Directrice des Études de seconde année du DUT de Chimie, IUT d'Aix-Marseille
Activités
Rhéologie des fluides complexes appliquée à
l’optimisation de procédé (boues de station d'épuration) ou au
biomédical (mucus bronchique)
Bioréacteur Hybride à biomasses libres et
fixées (traitement tertiaire de molécules type micro-polluants)
Publications scientifiques au M2P2
2021
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⟩
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⟩
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⟩
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⟩
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
H. Riahi, Marcello Meldi, Julien Favier, Eric Serre, Eric Goncalves da Silva. A pressure-corrected Immersed Boundary Method for the numerical simulation of compressible flows. Journal of Computational Physics, 2018, 374, pp.361-383. ⟨10.1016/j.jcp.2018.07.033⟩. ⟨hal-01859760⟩ Plus de détails...
The development of an improved new IBM method is proposed in the present article. This method roots in efficient proposals developed for the simulation of incompressible flows, and it is expanded for compressible configurations. The main feature of this model is the integration of a pressure-based correction of the IBM forcing which is analytically derived from the set of dynamic equations. The resulting IBM method has been integrated in various flow solvers available in the CFD platform OpenFOAM. A rigorous validation has been performed considering different test cases of increasing complexity. The results have been compared with a large number of references available in the literature of experimental and numerical nature. This analysis highlights numerous favorable characteristics of the IBM method, such as precision, flexibility and computational cost efficiency.
H. Riahi, Marcello Meldi, Julien Favier, Eric Serre, Eric Goncalves da Silva. A pressure-corrected Immersed Boundary Method for the numerical simulation of compressible flows. Journal of Computational Physics, 2018, 374, pp.361-383. ⟨10.1016/j.jcp.2018.07.033⟩. ⟨hal-01859760⟩
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
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⟩
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⟩
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⟩
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⟩
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⟩
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
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⟩
B. Viaud, Eric Serre, Jean-Marc Chomaz. Transition to turbulence through steep global-modes cascade in an open rotating cavity. Journal of Fluid Mechanics, 2011, 688, pp.493-506. ⟨10.1017/jfm.2011.393⟩. ⟨hal-00998000⟩ Plus de détails...
B. Viaud, Eric Serre, Jean-Marc Chomaz. Transition to turbulence through steep global-modes cascade in an open rotating cavity. Journal of Fluid Mechanics, 2011, 688, pp.493-506. ⟨10.1017/jfm.2011.393⟩. ⟨hal-00998000⟩
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⟩
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⟩
