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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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⟩
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
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⟩
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⟩
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⟩
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⟩
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
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
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⟩
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⟩
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⟩
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⟩
J. X. Sheng, A. Ysasi, Dmitry Kolomenskiy, E. Kanso, M. Nitsche, et al.. Simulating vortex wakes of flapping plates. Childress S. and all. Natural Locomotion in Fluids and on Surfaces: Swimming, Flying, and Sliding, Springer Science+Business Media, pp.255-262, 2012, The IMA Volumes in Mathematics and its Applications, 978-1-4614-3996-7. ⟨10.1007/978-1-4614-3997-4_21⟩. ⟨hal-01032453⟩ Plus de détails...
We compare different models to simulate two-dimensional vortex wakes behind oscillating plates. In particular, we compare solutions using a vortex sheet model and the simpler Brown-Michael model to solutions of the full Navier-Stokes equations obtained using a penalization method. The goal is to determine whether simpler models can be used to obtain good approximations to the form of the wake and the induced forces on the body.
J. X. Sheng, A. Ysasi, Dmitry Kolomenskiy, E. Kanso, M. Nitsche, et al.. Simulating vortex wakes of flapping plates. Childress S. and all. Natural Locomotion in Fluids and on Surfaces: Swimming, Flying, and Sliding, Springer Science+Business Media, pp.255-262, 2012, The IMA Volumes in Mathematics and its Applications, 978-1-4614-3996-7. ⟨10.1007/978-1-4614-3997-4_21⟩. ⟨hal-01032453⟩
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⟩
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
