.2015.05.022⟩. ⟨hal-01297663⟩
Cristian Barca, Audrey Soric, David Ranava, Marie-Thérèse Giudici-Orticoni, Jean-Henry Ferrasse. Anaerobic biofilm reactors for dark fermentative hydrogen production from wastewater: A review. Bioresource Technology, 2015, 185, pp.386 - 398. ⟨10.1016/j.biortech.2015.02.063⟩. ⟨hal-01446104⟩ Plus de détails...
Dark fermentation is a bioprocess driven by anaerobic bacteria that can produce hydrogen (H2) from organic waste and wastewater. This review analyses a relevant number of recent studies that have investigated dark fermentative H2 production from wastewater using two different types of anaerobic biofilm reactors: anaerobic packed bed reactor (APBR) and anaerobic fluidized bed reactor (AFBR). The effect of various parameters, including temperature, pH, carrier material, inoculum pretreatment, hydraulic retention time, substrate type and concentration, on reactor performances was investigated by a critical discussion of the results published in the literature. Also, this review presents an in-depth study on the influence of the main operating parameters on the metabolic pathways. The aim of this review is to provide to researchers and practitioners in the field of H2 production key elements for the best operation of the reactors. Finally, some perspectives and technical challenges to improve H2 production were proposed.
Cristian Barca, Audrey Soric, David Ranava, Marie-Thérèse Giudici-Orticoni, Jean-Henry Ferrasse. Anaerobic biofilm reactors for dark fermentative hydrogen production from wastewater: A review. Bioresource Technology, 2015, 185, pp.386 - 398. ⟨10.1016/j.biortech.2015.02.063⟩. ⟨hal-01446104⟩
Gustavo Henndel . Lopes, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Predicting Permeate Fluxes and Rejection Rates in Reverse Osmosis and Tight-Nanofiltration Processes. Chemical Engineering and Technology, 2015, 38 (4), pp.585-594. ⟨10.1002/ceat.201400654⟩. ⟨hal-01135689⟩ Plus de détails...
The performance of reverse osmosis and tight nanofiltration with flat-sheet membranes can be predicted accurately. The proposed numerical model solves the local momentum and mass conservation equations in the module's feed channel with solution-diffusion boundary conditions. Both qualitative and quantitative predictions of the permeate flux and of the rejection rate are obtained with an accuracy depending on the limitations of the solution-diffusion model for describing membrane mass transport and on the value of solute permeability. As an extension of the applications to plate-and-frame modules, the ability to describe the performance of processes carried out with spiral-wound modules is also tested with own desalination experiments and with data from the literature.
Gustavo Henndel . Lopes, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Predicting Permeate Fluxes and Rejection Rates in Reverse Osmosis and Tight-Nanofiltration Processes. Chemical Engineering and Technology, 2015, 38 (4), pp.585-594. ⟨10.1002/ceat.201400654⟩. ⟨hal-01135689⟩
Céline Bonnyaud, Didier Pradon, Raphael Zory, Djamel Bensmail, Nicolas Vuillerme, et al.. Gait parameters predicted by Timed Up and Go performance in stroke patients. NeuroRehabilitation, 2015, 36 (1), pp.73-80. ⟨10.3233/NRE-141194⟩. ⟨hal-02528987⟩ Plus de détails...
Céline Bonnyaud, Didier Pradon, Raphael Zory, Djamel Bensmail, Nicolas Vuillerme, et al.. Gait parameters predicted by Timed Up and Go performance in stroke patients. NeuroRehabilitation, 2015, 36 (1), pp.73-80. ⟨10.3233/NRE-141194⟩. ⟨hal-02528987⟩
Félicité Ondze, Olivier Boutin, Jean-Christophe Ruiz, Jean-Henry Ferrasse, Frédéric Charton. Supercritical water gasification of beet residues: From batch to continuous reactor. Chemical Engineering Science, 2015, 123, pp.350-358. ⟨10.1016/j.ces.2014.11.026⟩. ⟨hal-01297667⟩ Plus de détails...
A residue obtained after the distillation of agricultural alcohol called beet residues is gasified in supercritical water to form a mixture of fuel gas. A parametric study and thermodynamic calculations are first proposed in batch reactor. The results show a significant effect of temperature on the overall mass yields. Gasification efficiencies range from 0.60 to 0.90 g g−1 when temperature increases from 450 to 600 °C. The gas low heating value increases under these conditions from 7.4 to 13.2 MJ kg−1 of initial dry feedstock. After that, a continuous system designed for hydrothermal oxidation processes has been used. For supercritical water gasification, the reduction of total organic carbon in the liquid effluent output presents a little variation, between 59 and 69%, when the operating conditions are changed. To increase the reaction temperature, supercritical water partial oxidation has been conducted. The highest carbon gasification yield is obtained for the highest equivalent molar ratio, indicating a great interest of partial oxidation. Moreover, the results indicate that this process configuration accepts biomass flow variations without influencing the global efficiency.
Félicité Ondze, Olivier Boutin, Jean-Christophe Ruiz, Jean-Henry Ferrasse, Frédéric Charton. Supercritical water gasification of beet residues: From batch to continuous reactor. Chemical Engineering Science, 2015, 123, pp.350-358. ⟨10.1016/j.ces.2014.11.026⟩. ⟨hal-01297667⟩
Céline Bonnyaud, Raphael Zory, Johanna Robertson, Djamel Bensmail, Nicolas Vuillerme, et al.. Effect of an Overground Training Session Versus a Treadmill Training Session on Timed Up and Go in Hemiparetic Patients. Topics in Stroke Rehabilitation, 2015, 21 (6), pp.477-483. ⟨10.1310/tsr2106-477⟩. ⟨hal-02528990⟩ Plus de détails...
Céline Bonnyaud, Raphael Zory, Johanna Robertson, Djamel Bensmail, Nicolas Vuillerme, et al.. Effect of an Overground Training Session Versus a Treadmill Training Session on Timed Up and Go in Hemiparetic Patients. Topics in Stroke Rehabilitation, 2015, 21 (6), pp.477-483. ⟨10.1310/tsr2106-477⟩. ⟨hal-02528990⟩
Céline Bonnyaud, Didier Pradon, Raphael Zory, Djamel Bensmail, Nicolas Vuillerme, et al.. Does a Single Gait Training Session Performed Either Overground or on a Treadmill Induce Specific Short-Term Effects on Gait Parameters in Patients with Hemiparesis? A Randomized Controlled Study. Topics in Stroke Rehabilitation, 2015, 20 (6), pp.509-518. ⟨10.1310/tsr2006-509⟩. ⟨hal-02529024⟩ Plus de détails...
Céline Bonnyaud, Didier Pradon, Raphael Zory, Djamel Bensmail, Nicolas Vuillerme, et al.. Does a Single Gait Training Session Performed Either Overground or on a Treadmill Induce Specific Short-Term Effects on Gait Parameters in Patients with Hemiparesis? A Randomized Controlled Study. Topics in Stroke Rehabilitation, 2015, 20 (6), pp.509-518. ⟨10.1310/tsr2006-509⟩. ⟨hal-02529024⟩
Martine Poux, Nicolas Roche. 10th European Congress of Chemical Engineering (ECCE10)/3rd European Congress of Applied Biotechnology (ECAB3)/5th European Process Intensification Conference (EPIC5) – Nice, France, September 27-October 1, 2015. Green Processing and Synthesis, 2015, 4 (2), pp.151-152. ⟨10.1515/gps-2015-0012⟩. ⟨hal-01898222⟩ Plus de détails...
1n September 2015, the city of Nice, France, will host the 10th European Congress of Chemical Engineering (ECCE10) in conjunction with the 3rd European Congress of Applied Biotechnology (ECAB3) and the 5th European Process Intensification Conference (EPIC5). This will be the most important scientific event in chemical and biochemical engineering in Europe in 2015. The global theme for this group of events is “Chemical and biochemical engineering for a new sustainable process industry in Europe”.
Martine Poux, Nicolas Roche. 10th European Congress of Chemical Engineering (ECCE10)/3rd European Congress of Applied Biotechnology (ECAB3)/5th European Process Intensification Conference (EPIC5) – Nice, France, September 27-October 1, 2015. Green Processing and Synthesis, 2015, 4 (2), pp.151-152. ⟨10.1515/gps-2015-0012⟩. ⟨hal-01898222⟩
Isabelle Seyssiecq, Mohsen Karrabi, Nicolas Roche. In situ rheological characterisation of wastewater sludge: Comparison of stirred bioreactor and pipe flow configurations. Chemical Engineering Journal, 2015, 259, pp.205 - 212. ⟨10.1016/j.cej.2014.07.102⟩. ⟨hal-01666306⟩ Plus de détails...
Isabelle Seyssiecq, Mohsen Karrabi, Nicolas Roche. In situ rheological characterisation of wastewater sludge: comparison of stirred bioreactor and pipe flow configurations. The Chemical Engineering Journal, 2015, 259, pp.205-212. ⟨10.1016/j.cej.2014.07.102⟩. ⟨hal-01467179⟩ Plus de détails...
In the present work, non-Newtonian properties of activated sludge are investigated using a bench test device specially developed for the purpose of this work. This set-up consists in a bioreactor equipped with a helical ribbon impeller (HRI configuration), and a recirculation loop of the sludge (pipe flow (PF) configuration). The HRI configuration is equipped with a motor and a torque-meter allowing in situ determination of sludge rheogram under stirred reactor conditions. On the PF configuration, differential pressure and flow transducers are implemented, allowing in situ determination of sludge rheogram under piping conditions. Both configurations are then compared. The yield stress, flow and consistency indexes of sludge suspensions (Herschel–Bulkley rheological law coefficients, $\tau_y$, $K$ and $n$) are determined over a large range of total suspended solid (TSS) concentrations, (12–38 g L$^{−1}$) in the laminar flow regime. The analysis of experimental data shows that measurements performed with the PF configuration have to be corrected in order to take into account a wall slip phenomenon. A correction model is proposed that shows that slip mechanism is mostly due to wall static depletion at low solid concentrations (12–17 g L$^{−1}$), then turns to shear induced migration effect at higher solid concentrations (26–38 g L$^{−1}$).
Isabelle Seyssiecq, Mohsen Karrabi, Nicolas Roche. In situ rheological characterisation of wastewater sludge: comparison of stirred bioreactor and pipe flow configurations. The Chemical Engineering Journal, 2015, 259, pp.205-212. ⟨10.1016/j.cej.2014.07.102⟩. ⟨hal-01467179⟩
D. Meyer, Florent Chazarenc, D. Claveau Mallet, D. Dittmer, N. Forquet, et al.. Modelling constructed wetlands: scopes and aims - a comparative review. Ecological Engineering, 2015, 80, pp.205-213. ⟨10.1016/j.ecoleng.2014.10.031⟩. ⟨hal-01196617⟩ Plus de détails...
During the last two decades a couple of models were developed for constructed wetlands with differing purposes. Meanwhile the usage of this kind of tool is generally accepted, but the misuse of the models still confirms the skepticism. Generally three some groups of models can be distinguished: On one hand mechanistic models try to display the complex and diffuse interaction of occurring processes, on the other hand the same kind of models is are used to investigate single processes. New kinds of simplified approaches - well appreciated by engineers - try to display system performances without going to deep into details. All types of models are valuable - some more for scientific usage, others more for engineering. The given summary tries to support potential users in talking the right choice in model selection. Big differences can be found in the model availabilities. Whereas some of the compared software packages are purchasable without limitation, some others are only accessible on their platform level, and some can be seen as secret exclusive property. From the experience of the authors it can be summarized, that research groups starting modelling / simulation studies should be encouraged to use the given knowledge before starting from scratch again.
D. Meyer, Florent Chazarenc, D. Claveau Mallet, D. Dittmer, N. Forquet, et al.. Modelling constructed wetlands: scopes and aims - a comparative review. Ecological Engineering, 2015, 80, pp.205-213. ⟨10.1016/j.ecoleng.2014.10.031⟩. ⟨hal-01196617⟩
Nicolas Roche, Bruno Molle. Recyclage et réutilisation des eaux industrielles et agricoles. R. MOSSERI, C. JEANDEL, A. EUZEN. Ouvrage l’eau à découvert, coordinateurs R, CNRS, 2015. ⟨hal-01313522⟩ Plus de détails...
Nicolas Roche, Bruno Molle. Recyclage et réutilisation des eaux industrielles et agricoles. R. MOSSERI, C. JEANDEL, A. EUZEN. Ouvrage l’eau à découvert, coordinateurs R, CNRS, 2015. ⟨hal-01313522⟩
Ming Zeng, Audrey Soric, Nicolas Roche. Modeling partial nitrification and denitrification in a hybrid biofilm reactor: calibration by retention time distribution and respirometric tests. Environmental Science and Pollution Research, Springer Verlag, 2015. ⟨hal-01467183⟩ Plus de détails...
In this study, partial nitrification coupled with denitrification is modeled in a hybrid biofilm reactor with different hydraulic saturation conditions. The activated sludge model with two-step nitrification is implemented in GPS-X software. Hydrodynamic modeling by retention time distribution analysis and biokinetic measurement by respirometric tests are two significant parts of model calibration. By combining these two parts, partial nitrification in the aerobic part of the column is well simulated with a good agreement between experimental and modeled effluent concentrations of NH4 (+) and NO2 (-). Particularly, fully hydraulic saturation condition contributes to the large hydraulic volume of 1.9 L and high produced NO2 (-) concentration around 40 mg L-1. However, modeling denitrification still needs to be improved with more calibrated parameters. Furthermore, three alternatives are proposed for the optimization of reactor design and operation.
Ming Zeng, Audrey Soric, Nicolas Roche. Modeling partial nitrification and denitrification in a hybrid biofilm reactor: calibration by retention time distribution and respirometric tests. Environmental Science and Pollution Research, Springer Verlag, 2015. ⟨hal-01467183⟩
Journal: Environmental Science and Pollution Research
Isabelle Seyssiecq, Mohsen Karrabi, Nicolas Roche. In situ rheological characterisation of wastewater sludge: Comparison of stirred bioreactor and pipe flow configurations. Journal Chemical Engineering, 2015, 259 (205-212), ⟨10.1016/j.cej.2014.07.102⟩. ⟨hal-01467179⟩ Plus de détails...
In the present work, non-Newtonian properties of activated sludge are investigated using a bench test device specially developed for the purpose of this work. This set-up consists in a bioreactor equipped with a helical ribbon impeller (HRI configuration), and a recirculation loop of the sludge (pipe flow (PF) configuration). The HRI configuration is equipped with a motor and a torque-meter allowing in situ determination of sludge rheogram under stirred reactor conditions. On the PF configuration, differential pressure and flow transducers are implemented, allowing in situ determination of sludge rheogram under piping conditions. Both configurations are then compared. The yield stress, flow and consistency indexes of sludge suspensions (Herschel–Bulkley rheological law coefficients, τy, K and n) are determined over a large range of total suspended solid (TSS) concentrations, (12–38 g L−1) in the laminar flow regime. The analysis of experimental data shows that measurements performed with the PF configuration have to be corrected in order to take into account a wall slip phenomenon. A correction model is proposed that shows that slip mechanism is mostly due to wall static depletion at low solid concentrations (12–17 g L−1), then turns to shear induced migration effect at higher solid concentrations (26–38 g L−1).
Isabelle Seyssiecq, Mohsen Karrabi, Nicolas Roche. In situ rheological characterisation of wastewater sludge: Comparison of stirred bioreactor and pipe flow configurations. Journal Chemical Engineering, 2015, 259 (205-212), ⟨10.1016/j.cej.2014.07.102⟩. ⟨hal-01467179⟩
Andre Chanzy, Eric Sauquet, O. Banton, Nicolas Roche. Ressources hydriques en milieu méditerranéen. Provence-Alpes-Côte d’Azur, une région face au changement climatique, GREC-PACA, GREC-PACA, 40 p., 2015. ⟨hal-01603517⟩ Plus de détails...
Andre Chanzy, Eric Sauquet, O. Banton, Nicolas Roche. Ressources hydriques en milieu méditerranéen. Provence-Alpes-Côte d’Azur, une région face au changement climatique, GREC-PACA, GREC-PACA, 40 p., 2015. ⟨hal-01603517⟩
Rainier Hreiz, M A Latifi, Nicolas Roche. Optimal design and operation of activated sludge processes: State-of-the-art. Chemical Engineering Journal, 2015, 281, pp.900 - 920. ⟨10.1016/j.cej.2015.06.125⟩. ⟨hal-01458423⟩ Plus de détails...
The activated sludge process (ASP) is the most commonly used process for wastewater treatment. Improving its performance is necessary from economic and environmental point of views. In this context, dynamic optimization is a powerful tool for assisting engineers in determining optimal operations and designs for ASPs. However, the real optimality of the solution strongly depends on the optimization problem statement, for which unfortunately, there is no standard or commonly accepted formulation. In a hopeful attempt to provide a guideline for future works on the topic, this paper reviews the literature devoted to optimal control and design of ASPs. The main issues to be addressed in order to get reliable solutions are discussed , among which: (1) Managing the inevitable mismatch between the model predictions and the real ASP operation. (2) Dealing with the unpredictable variations in the wastewater characteristics. (3) Accounting for the slowest dynamic processes occurring in ASPs. (4) Appropriately selecting the decision variables and the flowsheet structure in order to simplify the problem formulation from a mathematical perspective. (5) Conveniently choosing the cost functions expressions/correlations. (6) Successfully selecting the mathematical constraints in order to guarantee physically relevant operations.
Rainier Hreiz, M A Latifi, Nicolas Roche. Optimal design and operation of activated sludge processes: State-of-the-art. Chemical Engineering Journal, 2015, 281, pp.900 - 920. ⟨10.1016/j.cej.2015.06.125⟩. ⟨hal-01458423⟩
Jean Slawinski, Didier Pradon, Djamel Bensmail, Nicolas Roche, Raphaël Zory. Energy Cost of Obstacle Crossing in Stroke Patients. American Journal of Physical Medicine and Rehabilitation, 2014, 93 (12), pp.1044--1050. ⟨10.1097/PHM.0000000000000122⟩. ⟨hal-01467715⟩ Plus de détails...
OBJECTIVE: The purpose of this study was to analyze the effects of clearing and skirting obstacles during the gait on the energetic cost of walking (ECW) of patients with chronic hemiplegia. The hypothesis was that hemiplegia would have a greatest increase in the ECW than in the healthy group. DESIGN: Fifteen healthy subjects and 17 patients with chronic hemiplegia completed two 6-min walking sessions: one with obstacles and the other without obstacles. During both sessions, the patients were equipped with a portable gas analyzer to measure oxygen uptake (V˙o2). Gait velocity and ECW were calculated. RESULTS: In both groups, gait velocity was lower in the with-obstacles condition and the ECW was significantly higher. V˙o2 was greater in the with-obstacles condition for the healthy group, whereas it remained unchanged for the group with hemiplegia. CONCLUSIONS: Results demonstrated that the addition of obstacles during gait increased the ECW and decreased mean walking speed in both the healthy subjects and the patients with hemiplegia. More interestingly, the authors found differences in adaptation strategies between the healthy subjects and the patients with hemiplegia. During the with-obstacles condition, the oxygen uptakes of the healthy subjects increased and mean walking speed decreased, whereas, in the subjects with hemiplegia, only mean walking speed decreased. CONCLUSIONS: Results demonstrated that the addition of obstacles during gait increased the ECW and decreased mean walking speed in both the healthy subjects and the patients with hemiplegia. More interestingly, the authors found differences in adaptation strategies between the healthy subjects and the patients with hemiplegia. During the with-obstacles condition, the oxygen uptakes of the healthy subjects increased and mean walking speed decreased, whereas, in the subjects with hemiplegia, only mean walking speed decreased.
Jean Slawinski, Didier Pradon, Djamel Bensmail, Nicolas Roche, Raphaël Zory. Energy Cost of Obstacle Crossing in Stroke Patients. American Journal of Physical Medicine and Rehabilitation, 2014, 93 (12), pp.1044--1050. ⟨10.1097/PHM.0000000000000122⟩. ⟨hal-01467715⟩
Journal: American Journal of Physical Medicine and Rehabilitation
Gustavo Henndel Lopes, Pierrette Guichardon, Nelson Ibaseta, Pierre Haldenwang. L’eau, ressource rare ? Gros plan sur le procédé de dessalement par membranes d’osmose inverse. L'Actualité Chimique, 2014, N° thématique: La chimie et la ville de demain Colloque Recherche de la Fédération Gay-Lussac, Paris, 4-6 décembre 2013, 390, pp.85-87. ⟨hal-01116186⟩ Plus de détails...
Le procédé d’osmose inverse s’impose aujourd'hui dans la production d’eau douce par dessalement. Des avancées en matière de prédiction des performances de ce procédé s’avèrent précieuses dans l’optimisation rapide et peu coûteuse des conditions de fonctionnement. L’interaction entre les propriétés de la membrane et les phénomènes prépondérants (polarisation de concentration, pression osmotique...) constitue un problème scientifiquement complexe, traité dans cette étude via une approche modélisation numérique-simulation-expérimentation, une question centrale pour le génie des procédés.
Gustavo Henndel Lopes, Pierrette Guichardon, Nelson Ibaseta, Pierre Haldenwang. L’eau, ressource rare ? Gros plan sur le procédé de dessalement par membranes d’osmose inverse. L'Actualité Chimique, 2014, N° thématique: La chimie et la ville de demain Colloque Recherche de la Fédération Gay-Lussac, Paris, 4-6 décembre 2013, 390, pp.85-87. ⟨hal-01116186⟩
Gustavo Henndel Lopes, Pierrette Guichardon, Nelson Ibaseta, Pierre Haldenwang. L’eau, ressource rare ? Gros plan sur le procédé de dessalement par membranes d’osmose inverse
. L'Actualité Chimique, 2014, N° thématique: La chimie et la ville de demain Colloque Recherche de la Fédération Gay-Lussac, Paris, 4-6 décembre 2013, 390, pp.85-87. ⟨hal-01116186⟩ Plus de détails...
Le procédé d’osmose inverse s’impose aujourd'hui dans la production d’eau douce par dessalement. Des avancées en matière de prédiction des performances de ce procédé s’avèrent précieuses dans l’optimisation rapide et peu coûteuse des conditions de fonctionnement. L’interaction entre les propriétés de la membrane et les phénomènes prépondérants (polarisation de concentration, pression osmotique...) constitue un problème scientifiquement complexe, traité dans cette étude via une approche modélisation numérique-simulation-expérimentation, une question centrale pour le génie des procédés.
Gustavo Henndel Lopes, Pierrette Guichardon, Nelson Ibaseta, Pierre Haldenwang. L’eau, ressource rare ? Gros plan sur le procédé de dessalement par membranes d’osmose inverse
. L'Actualité Chimique, 2014, N° thématique: La chimie et la ville de demain Colloque Recherche de la Fédération Gay-Lussac, Paris, 4-6 décembre 2013, 390, pp.85-87. ⟨hal-01116186⟩
Ming Zeng, Audrey Soric, Nicolas Roche. Modeling partial nitrification and denitrification in a hybrid biofilm reactor: calibration by retention time distribution and respirometric tests. Environmental Science and Pollution Research, 2014, 22 (17), pp.nicolas.roche. ⟨10.1007/s11356-014-3667-0⟩. ⟨hal-01086582⟩ Plus de détails...
In this study, partial nitrification coupled with denitrification is modeled in a hybrid biofilm reactor with different hydraulic saturation conditions. The activated sludge model with two-steps nitrification is implemented in GPS-X software. Hydrodynamic modeling by retention time distribution (RTD) analysis and biokinetic measurement by respirometric tests are two significant parts of model calibration. By combining these two parts, partial nitrification in the aerobic part of the column is well simulated with a good agreement between experimental and modeled effluent concentrations of NH4+ and NO2-. Particularly, fully hydraulic saturation condition contributes to the large hydraulic volume of 1.9 L and high produced NO2- concentration around 40 mg.L-1. However, modeling denitrification still needs to be improved with more calibrated parameters. Furthermore, three alternatives are proposed for the optimization of reactor design and operation
Ming Zeng, Audrey Soric, Nicolas Roche. Modeling partial nitrification and denitrification in a hybrid biofilm reactor: calibration by retention time distribution and respirometric tests. Environmental Science and Pollution Research, 2014, 22 (17), pp.nicolas.roche. ⟨10.1007/s11356-014-3667-0⟩. ⟨hal-01086582⟩
Journal: Environmental Science and Pollution Research
Doassans-Carrère Nicolas, Jean-Henry Ferrasse, Olivier Boutin, Guillain Mauviel, Jacques Lédé. Comparative study of biomass fast pyrolysis and direct liquefaction for bio-oils production: Products yield and
characterizations. Energy & Fuels, 2014, 28, pp.5103-5111. ⟨10.1021/ef500641c⟩. ⟨hal-01232013⟩ Plus de détails...
The objective of this work is to compare two biomass-to-oil processes: fast pyrolysis and direct liquefaction, using the same biomass (beech sawdust). Fast pyrolysis is conducted in a cyclone reactor (wall temperature between 870 and 1040 K) and direct liquefaction in a 150-mL-autoclave reactor (bulk temperature between 420 and 600 K). Three fractions of pyro-oil are obtained from fast pyrolysis (heavy oil, light oil, and aerosol), whereas two fractions of liq-oil (heavy oil and water-soluble organics) are obtained from direct liquefaction. The comparison of both processes is based on the product yields and their characterization (ultimate analysis for solid and oils, oil−water content, gas and oil molecular composition, 1 H NMR for oils). For both processes, there is an optimal temperature at which the oil yield is maximum. Up to 62.6 wt % of pyro-oil are obtained at 970 K with the cyclone reactor (with 25.7 wt % of gas and 11.7 wt % of solid), whereas 47.0 wt % of liq-oil was obtained at 573 K with the batch-reactor (completed by 5.5 wt % of gas and 17.8 wt % of solid). Water content mainly explains the differences (mass yield and oxygen content) between oils from fast pyrolysis and direct liquefaction. Nevertheless, there are also some differences in organic composition: levoglucosane is a main component in pyro-oil, whereas levulinic acid is a main component in liq-oil. Finally, gas formed during direct liquefaction is mainly composed of CO2 (more than 99 wt %), whereas gas from fast pyrolysis is a mixture of CO, CO2, H2, CH4, and light hydrocarbons.
Doassans-Carrère Nicolas, Jean-Henry Ferrasse, Olivier Boutin, Guillain Mauviel, Jacques Lédé. Comparative study of biomass fast pyrolysis and direct liquefaction for bio-oils production: Products yield and
characterizations. Energy & Fuels, 2014, 28, pp.5103-5111. ⟨10.1021/ef500641c⟩. ⟨hal-01232013⟩
Lauren E. Barton, Melanie Auffan, Marie Bertrand-Huleux, mohamed Barakat, Catherine Santaella, et al.. The Transformation of Pristine and Citrate-Functionalized CeO2 Nanoparticles in a Laboratory Scale Aerobic Activated Sludge Reactor. Environmental Science and Technology, 2014, 48 (13), pp.7289 - 7296. ⟨10.1021/es404946y⟩. ⟨hal-01086566⟩ Plus de détails...
Engineered nanomaterials (ENMs) are used to enhance the properties of many manufactured products and technologies. Increased use of ENMs will inevitably lead to their release into the environment. An important route of exposure is through the waste stream, where ENMs will enter wastewater treatment plants (WWTPs), undergo transformations, and be discharged with treated effluent or biosolids. To better understand the fate of a common ENM in WWTPs, experiments with laboratory-scale activated sludge reactors and pristine and citrate-functionalized CeO2 nanoparticles (NPs) were conducted. Greater than 90% of the CeO2 introduced was observed to associate with biosolids. This association was accompanied by reduction of the Ce(IV) NPs to Ce(III). After 5 weeks in the reactor, 44 ± 4% reduction was observed for the pristine NPs and 31 ± 3% for the citrate-functionalized NPs, illustrating surface functionality dependence. Thermodynamic arguments suggest that the likely Ce(III) phase generated would be Ce2S3. This study indicates that the majority of CeO2 NPs (>90% by mass) entering WWTPs will be associated with the solid phase, and a significant portion will be present as Ce(III). At maximum, 10% of the CeO2 will remain in the effluent and be discharged as a Ce(IV) phase, governed by cerianite (CeO2).
Lauren E. Barton, Melanie Auffan, Marie Bertrand-Huleux, mohamed Barakat, Catherine Santaella, et al.. The Transformation of Pristine and Citrate-Functionalized CeO2 Nanoparticles in a Laboratory Scale Aerobic Activated Sludge Reactor. Environmental Science and Technology, 2014, 48 (13), pp.7289 - 7296. ⟨10.1021/es404946y⟩. ⟨hal-01086566⟩
Julien Boudarham, Nicolas Roche, Didier Pradon, Eric Delouf, Djamel Bensmail, et al.. Effects of Quadriceps Muscle Fatigue on Stiff-Knee Gait in Patients with Hemiparesis. PLoS ONE, 2014, 9 (4), pp.e94138. ⟨10.1371/journal.pone.0094138⟩. ⟨hal-02529007⟩ Plus de détails...
The relationship between neuromuscular fatigue and locomotion has never been investigated in hemiparetic patients despite the fact that, in the clinical context, patients report to be more spastic or stiffer after walking a long distance or after a rehabilitation session. The aim of this study was to evaluate the effects of quadriceps muscle fatigue on the biomechanical gait parameters of patients with a stiff-knee gait (SKG). Thirteen patients and eleven healthy controls performed one gait analysis before a protocol of isokinetic quadriceps fatigue and two after (immediately after and after 10 minutes of rest). Spatiotemporal parameters, sagittal knee and hip kinematics, rectus femoris (RF) and vastus lateralis (VL) kinematics and electromyographic (EMG) activity were analyzed. The results showed that quadriceps muscle weakness, produced by repetitive concentric contractions of the knee extensors, induced an improvement of spatiotemporal parameters for patients and healthy subjects. For the patient group, the increase in gait velocity and step length was associated with i) an increase of sagittal hip and knee flexion during the swing phase, ii) an increase of the maximal normalized length of the RF and VL and of the maximal VL lengthening velocity during the pre-swing and swing phases, and iii) a decrease in EMG activity of the RF muscle during the initial pre-swing phase and during the latter 2/3 of the initial swing phase. These results suggest that quadriceps fatigue did not alter the gait of patients with hemiparesis walking with a SKG and that neuromuscular fatigue may play the same functional role as an anti-spastic treatment such as botulinum toxin-A injection. Strength training of knee extensors, although commonly performed in rehabilitation, does not seem to be a priority to improve gait of these patients.
Julien Boudarham, Nicolas Roche, Didier Pradon, Eric Delouf, Djamel Bensmail, et al.. Effects of Quadriceps Muscle Fatigue on Stiff-Knee Gait in Patients with Hemiparesis. PLoS ONE, 2014, 9 (4), pp.e94138. ⟨10.1371/journal.pone.0094138⟩. ⟨hal-02529007⟩
Julien Boudarham, Nicolas Roche, Mickael Teixeira, Sophie Hameau, Johanna Robertson, et al.. Relationship between neuromuscular fatigue and spasticity in chronic stroke patients: A pilot study. Journal of Electromyography and Kinesiology, 2014, 24 (2), pp.292-299. ⟨10.1016/j.jelekin.2013.11.006⟩. ⟨hal-02529022⟩ Plus de détails...
Julien Boudarham, Nicolas Roche, Mickael Teixeira, Sophie Hameau, Johanna Robertson, et al.. Relationship between neuromuscular fatigue and spasticity in chronic stroke patients: A pilot study. Journal of Electromyography and Kinesiology, 2014, 24 (2), pp.292-299. ⟨10.1016/j.jelekin.2013.11.006⟩. ⟨hal-02529022⟩
Journal: Journal of Electromyography and Kinesiology
Claire Marchiori, Nicolas Roche, Nicolas Vuillerme, Raphael Zory, Didier Pradon. Effect of multisite botulinum toxin injections on gait quality in adults with cerebral palsy. Disability and Rehabilitation, 2014, 36 (23), pp.1971-1974. ⟨10.3109/09638288.2014.883443⟩. ⟨hal-02529012⟩ Plus de détails...
In the management of adults with cerebral palsy (CP), one of the goals is to monitor and prevent spasticity-related deteriorations in gait. Botulinum Toxin Injections (BTI) are commonly used to treat this spasticity in these patients. The purpose of this study was to evaluate (i) the effect of multi-site BTI on gait patterns in adults with CP and (ii) to determine if these modifications could be detected by the Gait Deviation Index (GDI).
Claire Marchiori, Nicolas Roche, Nicolas Vuillerme, Raphael Zory, Didier Pradon. Effect of multisite botulinum toxin injections on gait quality in adults with cerebral palsy. Disability and Rehabilitation, 2014, 36 (23), pp.1971-1974. ⟨10.3109/09638288.2014.883443⟩. ⟨hal-02529012⟩
Céline Bonnyaud, Raphael Zory, Julien Boudarham, Didier Pradon, Djamel Bensmail, et al.. Effect of a robotic restraint gait training versus robotic conventional gait training on gait parameters in stroke patients. Experimental Brain Research, 2014, 232 (1), pp.31-42. ⟨10.1007/s00221-013-3717-8⟩. ⟨hal-02529025⟩ Plus de détails...
Céline Bonnyaud, Raphael Zory, Julien Boudarham, Didier Pradon, Djamel Bensmail, et al.. Effect of a robotic restraint gait training versus robotic conventional gait training on gait parameters in stroke patients. Experimental Brain Research, 2014, 232 (1), pp.31-42. ⟨10.1007/s00221-013-3717-8⟩. ⟨hal-02529025⟩
Souha Gamri, Audrey Soric, Séverine Tomas, Bruno Molle, Nicolas Roche. Biofilm development in micro-irrigation emitters for wastewater reuse. Irrigation Science, 2014, 32 (1), pp.77-85. ⟨10.1007/s00271-013-0414-0⟩. ⟨hal-00992245⟩ Plus de détails...
Laboratory experiments were carried out to investigate bioclogging on three types of online emitters using synthetic wastewater filtered at 10 μm (COD = 200 mg/L). The three types of emitters were as follows: non-pressure-compensating emitters delivering 2 L/h (NPC2), non-pressure-compensating emitters delivering 4 L/h (NPC4) and pressure-compensating emitters delivering 2.2 L/h (PC). They were plugged on two parallel pipe diameters (16 and 20 mm). Emitter performance was followed by flow rate measurements. The results showed that PC emitters seemed to be more sensitive to clogging than NPC emitters. Biofilm was observed mainly on NPC flow paths and PC membranes; its presence was also confirmed by the assessment of different water quality parameters such as total organic carbon and pH. Experimental results compared with a model designed with computational fluid dynamics Software (ANSYS Fluent®) showed relations between biofilm development and velocity distribution on NPC flow paths. Finally, pipe diameter also appeared to be a parameter inducing emitter clogging.
Souha Gamri, Audrey Soric, Séverine Tomas, Bruno Molle, Nicolas Roche. Biofilm development in micro-irrigation emitters for wastewater reuse. Irrigation Science, 2014, 32 (1), pp.77-85. ⟨10.1007/s00271-013-0414-0⟩. ⟨hal-00992245⟩
Nicolas Roche, Didier Pradon, Julie Cosson, Johanna Robertson, Claire Marchiori, et al.. Categorization of gait patterns in adults with cerebral palsy: A clustering approach. Gait & Posture, 2014, 39 (1), pp.235-240. ⟨10.1016/j.gaitpost.2013.07.110⟩. ⟨hal-02529032⟩ Plus de détails...
Nicolas Roche, Didier Pradon, Julie Cosson, Johanna Robertson, Claire Marchiori, et al.. Categorization of gait patterns in adults with cerebral palsy: A clustering approach. Gait & Posture, 2014, 39 (1), pp.235-240. ⟨10.1016/j.gaitpost.2013.07.110⟩. ⟨hal-02529032⟩
A. Hernandez, J.-H. Ferrasse, Nicolas Roche. Limiting the Pollutant Content in the Sewage Sludge Producer Gas through Staged Gasification. Chemical Engineering and Technology, 2013, 36 (11), pp.1985 - 1996. ⟨10.1002/ceat.201300103⟩. ⟨hal-01666322⟩ Plus de détails...
A. Hernandez, J.-H. Ferrasse, Nicolas Roche. Limiting the Pollutant Content in the Sewage Sludge Producer Gas through Staged Gasification. Chemical Engineering and Technology, 2013, 36 (11), pp.1985 - 1996. ⟨10.1002/ceat.201300103⟩. ⟨hal-01666322⟩
S. Akkache, I. Seyssiecq, Nicolas Roche. Effect of exo-polysaccharide concentration in the rheological properties and settling ability of activated sludge. Environmental Technology, 2013, 34 (22), pp.2995 - 3003. ⟨10.1080/09593330.2013.798001⟩. ⟨hal-01666325⟩ Plus de détails...
S. Akkache, I. Seyssiecq, Nicolas Roche. Effect of exo-polysaccharide concentration in the rheological properties and settling ability of activated sludge. Environmental Technology, 2013, 34 (22), pp.2995 - 3003. ⟨10.1080/09593330.2013.798001⟩. ⟨hal-01666325⟩
Céline Bonnyaud, Raphael Zory, Didier Pradon, Nicolas Vuillerme, Nicolas Roche. Clinical and biomechanical factors which predict Timed Up and Down Stairs test performance in hemiparetic patients. Gait & Posture, 2013, 38 (3), pp.466-470. ⟨10.1016/j.gaitpost.2013.01.015⟩. ⟨hal-02529045⟩ Plus de détails...
Céline Bonnyaud, Raphael Zory, Didier Pradon, Nicolas Vuillerme, Nicolas Roche. Clinical and biomechanical factors which predict Timed Up and Down Stairs test performance in hemiparetic patients. Gait & Posture, 2013, 38 (3), pp.466-470. ⟨10.1016/j.gaitpost.2013.01.015⟩. ⟨hal-02529045⟩
Julien Boudarham, Nicolas Roche, Didier Pradon, Céline Bonnyaud, Djamel Bensmail, et al.. Variations in Kinematics during Clinical Gait Analysis in Stroke Patients. PLoS ONE, 2013, 8 (6), pp.e66421. ⟨10.1371/journal.pone.0066421⟩. ⟨hal-02529041⟩ Plus de détails...
In addition to changes in spatio-temporal and kinematic parameters, patients with stroke exhibit fear of falling as well as fatigability during gait. These changes could compromise interpretation of data from gait analysis. The aim of this study was to determine if the gait of hemiplegic patients changes significantly over successive gait trials. Forty two stroke patients and twenty healthy subjects performed 9 gait trials during a gait analysis session. The mean and variability of spatio-temporal and kinematic joint parameters were analyzed during 3 groups of consecutive gait trials (1-3, 4-6 and 7-9). Principal component analysis was used to reduce the number of variables from the joint kinematic waveforms and to identify the parts of the gait cycle which changed during the gait analysis session. The results showed that i) spontaneous gait velocity and the other spatio-temporal parameters significantly increased, and ii) gait variability decreased, over the last 6 gait trials compared to the first 3, for hemiplegic patients but not healthy subjects. Principal component analysis revealed changes in the sagittal waveforms of the hip, knee and ankle for hemiplegic patients after the first 3 gait trials. These results suggest that at the beginning of the gait analysis session, stroke patients exhibited phase of adaptation,characterized by a ''cautious gait'' but no fatigue was observed.
Julien Boudarham, Nicolas Roche, Didier Pradon, Céline Bonnyaud, Djamel Bensmail, et al.. Variations in Kinematics during Clinical Gait Analysis in Stroke Patients. PLoS ONE, 2013, 8 (6), pp.e66421. ⟨10.1371/journal.pone.0066421⟩. ⟨hal-02529041⟩
Kamel S Zerari, Isabelle Seyssieq, Djamal-Eddine Akretche, Nicolas Roche. Enhancement of oxygen mass transfer coefficients in a hybrid membrane bioreactor. Journal of Chemical Technology and Biotechnology, 2013, 88 (6), pp.1007 - 1013. ⟨10.1002/jctb.4062⟩. ⟨hal-01666331⟩ Plus de détails...
Kamel S Zerari, Isabelle Seyssieq, Djamal-Eddine Akretche, Nicolas Roche. Enhancement of oxygen mass transfer coefficients in a hybrid membrane bioreactor. Journal of Chemical Technology and Biotechnology, 2013, 88 (6), pp.1007 - 1013. ⟨10.1002/jctb.4062⟩. ⟨hal-01666331⟩
Journal: Journal of Chemical Technology and Biotechnology
Ming Zeng, Audrey Soric, Nicolas Roche. Calibration of hydrodynamic behavior and biokinetics for TOC removal modeling in biofilm reactors under different hydraulic conditions. Bioresource Technology, 2013, 144, pp.202-209. ⟨10.1016/j.biortech.2013.06.111⟩. ⟨hal-00978831⟩ Plus de détails...
In this study, total organic carbon (TOC) biodegradation was simulated by GPS-X software in biofilm reactors with carriers of plastic rings and glass beads under different hydraulic conditions. Hydrodynamic model by retention time distribution and biokinetic measurement by in-situ batch test served as two significant parts of model calibration. Experimental results showed that TOC removal efficiency was stable in both media due to the enough height of column, although the actual hydraulic volume changed during the variation of hydraulic condition. Simulated TOC removal efficiencies were close to experimental ones with low theil inequality coefficient values (below 0.15). Compared with glass beads, more TOC was removed in the filter with plastic rings due to the larger actual hydraulic volume and lower half saturation coefficient in spite of its lower maximum specific growth rate of biofilm, which highlighted the importance of calibrating hydrodynamic behavior and biokinetics.
Ming Zeng, Audrey Soric, Nicolas Roche. Calibration of hydrodynamic behavior and biokinetics for TOC removal modeling in biofilm reactors under different hydraulic conditions. Bioresource Technology, 2013, 144, pp.202-209. ⟨10.1016/j.biortech.2013.06.111⟩. ⟨hal-00978831⟩
Kamel Zerari, Isabelle Seyssiecq, Djamal-Eddine Akretche, Nicolas Roche. Enhancement of oxygen mass transfer coefficients in a Membrane Immersed Hybrid Bioreactor. Journal of Chemical Technology and Biotechnology, 2013, 88 (6), pp.1007-1013. ⟨10.1002/jctb.4062⟩. ⟨hal-00968246⟩ Plus de détails...
Oxygen mass transfer is a key parameter for processing aerobic bioreactors in terms of operational costs and efficiency. In membrane bioreactors, a reduction of the aeration capacity is often observed at high solid ratios, caused by the presence of solids and the non-Newtonian properties of activated sludge.
Kamel Zerari, Isabelle Seyssiecq, Djamal-Eddine Akretche, Nicolas Roche. Enhancement of oxygen mass transfer coefficients in a Membrane Immersed Hybrid Bioreactor. Journal of Chemical Technology and Biotechnology, 2013, 88 (6), pp.1007-1013. ⟨10.1002/jctb.4062⟩. ⟨hal-00968246⟩
Journal: Journal of Chemical Technology and Biotechnology
Ming Zeng, Audrey Soric, Jean-Henry Ferrasse, Nicolas Roche. Interpreting hydrodynamic behaviour by the model of stirred tanks in series with exchanged zones: preliminary study in lab-scale trickling filters. Environmental Technology, 2013, 34 (18), pp.2571-2578. ⟨10.1080/09593330.2013.781199⟩. ⟨hal-00978807⟩ Plus de détails...
In trickling filters for wastewater treatment, hydrodynamic behaviour is affected by the growth of biofilm on the porous medium. Therefore, modelling hydrodynamic behaviour is necessary and efficient to predict the biodegradation of pollutants. In this study, laboratory-scale trickling filters were filled with two different porous media (glass beads and plastic rings) and were fed by a synthetic substrate in batch mode. Total organic carbon (TOC) of the effluent was measured and retention time distribution (RTD) was determined by injecting NaCl. Results showed that medium had no significant effect on TOC removal rate (around 80% and 60% respectively for batch time of seven and two days). However, regarding the hydrodynamic behaviour, the effective volume ratio and hydraulic efficiency in the glass beads bed increased remarkably from 28% and 18% to 80% and 70%, respectively, with the reduction of dispersion coefficient (from 4.55 to 1.53). Moreover, the short batch time accelerated this change. Conversely, no variation of hydrodynamic behaviour in plastic rings bed was evident. Along with the feeding of synthetic substrate, biofilm concentration ranged from 1.5 to 10.1 g/L in the glass beads reactor and it achieved around 2.8 g/L in the plastic rings reactor. Hydrodynamic modelling indicated that the model of stirred tanks in series with exchanged zones fitted the experimental results well. These gave values of mobile and immobile volumes of 51 mL and 17 mL, respectively, in the glass beads filter and 25 mL and 15 mL, respectively, in the plastic rings filter.
Ming Zeng, Audrey Soric, Jean-Henry Ferrasse, Nicolas Roche. Interpreting hydrodynamic behaviour by the model of stirred tanks in series with exchanged zones: preliminary study in lab-scale trickling filters. Environmental Technology, 2013, 34 (18), pp.2571-2578. ⟨10.1080/09593330.2013.781199⟩. ⟨hal-00978807⟩
Ana Belén Hernandez, Jean-Henry Ferrasse, Nicolas Roche. Limiting the pollutant content in the sewage sludge producer gas through staged gasification. Chemical Engineering and Technology, 2013, 36 (11), pp.1985-1996. ⟨10.1002/ceat.201300103⟩. ⟨hal-00978823⟩ Plus de détails...
Sewage sludge gasification deals with the release of nitrogen and sulfur compounds, the main sources for pollutants during the final combustion. In order to handle these compounds, a staged gasification process is proposed. During the low-temperature thermal treatment of the first stage, nitrogen and sulfur compounds are removed from the solid fuel. The second stage converts the remaining solid into combustible compounds through gasification reactions. The producer gas obtained during this stage is compared to the producer gas of a simple gasification. The presence of pollutant precursors was considerably diminished during the staged experiments. A successful staged gasification may eliminate the need for downstream cleanup and thus limit the energy consumption. This work proves that staged gasification may be the key to obtain energy from waste fuel, limiting the concerns about pollutants.
Ana Belén Hernandez, Jean-Henry Ferrasse, Nicolas Roche. Limiting the pollutant content in the sewage sludge producer gas through staged gasification. Chemical Engineering and Technology, 2013, 36 (11), pp.1985-1996. ⟨10.1002/ceat.201300103⟩. ⟨hal-00978823⟩
S. Akkache, Isabelle Seyssiecq, Nicolas Roche. Effect of exo-polysaccharide concentration in the rheological properties and settling ability of activated sludge. Environmental Technology, 2013, 34 (22), pp.2995-3003. ⟨10.1080/09593330.2013.798001⟩. ⟨hal-00968262⟩ Plus de détails...
The non-Newtonian properties of activated sludge (AS) suspension lead to transfer limitations (oxygen, substrate...) and operation difficulties in Waste Water Treatment Plants (WWTP). The current approach involves assuming the sludge behaves like water on a rheological point of view, and then oversizing pumping and aeration devices, which represent over 60% of the operating cost in WWTP. The objective of this work is to understand the effect of bioflocculation on the rheological properties and the settling ability of AS suspensions, by means of variations in concentration of exo-cellular polysaccharides. Experiments have been conducted in a 20 L laboratory scale bioreactor at a constant retention time of 20 days and with a total suspended solid concentration between 15 and 20 g L−1.
S. Akkache, Isabelle Seyssiecq, Nicolas Roche. Effect of exo-polysaccharide concentration in the rheological properties and settling ability of activated sludge. Environmental Technology, 2013, 34 (22), pp.2995-3003. ⟨10.1080/09593330.2013.798001⟩. ⟨hal-00968262⟩
Jean-Henry Ferrasse, Sébastien Lefèvre, Rémy Faucherand, Alain Viand, Olivier Boutin. Energetic optimization of wet air oxidation process using experimental design coupled with process simulation. Atomic Energy Review, 2012, 41 (1), pp.175-183. ⟨10.1016/j.energy.2011.09.043⟩. ⟨hal-01297671⟩ Plus de détails...
Wet air oxidation process (WAO) is used for wastewater treatment, especially when it contains high chemical oxygen demand. With non-catalytic processes, temperatures between 200 and 350 °C and pressures between 15 and 30 MPa are generally applied. A method, based on the coupling of simulations and experimental design, is used to compare and optimize two reactors (adiabatic and isotherm), their volume being equal and fixed. The interest of an experimental design approach is to plan simulation and to present results in immediate response surface. Four parameters have been selected; temperature, pressure, chemical oxygen demand, air ratio. After achieving the 25 simulations of the “numerical design”, mass and energy balances were analysed through two energetic values integrated as the design responses: exergetic efficiency and minimum heat required by the process for the functioning. The surface response methodology determines which are the most influencing parameters on design responses. It also shows that temperature of reaction and air ratio are the most influencing parameters. At least elements to calculate the cost of the plant, for both reactors are given. Both reactors allow to get complete degradation of pollutants, but strategy of investment and control are opposite.
Jean-Henry Ferrasse, Sébastien Lefèvre, Rémy Faucherand, Alain Viand, Olivier Boutin. Energetic optimization of wet air oxidation process using experimental design coupled with process simulation. Atomic Energy Review, 2012, 41 (1), pp.175-183. ⟨10.1016/j.energy.2011.09.043⟩. ⟨hal-01297671⟩
Stéphanie Careno, Olivier Boutin, Elisabeth Badens. Drug recrystallisation using supercritical anti-solvent (SAS) process with impinging jets: effects of process parameters. Journal of Crystal Growth, 2012, 342 (1), pp.34-41. ⟨10.1016/j.jcrysgro.2011.06.059⟩. ⟨hal-00993004⟩ Plus de détails...
The aim of this study is to improve mixing in supercritical anti-solvent process (SAS) with impinging jets in order to form finer particles of sulfathiazole, a poorly water-soluble drug. The influence of several process parameters upon the powder characteristics is studied. Parameters are jets' velocity (0.25 m/s to 25.92 m/s), molar ratio solvent/CO2 (2.5% to 20%), temperature (313 K to 343 K), pressure (10 MPa to 20 MPa) and sulfathiazole concentration in the organic solution (0.5% to 1.8%). Two solvents are used: acetone and methanol. Smaller particles with a more homogeneous morphology are obtained from acetone solutions. For the smallest jets' velocity, corresponding to a non-atomized jet, the stable polymorphic form is obtained, pure or in mixture. At this velocity, pressure is the most influential parameter controlling the polymorphic nature of the powder formed. The pure stable polymorph is formed at 20 MPa. Concerning the particle size, the most influential parameters are temperature and sulfathiazole concentration. The use of impinging jets with different process parameters allows the crystallization of four polymorphs among the five known, and particle sizes are varied. This work demonstrates the studied device ability of the polymorph and the size control. A comparison with the classical SAS process shows that particle size, size distribution and morphology of particles crystallized with impinging jets are different from the ones obtained with classical SAS introduction device in similar operating conditions. Mean particle sizes are significantly smaller and size distributions are narrower with impinging jets device.
Stéphanie Careno, Olivier Boutin, Elisabeth Badens. Drug recrystallisation using supercritical anti-solvent (SAS) process with impinging jets: effects of process parameters. Journal of Crystal Growth, 2012, 342 (1), pp.34-41. ⟨10.1016/j.jcrysgro.2011.06.059⟩. ⟨hal-00993004⟩
Audrey Soric, Rémy Césaro, P. Perez, E. Guiol, Philippe Moulin. Eausmose project: desalination by reverse osmosis and batteryless solar energy: design for a 1m3 per day delivery. Desalination, 2012, 301, pp.67-74. ⟨10.1016/j.desal.2012.06.013⟩. ⟨hal-00992892⟩ Plus de détails...
The desalination of seawater or brackish water sees its production capacity increases by the day. In the last 40 years significant progress has been made to reduce production costs and produce drinking water with processes more and more environmentally friendly. Within this framework, a portable desalination prototype with a low environmental impact has been developed and tested. It is based on a reverse osmosis process powered by solar panels without using an intermediate storage battery. The development of an effective energy regulator could lead to a continuous production of desalinated water in the order of 1 m3/d.
Audrey Soric, Rémy Césaro, P. Perez, E. Guiol, Philippe Moulin. Eausmose project: desalination by reverse osmosis and batteryless solar energy: design for a 1m3 per day delivery. Desalination, 2012, 301, pp.67-74. ⟨10.1016/j.desal.2012.06.013⟩. ⟨hal-00992892⟩
A. Soric, R. Cesaro, P. Perez, E. Guiol, P. Moulin. Eausmose Project–desalination by Reverse Osmosis and Batteryless Solar Energy: Design for a 1m3 Per Day Delivery. Procedia Engineering, 2012, 44, pp.1465 - 1467. ⟨10.1016/j.proeng.2012.08.830⟩. ⟨hal-01889584⟩ Plus de détails...
A. Soric, R. Cesaro, P. Perez, E. Guiol, P. Moulin. Eausmose Project–desalination by Reverse Osmosis and Batteryless Solar Energy: Design for a 1m3 Per Day Delivery. Procedia Engineering, 2012, 44, pp.1465 - 1467. ⟨10.1016/j.proeng.2012.08.830⟩. ⟨hal-01889584⟩
Olivier Boutin. Influence of introduction devices on crystallisation kinetic parameters in a supercritical antisolvent process. Journal of Crystal Growth, 2012, 342 (1), pp.13-20. ⟨10.1016/j.jcrysgro.2010.11.099⟩. ⟨hal-00992991⟩ Plus de détails...
Supercritical CO2 antisolvent processes developed in this work are based on two different introduction devices: the Concentric Tube Antisolvent Reactor (a capillary centred in a larger tube) and the Impinging Jet Technology (organic solution and supercritical CO2 impinging face to face). Griseofulvin pharmaceutical compound is chosen to test those two processes. The different experimental results indicate the same trends as classical supercritical antisolvent process for the evolution of particle size and particle size distribution with process parameters (mainly concentrations and flow rates). The second and main part is dedicated to the use of these experimental results for deriving modelling evaluation. Concerning this part, it is first shown that, in a first approximation, these processes can be represented by a continuous, mixed suspension and mixed product removal crystallizer. This allows modelling the mass particle size distribution. It also allows giving some numerical data on kinetics parameters (nucleation and growth). Secondly, general kinetic laws are derived for each process. In particular in the case of the impinging jet technology, the energy dissipated in the medium by the flow rates must be included in the crystallisation kinetic law.
Olivier Boutin. Influence of introduction devices on crystallisation kinetic parameters in a supercritical antisolvent process. Journal of Crystal Growth, 2012, 342 (1), pp.13-20. ⟨10.1016/j.jcrysgro.2010.11.099⟩. ⟨hal-00992991⟩
G.H. Lopes, B. Bernales Chavez, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Prediction of Permeate Flux and Rejection Rate in RO and NF Membrane Processes: Numerical Modelling of Hydrodynamics and Mass Transfer Coupling. Procedia Engineering, 2012, 44, pp.1934-1936. ⟨10.1016/j.proeng.2012.09.001⟩. ⟨hal-01299944⟩ Plus de détails...
G.H. Lopes, B. Bernales Chavez, Nelson Ibaseta, Pierrette Guichardon, Pierre Haldenwang. Prediction of Permeate Flux and Rejection Rate in RO and NF Membrane Processes: Numerical Modelling of Hydrodynamics and Mass Transfer Coupling. Procedia Engineering, 2012, 44, pp.1934-1936. ⟨10.1016/j.proeng.2012.09.001⟩. ⟨hal-01299944⟩
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins in a stirred reactor: numerical modelling. Chemical Engineering Science, 2012, 69 (1), pp.170-180. ⟨10.1016/j.ces.2011.10.016⟩. ⟨hal-00993023⟩ Plus de détails...
Supercritical water oxidation offers a viable alternative treatment to destroy the organic structure of Ion Exchange Resins. In order to design and define appropriate dimensions for the supercritical oxidation reactor, a 2D simulation of the fluid dynamics and heat transfer during the oxidation process has been investigated. The solver used is a commercial code, Fluent® 6.3. The turbulent flow field in the reactor, created by the stirrer is taken into account with a k−ω model and a swirl imposed to the fluid. Particle trajectories are modelled with the Discrete Random Walk Particle Model. For the solubilization of the particles in supercritical water, a mechanism has been proposed and implemented into Fluent® software through the Eddy Dissipation Concept approach, taking into account the identified rate determining species. Simulation results provide results on the flow, temperature fields and oxidation localization inside the reactor. For the reactive particles-supercritical water flow model, the effect of parameters, such as feed flow rates or stirring velocity, can be focussed. Reaction temperature is predicted with deviation lower than 15%. Degradation conversions are in good agreement with experimental ones.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins in a stirred reactor: numerical modelling. Chemical Engineering Science, 2012, 69 (1), pp.170-180. ⟨10.1016/j.ces.2011.10.016⟩. ⟨hal-00993023⟩
S. Moussiere, A. Roubaud, Olivier Boutin, Pierrette Guichardon, B. Fournel, et al.. 2D and 3D CFD modelling of a reactive turbulent flow in a double shell supercritical water oxidation reactor. Journal of Supercritical Fluids, 2012, 65, pp.25-31. ⟨10.1016/j.supflu.2012.02.019⟩. ⟨hal-00992976⟩ Plus de détails...
In order to design and define appropriate dimensions for a supercritical oxidation reactor, a comparative 2D and 3D simulation of the fluid dynamics and heat transfer during an oxidation process has been performed. The solver used is a commercial code, Fluent 6.2®. The turbulent flow field in the reactor, created by the stirrer, is taken into account with a k-ω model and a swirl imposed to the fluid. In the 3D case the rotation of the stirrer can be modelled using the sliding mesh model and the moving reference frame model. This work allows comparing 2D and 3D velocity and heat transfer calculations. The predicted values (mainly species concentrations and temperature profiles) are of the same order in both cases. The reactivity of the system is taken into account with a classical Eddy Dissipation Concept combustion model. Comparisons with experimental temperature measurements validate the ability of the CFD modelling to simulate the supercritical water oxidation reactive medium. Results indicate that the flow can be considered as plug flow-like and that heat transfer is strongly enhanced by the stirring.
S. Moussiere, A. Roubaud, Olivier Boutin, Pierrette Guichardon, B. Fournel, et al.. 2D and 3D CFD modelling of a reactive turbulent flow in a double shell supercritical water oxidation reactor. Journal of Supercritical Fluids, 2012, 65, pp.25-31. ⟨10.1016/j.supflu.2012.02.019⟩. ⟨hal-00992976⟩
Sébastien Lefèvre, Olivier Boutin, Jean-Henry Ferrasse, Laure Malleret, Rémy Faucherand, et al.. Thermodynamic and kinetic study of phenol degradation by a non-catalytic wet air oxidation process. Chemosphere, 2011, 84 (9), pp.1208-1215. ⟨10.1016/j.chemosphere.2011.05.049⟩. ⟨hal-01297674⟩ Plus de détails...
This work is dedicated to an accurate evaluation of thermodynamic and kinetics aspects of phenol degradation using wet air oxidation process. Phenol is a well known polluting molecule and therefore it is important having data of its behaviour during this process. A view cell is used for the experimental study, with an internal volume of 150 mL, able to reach pressures up to 30 MPa and temperatures up to 350 °C. Concerning the thermodynamic phase equilibria, experimental and modelling results are obtained for different binary systems (water/nitrogen, water/air) and ternary system (water/nitrogen/phenol). The best model is the Predictive Soave Redlich Kwong one. This information is necessary to predict the composition of the gas phase during the process. It is also important for an implementation in a process simulation. The second part is dedicated to kinetics evaluation of the degradation of phenol. Different compounds have been detected using GC coupled with a MS. A kinetic scheme is deduced, taking into account the evolution of phenol, hydroquinones, catechol, resorcinol and acetic acid. The kinetic parameters are calculated for this scheme. These data are important to evaluate the evolution of the concentration of the different polluting molecules during the process. A simplified kinetic scheme, which can be easily implemented in a process simulation, is also determined for the direct degradation of phenol into H2O and CO2. The Arrhenius law data obtained for the phenol disappearance are the following: k = 1.8 × 106 ± 3.9 × 105 M−1 s−1 (pre-exponential factor) and Ea = 77 ± 8 kJ mol−1 (activation energy).
Sébastien Lefèvre, Olivier Boutin, Jean-Henry Ferrasse, Laure Malleret, Rémy Faucherand, et al.. Thermodynamic and kinetic study of phenol degradation by a non-catalytic wet air oxidation process. Chemosphere, 2011, 84 (9), pp.1208-1215. ⟨10.1016/j.chemosphere.2011.05.049⟩. ⟨hal-01297674⟩
A. B. Hernandez, Jean-Henry Ferrasse, Perrine Chaurand, Hans Saveyn, Daniel Borschneck, et al.. Mineralogy and leachability of gasified sewage sludge solid residues. Journal of Hazardous Materials, 2011, 191 (1-3), pp.219-227. ⟨10.1016/j.jhazmat.2011.04.070⟩. ⟨hal-00766629⟩ Plus de détails...
Gasification of sewage sludge produces combustible gases as well as tar and a solid residue as by-products. This must be taken into account when determining the optimal thermal conditions for the gasification process. In this study, the influence of temperature, heating atmosphere and residence time on the characteristics of the gasified sewage sludge residues is investigated. ICP-AES analyses reveal that the major chemical elements in the char residues are phosphorus, calcium, iron and silicon. Heavy metals such as copper, zinc, chromium, nickel and lead are also present at relatively high levels - from 50 to more than 1000 mg/kg of dry matter. The major mineral phases' identification - before and after heating as well as their morphology and approximate chemistry (XRD and SEM-EDX) demonstrate that a number of transformations take place during gasification. These are influenced by the reactor's temperature and the oxidative degree of its internal atmosphere. The copper-, zinc- and chromium-bearing phases are studied using chemometric tools, showing that the distribution of those metals among the mineral phases is considerably different. Finally, batch-leaching tests reveal that metals retained in the residue are significantly stabilized after thermal treatment to a higher or lower extent, depending on the thermal conditions applied.
A. B. Hernandez, Jean-Henry Ferrasse, Perrine Chaurand, Hans Saveyn, Daniel Borschneck, et al.. Mineralogy and leachability of gasified sewage sludge solid residues. Journal of Hazardous Materials, 2011, 191 (1-3), pp.219-227. ⟨10.1016/j.jhazmat.2011.04.070⟩. ⟨hal-00766629⟩
Sebastien Lefevre, Jean-Henry Ferrasse, Olivier Boutin, Michelle Sergent, Rémy Faucherand, et al.. Process optimisation using the combination of simulation and experimental design approach: Application to wet air oxidation. Chemical Engineering Research and Design, 2011, 89 (7), pp.1045-1055. ⟨10.1016/j.cherd.2010.12.009⟩. ⟨hal-01292658⟩ Plus de détails...
This study develops a coupling of energetic and experimental design approaches on a given configuration of wet air oxidation process (WAO), applied for wastewater containing a hard chemical oxygen demand (phenol for instance). Taking into account thermodynamic principles and process simulation, the calculation of minimum heat required by the process, exergetic efficiency and work balance is presented. Five parameters are considered: pressure (20–30 MPa); temperature (200–300 °C); chemical oxygen demand (23–143 g l−1); air ratio (1.2–2) and temperature of exiting steam utilities (160–200 °C). Using the surface response method, it appears that initial chemical oxygen demand and temperature are the two parameters that mainly influence the result. With the modelling, good conditions for the functioning of the presented process are the following: pressure of 19.4 MPa, temperature of 283 °C, chemical oxygen demand of 54.9 g l−1, air ratio of 1.7 and vapour temperature of 183 °C.
Sebastien Lefevre, Jean-Henry Ferrasse, Olivier Boutin, Michelle Sergent, Rémy Faucherand, et al.. Process optimisation using the combination of simulation and experimental design approach: Application to wet air oxidation. Chemical Engineering Research and Design, 2011, 89 (7), pp.1045-1055. ⟨10.1016/j.cherd.2010.12.009⟩. ⟨hal-01292658⟩
Audrey Soric, Jean-Henry Ferrasse, Nicolas Roche. Microcalorimetric qualitative analysis of biofilm development in porous media used in wastewater treatment by constructed wetland. Journal of Thermal Analysis and Calorimetry, 2011, 104 (1), pp.113-118. ⟨10.1007/s10973-010-1252-4⟩. ⟨hal-01197444⟩ Plus de détails...
Audrey Soric, Jean-Henry Ferrasse, Nicolas Roche. Microcalorimetric qualitative analysis of biofilm development in porous media used in wastewater treatment by constructed wetland. Journal of Thermal Analysis and Calorimetry, 2011, 104 (1), pp.113-118. ⟨10.1007/s10973-010-1252-4⟩. ⟨hal-01197444⟩
Journal: Journal of Thermal Analysis and Calorimetry
Diffusion coefficient is an important property in chemical industry and precise measurements can be achieved by electrochemical techniques. Study of ferrocene diffusion was carried out in 1-hexyl-3-methyl imidazolium hexafluorophosphate-dense CO2 ([C6MIM][PF6–CO2]) biphasic system using microelectrode technique. Diffusion coefficients were determined by cyclic voltammetry and Randles–Ševčík relationship in the temperature and pressure ranging from 303.15 to 333.15 K and 1–10 MPa, respectively. Computed phase simulations were also used. Two-phase system was determined whatever experimental conditions and composition tested. Volumes of heavy and light phase were estimated as well. Both electroanalytical and computed studies showed that [C6MIM][PF6]–CO2 biphasic system containing initial molar fraction of CO2 up to 0.9 can be used without decrease in diffusion coefficient values. The order of magnitude of these diffusion coefficients of ferrocene in greener aprotic media is about 10−6 m2 s−1. Theoretical analysis of ferrocene mass transport was also carried out using Sutherland formula and viscosity model based on Eyring's absolute rate theory. Dramatic decrease in [C6MIM][PF6]-CO2 mixture viscosity with x(CO2) was estimated by calculations.
Sébastien Chanfreau, Bing Yu, Liang-Nian He, Olivier Boutin. Electrochemical determination of ferrocene diffusion coefficient in [C6MIM][PF6]–CO2 biphasic system. Journal of Supercritical Fluids, 2011, 56 (2), pp.130-136. ⟨10.1016/j.supflu.2011.01.003⟩. ⟨hal-01297679⟩
Jean-Henry Ferrasse, C. Dumas, Nicolas Roche. Experimental results and model for N-gas compound production in pure steam gasification for wastewater sewage sludge. Chemical Engineering and Technology, 2011, 34 (1), pp.103-110. ⟨10.1002/ceat.201000328⟩. ⟨hal-01025265⟩ Plus de détails...
Sewage sludge produced in wastewater treatment plants represent a significant portion of waste resulting from human activity and it is important to offer new ways of treatment. Thermal gasification of sludge is a promising thermal treatment, particularly because it can lead to a recovery of energy and a drastic reduction in the initial waste volume. However, it is a subject that has rarely been treated in the literature for sewage sludge. In particular, the nitrogen compounds present in significant quantities in the sewage sludge and their reactions during a thermal gasification step, must necessarily be taken into account. In order to study nitrogen behavior, this paper presents experimental results that are included in a model to predict NH3 emission.
Jean-Henry Ferrasse, C. Dumas, Nicolas Roche. Experimental results and model for N-gas compound production in pure steam gasification for wastewater sewage sludge. Chemical Engineering and Technology, 2011, 34 (1), pp.103-110. ⟨10.1002/ceat.201000328⟩. ⟨hal-01025265⟩
Olivier Boutin, F. Charton, F. Fenoul. Extraction par eau subcritique. F. Chemat. Eco-extraction du vegetal, Dunod, pp.259--283, 2011. ⟨hal-01313538⟩ Plus de détails...
Laurène Lesoin, Olivier Boutin, Christelle Crampon, Elisabeth Badens. CO2/water/surfactant ternary systems and liposome formation using supercritical CO2: a review. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011, 377 (1-3), pp.1-14. ⟨10.1016/j.colsurfa.2011.01.027⟩. ⟨hal-01044546⟩ Plus de détails...
The aim of this review is to explain the various phenomena involved in liposome formation using dense gas processes and especially supercritical CO2. Before liposome formation, the review focuses on the phase behavior of CO2/water/surfactant ternary systems. First of all, the two main cases of CO2/water/surfactant fluid phase behavior are studied: reverse micelle systems and Winsor systems. Then, the various mechanisms of emulsion destabilization as a function of formulation variables (pressure, temperature and water content) are tackled. Influence of formulation variables is also addressed in the case of liposome formation during depressurization and CO2 release for dense gas techniques. Techniques using supercritical or subcritical conditions are classified according to the hydration way: in the first case, hydration is carried out under pressure and in the second one, hydration is achieved after depressurization. Hydration under pressure involves the formation of a CO2/water/surfactant system which is not the case when hydration is carried out during depressurization. An emergent tendency in liposome formation may be noted: (i) large unilamellar vesicles would appear when hydration is achieved under pressure, i.e. when liposomes are the result of two phase inversions (inversion phase from water-in-CO2 emulsion to CO2-in-water emulsion and inversion phase from CO2-in-water emulsion to liposomes); (ii) multilamellar vesicles would be formed when hydration is realized during depressurization, i.e. when liposomes are the result of one phase inversion (inversion phase from CO2-in-water to liposomes). Lastly, a model of liposome formation is developed.
Laurène Lesoin, Olivier Boutin, Christelle Crampon, Elisabeth Badens. CO2/water/surfactant ternary systems and liposome formation using supercritical CO2: a review. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011, 377 (1-3), pp.1-14. ⟨10.1016/j.colsurfa.2011.01.027⟩. ⟨hal-01044546⟩
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Olivier Boutin, Axel de Nadai, Antonio Garcia Perez, Jean-Henry Ferrasse, Marina Beltran, et al.. Experimental and modelling of supercritical oil extraction from rapeseeds and sunflower seeds. Chemical Engineering Research and Design, 2011, 89 (11), pp.2477-2484. ⟨10.1016/j.cherd.2011.02.032⟩. ⟨hal-01044569⟩ Plus de détails...
The supercritical oil extraction from oleaginous seeds (sunflower and rapeseeds) is presented here through experimental and modelling results. The experimental setup allows an accurate following of the mass of the oil extracted and to derive the experimental influences of pressure, temperature and supercritical CO2 flowrate on the extraction curves. These parameters are very sensitive and highlight the necessity of precise optimisation of experimental conditions. In order to complete the behaviour of supercritical fluids extraction, an improved modelling is proposed. The modelling basic equations are based on others modelling published previously. In this work, the determination of several parameters comes from correlations and the other constants are fitted with all the experimental results. Thus the modelling is more representative and predictive as other ones. The modelling results present a good agreement with the experimental results, and hence it can be used for the dimensioning of some extraction autoclaves.
Olivier Boutin, Axel de Nadai, Antonio Garcia Perez, Jean-Henry Ferrasse, Marina Beltran, et al.. Experimental and modelling of supercritical oil extraction from rapeseeds and sunflower seeds. Chemical Engineering Research and Design, 2011, 89 (11), pp.2477-2484. ⟨10.1016/j.cherd.2011.02.032⟩. ⟨hal-01044569⟩
L. Clouzot, Nicolas Roche, B. Marrot. Effect of membrane bioreactor configurations on sludge structure and microbial activity. Bioresource Technology, 2011, 102 (2), pp.975-981. ⟨10.1016/j.biortech.2010.09.058⟩. ⟨hal-01292667⟩ Plus de détails...
The aim of this paper was to determine the effect of two different membrane bioreactor (MBR) configurations (external/immersed) on sludge structure and microbial activity. Sludge structure was deduced from rheological measurements. The high shear stress induced by the recirculation pump in the external MBR was shown to result in decreasing viscosity due to activated sludge (AS) deflocculation. Besides, soluble microbial products (SMP) release was higher in the external MBR (5 mgCOD gMLVSS−1) than in the immersed configuration (2 mgCOD gMLVSS−1). Microbial activity was followed from respirometry tests by focusing on the distinction between heterotrophs and autotrophs. An easier autotrophic microbe development was then observed in the immersed MBR compared to the external one. However, the external MBR was shown to allow better heterotrophic microbe development.
L. Clouzot, Nicolas Roche, B. Marrot. Effect of membrane bioreactor configurations on sludge structure and microbial activity. Bioresource Technology, 2011, 102 (2), pp.975-981. ⟨10.1016/j.biortech.2010.09.058⟩. ⟨hal-01292667⟩
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Development of a continuous dense gas process for the production of liposomes. Journal of Supercritical Fluids, 2011, 60, pp.51-62. ⟨10.1016/j.supflu.2011.04.018⟩. ⟨hal-01044574⟩ Plus de détails...
A new process called Continuous Anti-Solvent (CAS) process was developed for the production of liposomes using supercritical CO2. Unlike the current dense gas technologies, CAS method is a single step and continuous process. Preliminary experiments were conducted in semi-batch mode to determine the most suitable operating conditions (stirring speed = 225 rpm; water/lecithin mass ratio = 21) to ensure an efficient phase mixing in the autoclave. Then, two procedures were developed for the CAS process in the continuous mode. According to the results, the single exit procedure enhances the phase mixing in the autoclave with the formation of a CO2-in-water emulsion which is a good precursor to liposome formation. Liposomes prepared with the CAS method (P = 9 MPa; T = 308 K; CO2 flow rate = 0.3 kg h−1; organic solution flow rate = 240 mL h−1; water flow rate = 180 mL h−1) are spherical and multilamellar with a medium diameter included between 10 and 100 μm.
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Development of a continuous dense gas process for the production of liposomes. Journal of Supercritical Fluids, 2011, 60, pp.51-62. ⟨10.1016/j.supflu.2011.04.018⟩. ⟨hal-01044574⟩
Olivier Boutin, J.H. Ferrasse, S. Lefèvre. Procédés d’oxydation en voie humide. Weka. Techniques de l’Ingénieur, 6030, 2011. ⟨hal-01313537⟩ Plus de détails...
Hans Saveyn, J.H. Ferrasse, A. B. Hernandez, J. Rose, Paul van Der Meeren, et al.. The Distribution of Heavy Metals Following Sewage Sludge Gasification
. Journal of Residuals Science and Technology, 2011, 8 (2), pp.61-66. ⟨hal-01300386⟩ Plus de détails...
Limited knowledge exists about the fate of inorganic components, and especially metallic species, present in sewage sludge, upon gasification. This study shows that major elements are mainly retained within the sludge char, whereas minor elements such as Cd, Pb, Zn, As and Hg are partially or completely lost due to volatilization or melting from the sludge matrix. Hence, this work stresses the importance of monitoring the metal distribution during the gasification process.
Hans Saveyn, J.H. Ferrasse, A. B. Hernandez, J. Rose, Paul van Der Meeren, et al.. The Distribution of Heavy Metals Following Sewage Sludge Gasification
. Journal of Residuals Science and Technology, 2011, 8 (2), pp.61-66. ⟨hal-01300386⟩
Journal: Journal of Residuals Science and Technology
Christelle Crampon, Olivier Boutin, Elisabeth Badens. Supercritical carbon dioxide extraction of molecules of interest from microalgae and seaweeds. Industrial and engineering chemistry research, 2011, 50 (15), pp.8941-8953. ⟨10.1021/ie102297d⟩. ⟨hal-01044580⟩ Plus de détails...
The purpose of this paper is to guide lectors in the extraction of algal (microalgae and seaweeds) compounds using supercritical carbon dioxide (SC-CO2) from dry biomass. It proposes a review of 30 articles dealing with the SC-CO2 extraction of molecules of interest from microalgae and seaweeds. Among these papers, 20 are devoted to microalgae. The most extracted compounds are neutral lipids and antioxidants. Several operating conditions have been tested: pressures from 7.8 to 70 MPa, temperatures from 313.15 to 349.15 K, and CO2/algae mass ratio from 6 to 500. All extraction studies were performed at laboratory scale, with the masses of dry algae powder never exceeding 180 g. Extraction yields vary significantly with operating conditions: pressure seems to be the most influential parameter. The higher the pressure, the higher the yields and/or the faster the extraction kinetics. Temperature also has an influence, but its effect is dependent on pressure (retrograde behavior). Moreover, as expected, it is advised to work with a high CO2/algae mass ratio. From these works, it appears that, to perform an efficient extraction with SC-CO2, the influence of the algae pretreatment is highly significant. The first step is a centrifugation. The resulting concentrated algal suspension must then undergo a drying operation, which is generally freeze-drying or low-temperature drying. Finally, the algae are crushed. Concerning the influence of crushing, the reported results show that, as expected, the smaller the particles, the more rapid the extraction kinetics and/or the higher the yields.
Christelle Crampon, Olivier Boutin, Elisabeth Badens. Supercritical carbon dioxide extraction of molecules of interest from microalgae and seaweeds. Industrial and engineering chemistry research, 2011, 50 (15), pp.8941-8953. ⟨10.1021/ie102297d⟩. ⟨hal-01044580⟩
Journal: Industrial and engineering chemistry research
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Preparation of liposomes using the supercritical anti-solvent (SAS) process and comparison with a conventional method. Journal of Supercritical Fluids, 2011, 57 (2), pp.162-174. ⟨10.1016/j.supflu.2011.01.006⟩. ⟨hal-01044553⟩ Plus de détails...
Two methods to produce liposomes encapsulating a fluorescent marker were compared: the supercritical anti-solvent (SAS) method and a conventional one (Bangham). Liposome size and encapsulation efficiency were measured to assess the methods. Micronized lecithin produced by the SAS process was characterized in terms of particle size, morphology and residual solvent content in order to investigate the influence of experimental parameters (pressure, CO2/solvent molar ratio and solute concentration). It appears that when the lecithin concentration increases from 15 to 25 wt.%, at 9 MPa and 308 K, larger (20-60 μm) and less aggregated lecithin particles are formed. As concerns liposomes formed from SAS processed lecithin, size distribution curves are mainly bimodal, spreading in the range of 0.1-100 μm. Liposome encapsulation efficiencies are including between 10 and 20%. As concerns the Bangham method, more dispersed liposomes were formed; encapsulation efficiencies were about 20%, and problems of reproducibility have been raised.
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Preparation of liposomes using the supercritical anti-solvent (SAS) process and comparison with a conventional method. Journal of Supercritical Fluids, 2011, 57 (2), pp.162-174. ⟨10.1016/j.supflu.2011.01.006⟩. ⟨hal-01044553⟩
E. Barbot, I. Seyssiecq, Nicolas Roche, B. Marrot. Inhibition of activated sludge respiration by sodium azide addition: Effect on rheology and oxygen transfer. Journal Chemical Engineering, 2010, 163 (3), pp.230-235. ⟨10.1016/j.cej.2010.07.050⟩. ⟨hal-01297615⟩ Plus de détails...
Although microorganism respiration inhibition by sodium azide (NaN3) is used in some studies to identify activated sludge adsorption capacity, little is known about the effect of this compound on the suspension properties. In this study we have investigated the effect of NaN3 addition on both volumetric oxygen mass transfer coefficient and rheology of activated sludge (AS) suspensions in a 1.9 L bioreactor. The rheological properties (shear thinning one) of AS suspensions with and without NaN3 addition are measured in situ (triphasic conditions). It appears that NaN3 addition leads to a deflocculation of AS suspensions and thus a decrease in apparent viscosity. A small amount of suspended solids was added in order to obtain identical apparent viscosities (under 1.2 or 46.3 s−1) for AS suspensions with and without NaN3 addition. KLa values were then measured in both respiring and non-respiring suspensions for different air flow rates (2, 3 or 4 L/min) and under low or high mechanical shear rate (1.2 or 46.3 s−1). Results show that under high mechanical shear rate, the respiration state for a given air flow rate does not impact the KLa values. On the contrary, under low mechanical shear rate, NaN3 addition induces an increase of KLa values in comparison with those obtained with the respiring biomass. This effect, for a same apparent viscosity, is attributed to the deflocculation observed in the presence of NaN3. Indeed, AS with and without NaN3 addition used for the KLa measurements induce a modification of the floc internal structure, corresponding to smaller floc size in the case of NaN3 addition.
E. Barbot, I. Seyssiecq, Nicolas Roche, B. Marrot. Inhibition of activated sludge respiration by sodium azide addition: Effect on rheology and oxygen transfer. Journal Chemical Engineering, 2010, 163 (3), pp.230-235. ⟨10.1016/j.cej.2010.07.050⟩. ⟨hal-01297615⟩
Pierre Haldenwang, Pierrette Guichardon, Guillaume Chiavassa, N. Ibaseta. Exact solution to mass transfer in Berman flow: application to concentration polarization combined with osmosis in crossflow membrane filtration. International Journal of Heat and Mass Transfer, 2010, 53 (19-20), pp.3898-3904. ⟨10.1016/j.ijheatmasstransfer.2010.05.008⟩. ⟨hal-00907275⟩ Plus de détails...
Concentration polarization affects numerous systems of membrane separation, and combined with osmosis, it can cause substantial reductions in permeation. We establish an exact solution to the conservation law of a solute advected by Berman flow. This flow is characteristic of reverse osmosis or nanofiltration. The resulting concentration polarization is then combined with the osmosis (counter-) effect. For large Péclet number of permeation, it yields a rigorous support to the semi-empirical "film" model, and accounts for the limit flux phenomenon. The main results are summarized in a simple diagram that relates three different Péclet numbers, and show that polarization combined with osmosis can withstand operating pressure almost totally.
Pierre Haldenwang, Pierrette Guichardon, Guillaume Chiavassa, N. Ibaseta. Exact solution to mass transfer in Berman flow: application to concentration polarization combined with osmosis in crossflow membrane filtration. International Journal of Heat and Mass Transfer, 2010, 53 (19-20), pp.3898-3904. ⟨10.1016/j.ijheatmasstransfer.2010.05.008⟩. ⟨hal-00907275⟩
Journal: International Journal of Heat and Mass Transfer
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins: degradation mechanisms. Process Safety and Environmental Protection, 2010, 88 (3), pp.213-222. ⟨10.1016/j.psep.2009.11.001⟩. ⟨hal-01025162⟩ Plus de détails...
Spent ion exchange resins are radioactive process wastes for which there is no satisfactory industrial treatment. Supercritical water oxidation could offer a viable treatment alternative to destroy the organic structure of resins and contain radioactivity. IER degradation experiments were carried out in a continuous supercritical water reactor. Total organic carbon degradation rates in the range of 95-98% were obtained depending on operating conditions. GC-MS chromatography analyses were carried out to determine intermediate products formed during the reaction. Around 50 species were identified for cationic and anionic resins. Degradation of polystyrenic structure leads to the formation of low molecular weight compounds. Benzoic acid, phenol and acetic acid are the main compounds. However, other products are detected in appreciable yields such as phenolic species or heterocycles, for anionic IERs degradation. Intermediates produced by intramolecular rearrangements are also obtained. A radical degradation mechanism is proposed for each resin. In this overall mechanism, several hypotheses are foreseen, according to HOOradical dot radical attack sites.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins: degradation mechanisms. Process Safety and Environmental Protection, 2010, 88 (3), pp.213-222. ⟨10.1016/j.psep.2009.11.001⟩. ⟨hal-01025162⟩
Journal: Process Safety and Environmental Protection
Yohann Dumont, Patrick Aujollet, Jean-Henry Ferrasse. Use of a heat pump to supply energy to the Iodine-sulphur thermochemical cycle for hydrogen production. International Journal of Chemical Reactor Engineering, 2010, 8 (1), pp.1542-6580. ⟨10.2202/1542-6580.2105⟩. ⟨hal-01024750⟩ Plus de détails...
The hydrogen world consumption should increase significantly to progressively replace hydrocarbons. Due to its high power density, nuclear reactor should take an important place in this production. This paper focuses on the hydrogen production by thermochemical cycle using the heat available at 900°C of a new generation nuclear reactor. The chosen thermochemical cycle for this study is the iodine-sulphur thermochemical cycle water splitting.The process flowsheet under consideration has high total energy consumption. It has also many local energy needs unevenly distributed over a wide temperature range. The raw distribution of this energy gives a hydrogen production efficiency of 14.0%. To improve this, the proposed coupling is built using an energy distribution network with a coolant to meet the safety requirements. In this simple case, the efficiency of hydrogen production comes to 21.9%. By integrating a heat pump into the energy distribution network, the efficiency of production increases to 42.0%. The exergetic efficiency, increases from 59.3% to 85.8%.
Yohann Dumont, Patrick Aujollet, Jean-Henry Ferrasse. Use of a heat pump to supply energy to the Iodine-sulphur thermochemical cycle for hydrogen production. International Journal of Chemical Reactor Engineering, 2010, 8 (1), pp.1542-6580. ⟨10.2202/1542-6580.2105⟩. ⟨hal-01024750⟩
Journal: International Journal of Chemical Reactor Engineering
Samuel Legros, Perrine Chaurand, Jérôme Rose, Armand Masion, Valérie Briois, et al.. Investigation of Copper Speciation in Pig Slurry by a Multitechnique Approach. Environmental Science and Technology, 2010, 44 (18), pp.6926-6932. ⟨10.1021/es101651w⟩. ⟨hal-01426133⟩ Plus de détails...
It is now well-known that copper (Cu) can accumulate on the surface of soils upon which pig slurry has been applied. This is due to the high quantity of Cu in pig slurry resulting from its use as a growth promoter in animal feeds. The mobility and bioavailability of Cu from pig slurry spreading can be better predicted by determining the speciation of this element in addition to its total concentration. The aim of this study was to present a multitechnique approach to investigate Cu speciation in pig slurry. First, size fractionation and chemical characterization of each size fraction were performed to complement results obtained in raw samples. Micro X-ray fluorescence spectroscopy (mu XRF) highlighted the colocalization of Cu and sulfur (S). Finally, X-ray absorption near-edge structure spectroscopy (XANES) showed that Cu speciation in raw pig slurry and size fractions could be described by Cu(2)S and that its oxidation state is Cu(I). In addition, geochemical calculation demonstrated that chalcocite (Cu(2)S) was the major Cu species present under pig slurry lagoon physical-chemical conditions. This Cu speciation in pig slurry may be the main reason for the observed Cu accumulation at the soil surface.
Samuel Legros, Perrine Chaurand, Jérôme Rose, Armand Masion, Valérie Briois, et al.. Investigation of Copper Speciation in Pig Slurry by a Multitechnique Approach. Environmental Science and Technology, 2010, 44 (18), pp.6926-6932. ⟨10.1021/es101651w⟩. ⟨hal-01426133⟩
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Ion exchange resins destruction in a stirred supercritical water oxidation reactor. Journal of Supercritical Fluids, 2010, 51 (3), pp.369-375. ⟨10.1016/j.supflu.2009.08.017⟩. ⟨hal-01025175⟩ Plus de détails...
Spent ion exchange resins (IERs) are radioactive process wastes for which there is no satisfactory industrial treatment. Supercritical water oxidation offers a viable treatment alternative to destroy the organic structure of resins, used to remove radioactivity. Up to now, studies carried out in supercritical water for IER destruction showed that degradation rates higher than 99% are difficult to obtain even using a catalyst or a large oxidant excess. In this study, a co-fuel, isopropanol, has been used in order to improve degradation rates by initiating the oxidation reaction and increasing temperature of the reaction medium. Concentrations up to 20 wt% were tested for anionic and cationic resins. Total organic carbon reduction rates higher than 99% were obtained from this process, without the use of a catalyst. The influence of operating parameters such as IERs feed concentration, nature and counterions of exchanged IERs were also studied.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Ion exchange resins destruction in a stirred supercritical water oxidation reactor. Journal of Supercritical Fluids, 2010, 51 (3), pp.369-375. ⟨10.1016/j.supflu.2009.08.017⟩. ⟨hal-01025175⟩
S. Lefèvre, J.H. Ferrasse, Rémy Faucherand, Alain Viand, Olivier Boutin. Energy Optimisation of Wet Air Oxidation Process Based on the Preliminary Study on Liquid-Vapour Equilibrium. Chemical Engineering Transactions, 2010, 21, pp.835-840. ⟨10.3303/CET1021140⟩. ⟨hal-01300396⟩ Plus de détails...
Wet air oxidation process is used to treat wastewater with high chemical oxygen demand. Temperatures up to 350°C and pressures up to 30 MPa, are operated to develop a non-catalytic process. In the literature, there is some data about the phase equilibrium of water-air system but on larger domains and not accurate enough in our range. To study the process, it is necessary to complete the data with adapted pressures, temperatures and compositions. An experimental set-up has been developed to realise equilibrium measurements as well as trials on waste degradation. It consists of a stirred reactor of 150 mL equipped with two sapphire windows (diameter 4.1 cm) allowing a total visualization of the reactive chamber. The results of experiments give the volume occupied by the liquid and the gas phases, for a combination of temperature, pressure and global composition. Measurements are realised to establish dew curves for water-air, water-nitrogen and water-waste-nitrogen systems. Nitrogen has the same behaviour as oxygen and can replace it in mixtures for the phases equilibrium studies with the waste to avoid any reaction. The presence of the waste, in the concentrations studied, has no significant influence on the equilibrium points. Those data serve to model the liquid-vapour equilibrium in the appropriate domain first with an ideal model and then with equation of state Soave-Redlich-Kwong and appropriate mixing rules. Those equilibrium models are then included in commercial engineering software to simulate WAO processes. With the objective to develop a process energetically optimised, the second part of this work is dedicated to perform energy balances for each component and for the whole process
S. Lefèvre, J.H. Ferrasse, Rémy Faucherand, Alain Viand, Olivier Boutin. Energy Optimisation of Wet Air Oxidation Process Based on the Preliminary Study on Liquid-Vapour Equilibrium. Chemical Engineering Transactions, 2010, 21, pp.835-840. ⟨10.3303/CET1021140⟩. ⟨hal-01300396⟩
Ludiwine Clouzot, Pierre Doumenq, Nicolas Roche, Benoît Marrot. Kinetic parameters for 17α-ethinylestradiol removal by nitrifying activated sludge developed in a membrane bioreactor. Bioresource Technology, 2010, 101 (16), pp.6425-6431. ⟨10.1016/j.biortech.2010.03.039⟩. ⟨hal-01024728⟩ Plus de détails...
The synthetic hormone 17α-ethinylestradiol (EE2) is primarily removed in wastewater treatment plants (WWTPs) by sorption, and nitrifying biomass has been shown to be responsible for EE2 biodegradation. Membrane bioreactor (MBR) technology was chosen to develop a community of autotrophic, nitrifying micro-organisms and determine kinetic parameters for EE2 biodegradation. Biological inhibition by azide was applied to differentiate sorption from biodegradation. Activated sludge (AS) was acclimated in the MBR to a substrate specific to autotrophic biomass and resulted in an increase in nitrifying activity. Acclimated AS was used to successfully biodegrade EE2 (11% increase in EE2 removal), and the overall removal of EE2 was determined to be 99% (sorption + biodegradation). AS used directly from a WWTP without acclimation removed EE2 only through sorption (88% removal of EE2). Therefore, higher nitrifying activity developed by acclimating AS allowed almost complete removal of EE2.
Ludiwine Clouzot, Pierre Doumenq, Nicolas Roche, Benoît Marrot. Kinetic parameters for 17α-ethinylestradiol removal by nitrifying activated sludge developed in a membrane bioreactor. Bioresource Technology, 2010, 101 (16), pp.6425-6431. ⟨10.1016/j.biortech.2010.03.039⟩. ⟨hal-01024728⟩
B Calvignac, Olivier Boutin. The impinging jets technology: A contacting device using a SAS process type. Powder Technology, 2008, 191, pp.200 - 205. ⟨10.1016/j.powtec.2008.10.009⟩. ⟨hal-03505780⟩ Plus de détails...
Supercritical CO 2 can be used as anti-solvent in many processes. It permits to micronize molecules dissolved in an appropriate organic solvent. In this work, Griseofulvin has been chosen as solute to be micronized using a Supercritical Anti-Solvent process type. The aim is to validate and compare a new mixing device based on the impinging jets technology. This technique consists of arranging two jets in face to face position in order to generate a zone of high turbulence and favour the mass transfer. Experiments have been conducted at 10 MPa and 313 K. Injection velocities have been varied from 0.7 to 13 m s − 1 and the geometric factor from 4 to 27. This work permits to bring to the fore the significant influence of operating parameters and geometric parameters of the impinging jets device, (jets velocity, impinging distance, organic solvent, solute concentration) on particle size and particle size distribution. Compared to traditional SAS process, this device allows a significant reduction on particles size from few millimetres to 10 μm. The use of this new device seems to have a significant interest.
B Calvignac, Olivier Boutin. The impinging jets technology: A contacting device using a SAS process type. Powder Technology, 2008, 191, pp.200 - 205. ⟨10.1016/j.powtec.2008.10.009⟩. ⟨hal-03505780⟩
S. Moussiere, C. Joussot-Dubien, P. Guichardon, Olivier Boutin, H.-A. Turc, et al.. Modelling of heat transfer and hydrodynamic with two kinetics approaches during supercritical water oxidation process. Journal of Supercritical Fluids, 2007, 43 (2), pp.324-332. ⟨10.1016/j.supflu.2007.06.008⟩. ⟨cea-02512107⟩ Plus de détails...
Supercritical water oxidation is an innovative and very efficient process to treat hazardous organic waste. In order to better understand the complex physic phenomena involved in this process, and to design more efficient reactors or to insure future efficient scale-up, a simulation with the Computational Fluid Dynamics software FLUENT was carried out for a simple tubular reactor. The turbulent non-reactive flow is well-represented using the $\kappa-\epsilon$ model. Nevertheless, the $\kappa-\epsilon$ model gives better results when a source term is added to take into account the chemical reaction. Two approaches are used to model the reaction rate: an Arrhenius law and the Eddy Dissipation Concept (EDC) generally used to describe combustion reactions. The results of this simulation using Arrhenius law, are in good agreement with experimental data although a simple thermohydraulic model was used. Moreover, the sensitiveness to the inlet temperature has been demonstrated. It influences the reaction start-up and the shape of the measured wall temperature peak. Equally, the simulated temperature profiles using Eddy Dissipation Concept model are in good agreement with experimental ones. Hence, the two approaches give similar results. Nevertheless, the EDC model predicts more precisely the thermal peak location at the reactor wall.
S. Moussiere, C. Joussot-Dubien, P. Guichardon, Olivier Boutin, H.-A. Turc, et al.. Modelling of heat transfer and hydrodynamic with two kinetics approaches during supercritical water oxidation process. Journal of Supercritical Fluids, 2007, 43 (2), pp.324-332. ⟨10.1016/j.supflu.2007.06.008⟩. ⟨cea-02512107⟩
Anne-Margot Paulaime, Isabelle Seyssiecq, Stéphane A Veesler. The influence of organic additives on the crystallization and agglomeration of gibbsite. Powder Technology, 2003, 130 (1-3), pp.345 - 351. ⟨10.1016/S0032-5910(02)00214-0⟩. ⟨hal-01745715⟩ Plus de détails...
Anne-Margot Paulaime, Isabelle Seyssiecq, Stéphane A Veesler. The influence of organic additives on the crystallization and agglomeration of gibbsite. Powder Technology, 2003, 130 (1-3), pp.345 - 351. ⟨10.1016/S0032-5910(02)00214-0⟩. ⟨hal-01745715⟩
J-H Ferrasse, I. Seyssiecq, N. Roche. Les procédés de gazéification comme alternative pour la valorisation de boues de stations d'épuration des eaux usées. Environnement, Ingénierie & Développement, 2003, N°30 - 2ème Trimestre 2003, pp.20-24. ⟨10.4267/dechets-sciences-techniques.2446⟩. ⟨hal-03178157⟩ Plus de détails...
Le devenir des boues de stations d'épuration des eaux usées (Step) est un problème crucial posé aux pays industrialisés. En effet la quantité de boues produite en Step ne va cesser d’augmenter avec les croissances démographique et économique, ainsi que le nombre et la performance des Step des eaux usées. Actuellement, le traitement des boues de Step se fait par différentes filières, dont le nombre est limité. Quel que soit le devenir de ces filières et sans créer de polémiques particulières elles ne pourront, dans tous les cas, pas absorber ce volume croissant. Il devient dès lors nécessaire de diversifier les méthodes de traitement pour répondre aux problèmes posés par la gestion de ce déchet. Dans ce cadre, les nouvelles filières de traitement par valorisation thermochimiques semblent des plus intéressantes. En effet, elles présentent en plus de la capacité de traitement, l’avantage de produire des composés « stockables » et facilement «valorisables». Nous traiterons ainsi, dans cet article, de l'intérêt de développer les procédés de gazéification des boues de Step.
J-H Ferrasse, I. Seyssiecq, N. Roche. Les procédés de gazéification comme alternative pour la valorisation de boues de stations d'épuration des eaux usées. Environnement, Ingénierie & Développement, 2003, N°30 - 2ème Trimestre 2003, pp.20-24. ⟨10.4267/dechets-sciences-techniques.2446⟩. ⟨hal-03178157⟩
Journal: Environnement, Ingénierie & Développement
Isabelle Seyssiecq, Stéphane A Veesler, Gérard Pèpe, Roland Boistelle. The influence of additives on the crystal habit of gibbsite. Journal of Crystal Growth, 1999, 196 (1), pp.174 - 180. ⟨10.1016/S0022-0248(98)00724-6⟩. ⟨hal-01745653⟩ Plus de détails...
Isabelle Seyssiecq, Stéphane A Veesler, Gérard Pèpe, Roland Boistelle. The influence of additives on the crystal habit of gibbsite. Journal of Crystal Growth, 1999, 196 (1), pp.174 - 180. ⟨10.1016/S0022-0248(98)00724-6⟩. ⟨hal-01745653⟩
I. Seyssiecq, S. Veesler, R. Boistelle, J.M. Lamérant. Agglomeration of gibbsite Al(OH)3 crystals in Bayer liquors. Influence of the process parameters. Chemical Engineering Science, 1998, 53 (12), pp.2177 - 2185. ⟨10.1016/S0009-2509(98)00032-3⟩. ⟨hal-01745517⟩ Plus de détails...
I. Seyssiecq, S. Veesler, R. Boistelle, J.M. Lamérant. Agglomeration of gibbsite Al(OH)3 crystals in Bayer liquors. Influence of the process parameters. Chemical Engineering Science, 1998, 53 (12), pp.2177 - 2185. ⟨10.1016/S0009-2509(98)00032-3⟩. ⟨hal-01745517⟩
I. Seyssiecq, S. Veesler, R. Boistelle. A non-immersed induction conductivity system for controlling supersaturation in corrosive media: the case of gibbsite crystals agglomeration in Bayer liquors. Journal of Crystal Growth, 1996, 169 (1), pp.124 - 128. ⟨10.1016/0022-0248(96)00313-2⟩. ⟨hal-01745509⟩ Plus de détails...
I. Seyssiecq, S. Veesler, R. Boistelle. A non-immersed induction conductivity system for controlling supersaturation in corrosive media: the case of gibbsite crystals agglomeration in Bayer liquors. Journal of Crystal Growth, 1996, 169 (1), pp.124 - 128. ⟨10.1016/0022-0248(96)00313-2⟩. ⟨hal-01745509⟩
