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Prof. Pierre Buffière
INSA - Université de Lyon, Lyon, France

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Research Keywords & Expertise

0 Anaerobic Digestion
0 Modelling
0 Process Engineering
0 Resource Recovery
0 biological wastewater treatment

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Anaerobic Digestion
Modelling
Resource Recovery

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Journal article
Published: 14 July 2021 in Bioresource Technology
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In a circular economy approach, heterogeneous wastes can be upgraded to energy in the form of syngas via pyrogasification, and then to methane via biomethanation. Working at high pressure is a promising approach to intensify the process and to reduce gas–liquid transfer limitations. However, raising the pressure could lead to reaching the CO inhibition threshold of the microorganisms involved in syngas-biomethanation. To investigate the impact on pressure on the process, a 10L continuous stirred tank reactor working at 4 bars and 55 °C was implemented. Syngas (40% CO, 40% H2, 20% CO2) biomethanation was performed successfully and methane productivity as high as 6.8 mmolCH4/Lreactor/h with almost full conversion of CO (97%) and H2 (98%) was achieved. CO inhibition was investigated and carboxydotrophs appeared less resistant to high CO exposition than methanogens.

ACS Style

J. Figueras; H. Benbelkacem; C. Dumas; P. Buffiere. “Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column”. Bioresource Technology 2021, 338, 125548 .

AMA Style

J. Figueras, H. Benbelkacem, C. Dumas, P. Buffiere. “Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column”. Bioresource Technology. 2021; 338 ():125548.

Chicago/Turabian Style

J. Figueras; H. Benbelkacem; C. Dumas; P. Buffiere. 2021. "“Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column”." Bioresource Technology 338, no. : 125548.

Journal article
Published: 11 February 2021 in Chemical Engineering Journal
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The optimization of full-scale digesters requires the development of models able to describe the main process performances, due to the strategic role of anaerobic digestion in the sustainability of Water Resource Recovery Facilities (WRRF). In this study, an extended version of the Anaerobic Digestion Model No 1 (ADM1) was developed to simulate the long-term performances of a full-scale anaerobic digester treating primary and activated sludge of a large WWRF (300 000 pe). Monitored data were collected over 973 days and analyzed in order to provide reconciled datasets for modeling purposes. A comprehensive influent characterization in terms of biodegradability extent, COD and N content was carried out by combining measurements of several parameters and Biochemical Methane Potential (BMP) tests to provide an ADM1 compatible substrate fractionation. The model was calibrated by comparing simulation results against both routinely measurements and data from a dedicated measuring campaign. Disintegration coefficients and particulate inert fractions were the sole estimated model parameters. Disintegration coefficients determined in the calibration step resulted in values 5-times greater than those initially estimated from BMP tests. The model was able to accurately predict digestate composition in terms of TSS, VSS, COD, N and P content as well as methane content and biogas production rate. It was demonstrated that a precise description of the anaerobic co-digestion of sewage sludges relies on the estimation of solubilization kinetic parameters together with the use of two different composite variables representing each substrate. The developed model proved to be a useful tool that can be integrated in a plant-wide model to assess plant process interactions under different operating conditions.

ACS Style

Guillermo Baquerizo; Justine Fiat; Pierre Buffiere; Romain Girault; Sylvie Gillot. Modelling the dynamic long-term performance of a full-scale digester treating sludge from an urban WRRF using an extended version of ADM1. Chemical Engineering Journal 2021, 423, 128870 .

AMA Style

Guillermo Baquerizo, Justine Fiat, Pierre Buffiere, Romain Girault, Sylvie Gillot. Modelling the dynamic long-term performance of a full-scale digester treating sludge from an urban WRRF using an extended version of ADM1. Chemical Engineering Journal. 2021; 423 ():128870.

Chicago/Turabian Style

Guillermo Baquerizo; Justine Fiat; Pierre Buffiere; Romain Girault; Sylvie Gillot. 2021. "Modelling the dynamic long-term performance of a full-scale digester treating sludge from an urban WRRF using an extended version of ADM1." Chemical Engineering Journal 423, no. : 128870.

Journal article
Published: 10 October 2020 in Water
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Biochemical methane potential (BMP) is essential to determine the production of methane for various substrates; literature shows important discrepancies for the same substrates. In this paper, a harmonized BMP protocol was developed and tested with two phases of BMP tests carried out by eleven French laboratories. Surprisingly, for the three same solid tested substrates (straw; raw mix and dried-shredded mix of potatoes, maize, beef meat and straw; and mayonnaise), the standard deviations of the repeatability and reproducibility inter-laboratory were not enhanced by the harmonized protocol (average of about 25% depending on the substrate), as compared to a previous step where all laboratories used their own protocols. Moreover, statistical analyses of all the results, after removal of the outliers (about 15% of all observations), did not highlight significant effect of the operational effect on BMP (stirring, automatic or manual gas quantification, use of trace metal, uses a bicarbonate buffer, inoculum to substrate ratio) at least for the tested ranges. On the other hand, the average intra-laboratory repeatability was low, about 7%, whatever the protocol, the substrate and the laboratory. It also appears that drying the SA substrate, which contained proteins, carbohydrates, lipids and fibers, does not impact its BMP.

ACS Style

Thierry Ribeiro; Romain Cresson; Sébastien Pommier; Sébastien Preys; Laura André; Fabrice Béline; Théodore Bouchez; Claire Bougrier; Pierre Buffière; Jesús Cacho; Patricia Camacho; Laurent Mazéas; André Pauss; Philippe Pouech; Maxime Rouez; Michel Torrijos. Measurement of Biochemical Methane Potential of Heterogeneous Solid Substrates: Results of a Two-Phase French Inter-Laboratory Study. Water 2020, 12, 2814 .

AMA Style

Thierry Ribeiro, Romain Cresson, Sébastien Pommier, Sébastien Preys, Laura André, Fabrice Béline, Théodore Bouchez, Claire Bougrier, Pierre Buffière, Jesús Cacho, Patricia Camacho, Laurent Mazéas, André Pauss, Philippe Pouech, Maxime Rouez, Michel Torrijos. Measurement of Biochemical Methane Potential of Heterogeneous Solid Substrates: Results of a Two-Phase French Inter-Laboratory Study. Water. 2020; 12 (10):2814.

Chicago/Turabian Style

Thierry Ribeiro; Romain Cresson; Sébastien Pommier; Sébastien Preys; Laura André; Fabrice Béline; Théodore Bouchez; Claire Bougrier; Pierre Buffière; Jesús Cacho; Patricia Camacho; Laurent Mazéas; André Pauss; Philippe Pouech; Maxime Rouez; Michel Torrijos. 2020. "Measurement of Biochemical Methane Potential of Heterogeneous Solid Substrates: Results of a Two-Phase French Inter-Laboratory Study." Water 12, no. 10: 2814.

Journal article
Published: 26 June 2020 in Water
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The objectives of this study were to: (1) quantify differences in biochemical methane potential (BMP) measured using three measurement methods, including two popular methods (a commercial automated system (AMPTS II) and manual manometric) and one newer method (gravimetric), and (2) assess the importance of the mixing position in the measurement sequence. Powdered microcrystalline cellulose was used as the substrate in simultaneous tests. All methods gave similar results (4 production from blanks. This effect may be linked to a fraction of CH4 that remains dissolved or even as attached bubbles, and suggests that mixing before measurement is preferable. The automated volumetric and gravimetric methods (mode 2) gave very similar mean BMP values (1% different). However, kinetic analysis showed that methane production was faster with the automated volumetric method. This could come from an error in the estimation of the CH4 production rate for the automated method, or an increase in the degradation rate due to better mixing. Both automatic volumetric and manual gravimetric measurements met current validation criteria for mean cellulose BMP, but the RSD from the automated system exceeded the limit.

ACS Style

Corrado Amodeo; Sasha D. Hafner; Rúben Teixeira Franco; Hassen Benbelkacem; Paul Moretti; Rémy Bayard; Pierre Buffière. How Different Are Manometric, Gravimetric, and Automated Volumetric BMP Results? Water 2020, 12, 1839 .

AMA Style

Corrado Amodeo, Sasha D. Hafner, Rúben Teixeira Franco, Hassen Benbelkacem, Paul Moretti, Rémy Bayard, Pierre Buffière. How Different Are Manometric, Gravimetric, and Automated Volumetric BMP Results? Water. 2020; 12 (6):1839.

Chicago/Turabian Style

Corrado Amodeo; Sasha D. Hafner; Rúben Teixeira Franco; Hassen Benbelkacem; Paul Moretti; Rémy Bayard; Pierre Buffière. 2020. "How Different Are Manometric, Gravimetric, and Automated Volumetric BMP Results?" Water 12, no. 6: 1839.

Journal article
Published: 15 February 2020 in Molecules
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Different methods were tested to evaluate the performance of a pretreatment before anaerobic digestion. Besides conventional biochemical parameters, such as the biochemical methane potential (BMP), the methane production rate, or the extent of solubilization of organic compounds, methods for physical characterization were also developed in the present work. Criteria, such as the particle size distribution, the water retention capacity, and the rheological properties, were thus measured. These methods were tested on samples taken in two full-scale digesters operating with cattle manure as a substrate and using hammer mills. The comparison of samples taken before and after the pretreatment unit showed no significant improvement in the methane potential. However, the methane production rate increased by 15% and 26% for the two hammer mills, respectively. A relevant improvement of the rheological properties was also observed. This feature is likely correlated with the average reduction in particle size during the pretreatment operation, but these results needs confirmation in a wider range of systems.

ACS Style

Helen Coarita Fernandez; Diana Amaya Ramirez; Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. Methods for the Evaluation of Industrial Mechanical Pretreatments before Anaerobic Digesters. Molecules 2020, 25, 860 .

AMA Style

Helen Coarita Fernandez, Diana Amaya Ramirez, Ruben Teixeira Franco, Pierre Buffière, Rémy Bayard. Methods for the Evaluation of Industrial Mechanical Pretreatments before Anaerobic Digesters. Molecules. 2020; 25 (4):860.

Chicago/Turabian Style

Helen Coarita Fernandez; Diana Amaya Ramirez; Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2020. "Methods for the Evaluation of Industrial Mechanical Pretreatments before Anaerobic Digesters." Molecules 25, no. 4: 860.

Article
Published: 16 January 2020 in The Canadian Journal of Chemical Engineering
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Mass transfer coefficients at the gas ‐ liquid interface were investigated for different flow configuration systems, a stirred tank reactor and a gravity pipe. Computational fluid dynamics (CFD) simulations were performed for all tested experimental conditions. Since a poorly soluble gas (oxygen) was used, the overall mass transfer coefficient was clearly correlated to the hydrodynamic conditions in the liquid phase. However, a generic correlation between averaged interfacial liquid velocity and mass transfer coefficients was not found for both geometries. Finally, the averaged turbulent kinetic energy (TKE) at the interface is the most relevant parameter that was correlated to the mass transfer coefficient for both systems. The same relationship between oxygen mass transfer coefficient KL, O2 and TKE () can be applied for the two geometries investigated. This article is protected by copyright. All rights reserved.

ACS Style

Fanny Springer; Lucie Carrera; Gislain Lipeme Kouyi; Alejandro Claro‐Barreto; Pierre Buffiere. The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface. The Canadian Journal of Chemical Engineering 2020, 98, 1191 -1201.

AMA Style

Fanny Springer, Lucie Carrera, Gislain Lipeme Kouyi, Alejandro Claro‐Barreto, Pierre Buffiere. The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface. The Canadian Journal of Chemical Engineering. 2020; 98 (5):1191-1201.

Chicago/Turabian Style

Fanny Springer; Lucie Carrera; Gislain Lipeme Kouyi; Alejandro Claro‐Barreto; Pierre Buffiere. 2020. "The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface." The Canadian Journal of Chemical Engineering 98, no. 5: 1191-1201.

Journal article
Published: 01 July 2018 in Bioresource Technology
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The role of the hydrolytic stage in high solids temperature phased anaerobic digestion was investigated with a mixture of cattle slurry and maize silage with variable ratios (100, 70 and 30% volatile solids coming from cattle slurry). It was incubated for 48 h at 37, 55, 65 and 72 °C. Soluble chemical oxygen demand and biochemical methane potential were measured at 0, 24 and 48 h. Higher temperatures improved the amount of solubilized COD, which confirmed previously reported results. Nevertheless, solubilization mostly took place during the first 24 h. The rate of methane production in post-hydrolysis BMPs increased after 48 h hydrolysis time, but not after 24 h. The first order kinetic constant rose by 40% on average. No correlation was observed between soluble COD and downstream methane production rate, indicating a possible modification of the physical structure of the particulate solids during the hydrolytic stage.

ACS Style

P. Buffière; M. Dooms; S. Hattou; Hassen Benbelkacem. The hydrolytic stage in high solids temperature phased anaerobic digestion improves the downstream methane production rate. Bioresource Technology 2018, 259, 111 -118.

AMA Style

P. Buffière, M. Dooms, S. Hattou, Hassen Benbelkacem. The hydrolytic stage in high solids temperature phased anaerobic digestion improves the downstream methane production rate. Bioresource Technology. 2018; 259 ():111-118.

Chicago/Turabian Style

P. Buffière; M. Dooms; S. Hattou; Hassen Benbelkacem. 2018. "The hydrolytic stage in high solids temperature phased anaerobic digestion improves the downstream methane production rate." Bioresource Technology 259, no. : 111-118.

Journal article
Published: 07 June 2018 in Chemical Engineering Journal
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A stoechio-kinetic model describing the evolution of biomass through the ensiling process was developed. The model framework is based on the ADM1 in order to establish a mathematical link between ensiling and anaerobic digestion. Data from ensiling experiments with catch crop and cattle manure were used for model implementation. The model accurately describes the evolution of chemical species under most of storage conditions. Only very few adjusted parameters varied among the tested conditions, notably certain kinetic coefficients. These coefficients depend on the nature and biochemical characteristics of the feedstock. Simulations of the conservation of the biomethane potential were qualitatively consistent with the experimental results. However, additional reactions or inhibitory phenomena should be added to enhance quantitative reliability of this parameter in some cases. Simulations results show that hydrolysis reactions have low kinetic constants during ensiling (0.001-0.012 d-1). Furthermore, different tolerance levels to pH and dryness among microbial populations were identified. Lactic acid bacteria can proliferate at low pH and low moisture content. The remaining fermentative microorganisms, such as clostridial bacteria, are more sensitive to low pH conditions. Moreover, this model illustrates that the conservation of methane potential is positively correlated with the content of easily accessible carbohydrates and total solids in the raw material. This work can be a support tool for the management of resources before anaerobic digestion.

ACS Style

Ruben Teixeira Franco; Rémy Bayard; Pierre Buffière. Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion. Chemical Engineering Journal 2018, 350, 872 -882.

AMA Style

Ruben Teixeira Franco, Rémy Bayard, Pierre Buffière. Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion. Chemical Engineering Journal. 2018; 350 ():872-882.

Chicago/Turabian Style

Ruben Teixeira Franco; Rémy Bayard; Pierre Buffière. 2018. "Mathematical modelling of the ensiling process before biogas production: Strengthening the links between biomass storage and anaerobic digestion." Chemical Engineering Journal 350, no. : 872-882.

Journal article
Published: 01 June 2018 in Renewable Energy
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ACS Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. Co-ensiling of cattle manure before biogas production: Effects of fermentation stimulants and inhibitors on biomass and methane preservation. Renewable Energy 2018, 121, 315 -323.

AMA Style

Rúben Teixeira Franco, Pierre Buffière, Rémy Bayard. Co-ensiling of cattle manure before biogas production: Effects of fermentation stimulants and inhibitors on biomass and methane preservation. Renewable Energy. 2018; 121 ():315-323.

Chicago/Turabian Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2018. "Co-ensiling of cattle manure before biogas production: Effects of fermentation stimulants and inhibitors on biomass and methane preservation." Renewable Energy 121, no. : 315-323.

Original paper
Published: 03 March 2018 in Waste and Biomass Valorization
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The impacts of storage conditions, total solids content and silage additives were investigated at laboratory scale for cattle manure during up to 120 days. Wheat straw was used as co-substrate in the study of the effects of total solids content. Glucose and starch were used as model molecules of sugar-rich co-substrates. Single-handedly cattle manure lost 37% of its original methane potential after 120 days of anaerobic storage. This was essentially caused by the low total solids content and by the absence of water soluble carbohydrates in the feedstock. Wheat straw addition decreased moisture content and enabled cattle manure stabilization for a pH of 6.0. In contrast, extensive heterofermentative lactic acid bacteria fermentation occurred during co-ensiling with glucose and the pH quickly dropped to values below 4.0. Starch was used as substrate for fermentation but its hydrolysis limited bacterial activity and acidification. Finally, all the three co-substrates led to minimal methane potential losses after 120 days of storage. Co-ensiling will improve the energy efficiency of agricultural biogas plants that use stored cattle manure as feedstock.

ACS Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. Effects of Storage Conditions, Total Solids Content and Silage Additives on Fermentation Profiles and Methane Preservation of Cattle Manure Before Anaerobic Digestion. Waste and Biomass Valorization 2018, 9, 2307 -2317.

AMA Style

Ruben Teixeira Franco, Pierre Buffière, Rémy Bayard. Effects of Storage Conditions, Total Solids Content and Silage Additives on Fermentation Profiles and Methane Preservation of Cattle Manure Before Anaerobic Digestion. Waste and Biomass Valorization. 2018; 9 (12):2307-2317.

Chicago/Turabian Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2018. "Effects of Storage Conditions, Total Solids Content and Silage Additives on Fermentation Profiles and Methane Preservation of Cattle Manure Before Anaerobic Digestion." Waste and Biomass Valorization 9, no. 12: 2307-2317.

Journal article
Published: 01 January 2018 in Déchets, sciences et techniques
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ACS Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. Maîtrise de la gestion des fumiers de bovin avant méthanisation : un enjeu clé pour optimiser la production de biogaz. Déchets, sciences et techniques 2018, 1 .

AMA Style

Ruben Teixeira Franco, Pierre Buffière, Rémy Bayard. Maîtrise de la gestion des fumiers de bovin avant méthanisation : un enjeu clé pour optimiser la production de biogaz. Déchets, sciences et techniques. 2018; (N°78):1.

Chicago/Turabian Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2018. "Maîtrise de la gestion des fumiers de bovin avant méthanisation : un enjeu clé pour optimiser la production de biogaz." Déchets, sciences et techniques , no. N°78: 1.

Original articles
Published: 27 October 2017 in Biofuels
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The effects of ensiling and open-air storage on the conservation of cattle manure were investigated for 120 days at laboratory scale. The impact of co-ensiling with wheat straw was assessed as well. Up to 74% of methane potential was lost during aerobic storage. Negligible energetic losses and ammonia emissions occurred during the first month of anaerobic preservation. However, inadequate chemical properties of fresh cattle manure hindered silage stabilization for extended periods, leading to 46% methane losses after 4 months. Co-ensiling of cattle manure with wheat straw enhanced biomass acidification, inducing a conservation of more than 86% of the methane potential after 4 months. Wheat straw addition suppressed ammonia production and limited the risks of losses through liquid effluent. The current study proves that long-term conservation of cattle manure can be achieved if correct management practices are used, which will undoubtedly improve the performance of biogas plants with this raw material.

ACS Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. Cattle manure for biogas production. Does ensiling and wheat straw addition enhance preservation of biomass and methane potential? Biofuels 2017, 11, 671 -682.

AMA Style

Rúben Teixeira Franco, Pierre Buffière, Rémy Bayard. Cattle manure for biogas production. Does ensiling and wheat straw addition enhance preservation of biomass and methane potential? Biofuels. 2017; 11 (6):671-682.

Chicago/Turabian Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2017. "Cattle manure for biogas production. Does ensiling and wheat straw addition enhance preservation of biomass and methane potential?" Biofuels 11, no. 6: 671-682.

Journal article
Published: 01 May 2017 in Biomass and Bioenergy
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ACS Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. Optimizing storage of a catch crop before biogas production: Impact of ensiling and wilting under unsuitable weather conditions. Biomass and Bioenergy 2017, 100, 84 -91.

AMA Style

Rúben Teixeira Franco, Pierre Buffière, Rémy Bayard. Optimizing storage of a catch crop before biogas production: Impact of ensiling and wilting under unsuitable weather conditions. Biomass and Bioenergy. 2017; 100 ():84-91.

Chicago/Turabian Style

Rúben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2017. "Optimizing storage of a catch crop before biogas production: Impact of ensiling and wilting under unsuitable weather conditions." Biomass and Bioenergy 100, no. : 84-91.

Journal article
Published: 08 February 2017 in Water Science and Technology
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H2S emission dynamics in sewers are conditioned by the mass transfer coefficient at the interface. This work aims at measuring the variation of the mass transfer coefficient with the hydraulic characteristics, with the objective of estimating H2S emission in gravity pipes, and collecting data to establish models independent of the system geometry. The ratio between the H2S and O2 mass transfer coefficient was assessed in an 8 L mixed reactor under different experimental conditions. Then, oxygen mass transfer measurements were performed in a 10 m long gravity pipe. The following ranges of experimental conditions were investigated: velocity flow [0–0.61 m.s−1], Reynolds number [0–23,333]. The hydrodynamic parameters at the liquid/gas interface were calculated by computational fluid dynamics (CFD). In the laboratory-scale reactor, the O2 mass transfer coefficient was found to depend on the stirring rate (rph) as follows: KL,O2 = 0.016 + 0.025 N3.85. A KL,H2S/KL,O2 ratio of 0.64 ± 0.24 was found, in accordance with previously published data. CFD results helped in refining this correlation: the mass transfer coefficient depends on the local interface velocity ui (m.h−1): KL,O2 = 0.016 + 1.02 × 10−5ui3.85 In the gravity pipe device, KL,O2 also exponentially increased with the mean flow velocity. These trends were found to be consistent with the increasing level of turbulence.

ACS Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient. Water Science and Technology 2017, 75, 1899 -1908.

AMA Style

Lucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient. Water Science and Technology. 2017; 75 (8):1899-1908.

Chicago/Turabian Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2017. "Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient." Water Science and Technology 75, no. 8: 1899-1908.

Journal article
Published: 02 January 2017 in Water Science and Technology
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Problems related to hydrogen sulfide may be serious for both network stakeholders and the public in terms of health, sustainability of the sewer structure and urban comfort. H2S emission models are generally theoretical and simplified in terms of environmental conditions. Although air transport characteristics in sewers must play a role in the fate of hydrogen sulfide, only a limited number of studies have investigated this issue. The aim of this study was to better understand H2S liquid to gas transfer by highlighting the link between the mass transfer coefficient and the turbulence in the air flow and the water flow. For experimental safety reasons, O2 was taken as a model compound. The oxygen mass transfer coefficients were obtained using a mass balance in plug flow. The mass transfer coefficient was not impacted by the range of the interface air-flow velocity values tested (0.55–2.28 m·s−1) or the water velocity values (0.06–0.55 m·s–1). Using the ratio between kL,O2 to kL,H2S, the H2S mass transfer behavior in a gravity pipe in the same hydraulic conditions can be predicted.

ACS Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers. Water Science and Technology 2017, 75, 1529 -1538.

AMA Style

Lucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers. Water Science and Technology. 2017; 75 (7):1529-1538.

Chicago/Turabian Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2017. "Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers." Water Science and Technology 75, no. 7: 1529-1538.

Review
Published: 01 November 2016 in Biomass and Bioenergy
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ACS Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. Ensiling for biogas production: Critical parameters. A review. Biomass and Bioenergy 2016, 94, 94 -104.

AMA Style

Ruben Teixeira Franco, Pierre Buffière, Rémy Bayard. Ensiling for biogas production: Critical parameters. A review. Biomass and Bioenergy. 2016; 94 ():94-104.

Chicago/Turabian Style

Ruben Teixeira Franco; Pierre Buffière; Rémy Bayard. 2016. "Ensiling for biogas production: Critical parameters. A review." Biomass and Bioenergy 94, no. : 94-104.

Journal article
Published: 01 June 2016 in BioEnergy Research
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The potential of methane production by anaerobic digestion of lignocellulosic biomass depends not only on the availability of the resources in the considered territory, but also on their physico-chemical characteristics. Relevant methods of characterization are, therefore, needed to select and possibly combine the most appropriate biomass substrates in order to optimize energy recovery through anaerobic digestion processes. The objective of the present study was to determine whether biomethane potential of such substrates could be predicted from a limited number of variables more rapidly or determined more easily. A set of 36 biomass substrates and organic residues from a variety of origins was analyzed for total and easily hydrosoluble organic matter fractions (volatile solid, VS and soluble chemical oxygen demand, SCOD), neutral detergent soluble fraction (SOL), hemicelluloses (HEM), cellulose (CELL), and lignin-like residual fractions (RES). Bioreactivity of all samples was also measured by experimental assays (biochemical oxygen demand, BOD and biochemical methane potential, BMP). The whole set of data thereby obtained was analyzed statistically considering one dependent variable (BMP), and six independent variables (SCOD, SOL, HEM, CELL, RES, and BOD). Partial least square (PLS) analysis revealed very clearly a positive correlation between BMP and BOD, which were both anti-correlated with RES. On the other hand, no correlations were observed between BMP, SCOD, HEM, and CELL contents. PLS analysis showed that BMP was significantly correlated to the six independent variables. The most influential variables were found to be RES and BOD, and a polynomial model was successfully validated for the prediction of BMP from RES and BOD.

ACS Style

Rémy Bayard; Xun Liu; Hassen Benbelkacem; Pierre Buffière; Rémy Gourdon. Can Biomethane Potential (BMP) Be Predicted from Other Variables Such As Biochemical Composition in Lignocellulosic Biomass and Related Organic Residues? BioEnergy Research 2016, 9, 610 -623.

AMA Style

Rémy Bayard, Xun Liu, Hassen Benbelkacem, Pierre Buffière, Rémy Gourdon. Can Biomethane Potential (BMP) Be Predicted from Other Variables Such As Biochemical Composition in Lignocellulosic Biomass and Related Organic Residues? BioEnergy Research. 2016; 9 (2):610-623.

Chicago/Turabian Style

Rémy Bayard; Xun Liu; Hassen Benbelkacem; Pierre Buffière; Rémy Gourdon. 2016. "Can Biomethane Potential (BMP) Be Predicted from Other Variables Such As Biochemical Composition in Lignocellulosic Biomass and Related Organic Residues?" BioEnergy Research 9, no. 2: 610-623.

Review
Published: 10 December 2015 in Water Science and Technology
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The problems related to hydrogen sulfide in terms of deterioration of sewer networks, toxicity and odor nuisance have become very clear to the network stakeholders and the public. The hydraulic and (bio)chemical phenomena and parameters controlling sulfide formation, emission and their incidences in sewer networks are very complex. Recent research studies have been developed in gravity and pressure sewers and some transfer models have been published. Nevertheless, the models do not take into account all the physical phenomena influencing the emission process. After summing up the main scientific knowledge concerning the production, oxidation, transfer and emission processes, the present review includes: (i) a synthetic analysis of sulfide and hydrogen sulfide emission models in sewer networks, (ii) an estimation of their limit, (iii) perspectives to improve the modelling approach. It shows that sulfide formation and uptake models still need refinements especially for some phenomena such as liquid to gas mass transfer. Transfer models that have been published so far are purposely simplified and valid for simple systems. More efforts have to be undertaken in order to better understand the mechanisms and the dynamics of hydrogen sulfide production and emission in real conditions.

ACS Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. A review of sulfide emissions in sewer networks: overall approach and systemic modelling. Water Science and Technology 2015, 73, 1231 -1242.

AMA Style

Lucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. A review of sulfide emissions in sewer networks: overall approach and systemic modelling. Water Science and Technology. 2015; 73 (6):1231-1242.

Chicago/Turabian Style

Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2015. "A review of sulfide emissions in sewer networks: overall approach and systemic modelling." Water Science and Technology 73, no. 6: 1231-1242.

Journal article
Published: 01 October 2015 in Biomass and Bioenergy
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ACS Style

X. Liu; R. Bayard; H. Benbelkacem; Pierre Buffiere; Rémy Gourdon. Evaluation of the correlations between biodegradability of lignocellulosic feedstocks in anaerobic digestion process and their biochemical characteristics. Biomass and Bioenergy 2015, 81, 534 -543.

AMA Style

X. Liu, R. Bayard, H. Benbelkacem, Pierre Buffiere, Rémy Gourdon. Evaluation of the correlations between biodegradability of lignocellulosic feedstocks in anaerobic digestion process and their biochemical characteristics. Biomass and Bioenergy. 2015; 81 ():534-543.

Chicago/Turabian Style

X. Liu; R. Bayard; H. Benbelkacem; Pierre Buffiere; Rémy Gourdon. 2015. "Evaluation of the correlations between biodegradability of lignocellulosic feedstocks in anaerobic digestion process and their biochemical characteristics." Biomass and Bioenergy 81, no. : 534-543.

Journal article
Published: 01 January 2015 in Déchets, sciences et techniques
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ACS Style

Julien Bollon; Hassen Benbelkacem; Rémy Bayard; Rémy Gourdon; Pierre Buffière. Essais et modélisation de l’inhibition de la dégradation du propionate par les acides gras volatils en digestion anaérobie par voie sèche. Déchets, sciences et techniques 2015, 1 .

AMA Style

Julien Bollon, Hassen Benbelkacem, Rémy Bayard, Rémy Gourdon, Pierre Buffière. Essais et modélisation de l’inhibition de la dégradation du propionate par les acides gras volatils en digestion anaérobie par voie sèche. Déchets, sciences et techniques. 2015; (69):1.

Chicago/Turabian Style

Julien Bollon; Hassen Benbelkacem; Rémy Bayard; Rémy Gourdon; Pierre Buffière. 2015. "Essais et modélisation de l’inhibition de la dégradation du propionate par les acides gras volatils en digestion anaérobie par voie sèche." Déchets, sciences et techniques , no. 69: 1.