Pierre Buffière

Pierre Buffière
Institut National des Sciences Appliquées de Lyon | INSA Lyon · Research Center on Wastes, Waters, Environment and Pollutions (DEEP- EA 7429)

Professor

About

107
Publications
28,570
Reads
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3,282
Citations
Introduction
Pierre Buffière currently works at the Research Center on Wastes, Waters, Environment and Pollutions (DEEP- EA 7429), INSA - Université" de Lyon. Pierre does research in Chemical Engineering.
Additional affiliations
January 2016 - present
INSA - Université de Lyon
Position
  • Professor (Full)
Description
  • Chemical Engineering applied to environmental bioprocesses
September 2007 - December 2015
Institut National des Sciences Appliquées de Lyon
Position
  • Professor (Full)
September 2007 - September 2017
Institut National des Sciences Appliquées de Lyon
Position
  • Professor (Full)

Publications

Publications (107)
Article
Three successive mechanical pretreatments were applied at lab-scale in order to mimic the main functions of industrial mechanical pretreatments used for feedstock preparation in anaerobic digestion: particle size reduction (shredding), homogenization (mixing) and fiber alteration (blending). In parallel, full-scale mechanical devices have been inve...
Article
Pre-treatments are usually necessary to prepare biowaste to anaerobic digestion. The major objectives are (i) to remove undesirable materials such as plastics and metals, which may contaminate the biowaste even if separated source-collection systems are implemented, and (ii) to extract the most readily biodegradable organic fractions from the waste...
Article
The formation of hydrogen sulfide (H2S) during anaerobic digestion (AD) imposes constraints on the valorisation of biogas. So far, inorganic sulfur compounds -mainly sulfate - have been considered as the main contributors to H2S formation, while the contribution of organic sulfur compounds is mostly neglected. This study investigates the fate of or...
Article
Even though sulfur compounds and their transformations may strongly affect wastewater treatment processes, their importance in water resource recovery facilities (WRRF) operation remains quite unexplored, notably when it comes to full-scale and plant-wide characterization. This contribution presents a first-of-a-kind, plant-wide quantification of t...
Article
Full-text available
18 19 Biowaste material is a good candidate for the production of energy in urban territories. The presence of 20 undesirable or constituents mixed with the biowaste collected by municipalities makes it difficult to recycle 21 organic matter of sufficient quality for agricultural uses. Methane production is particularly attractive for energy 22 rec...
Article
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 inhibi...
Article
Global sensitivity analysis enables to identify model parameters that have the most significant impact on model outputs and therefore require an estimation effort. This work demonstrates the reliability of a global sensitivity analysis methodology based on Definitive Screening Design and multiple linear regression analysis that requires a low numbe...
Article
Full-text available
The present study investigated a wet mechanical pretreatment to improve methane production by anaerobic digestion from biowaste material by separating a biodegradable aqueous slurry fraction (ASF) from a more recalcitrant particulate fraction (PF). Four source-sorted municipal biowastes were studied, namely household (HBW), supermarket (SBW), resta...
Article
Hydrolysis is the most critical stage in high solids Temperature Phased Anaerobic Digestion (TPAD). In this paper two different Organic Fraction of Municipal Solid Waste (OFMSW) types were tested in co-digestion with Digested Sludge (DS) at different temperatures: 37, 55 and 65 °C. Volatile fatty acids (VFAs), soluble chemical oxygen demand (CODs)...
Article
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...
Article
Conductive materials can serve as biocatalysts during direct interspecies electron transfer for methanogenesis in anaerobic reactors. However, the mechanism promoting direct interspecies electron transfer in anaerobic reactors, particularly under environments in which diverse substrates and microorganisms coexist, remains to be elucidated from a sc...
Article
Full-text available
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 s...
Article
Full-text available
Pre-treatments are often applied in anaerobic digestion in order to improve the performance of the process: increased methane yield and rate. Physical pretreatments are the most commonly used for anaerobic digestion of agricultural waste. The main purpose of this work was to evaluate the effects of different lab-scale mechanical pretreatments on ca...
Article
Full-text available
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 seq...
Article
Full-text available
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 pres...
Article
Biowaste material is a good candidate for the production of energy in urban territories. The presence of undesirable or constituents mixed with the biowaste collected by municipalities makes it difficult to recycle organic matter of sufficient quality for agricultural uses. Methane production is particularly attractive for energy recovery notably b...
Article
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...
Article
In this study a fractionation procedure was developed and applied to evaluate the potential of some organic wastes (two cattle manures and two catch crops, fresh and after ensiling) for anaerobic digestion. This procedure was based on water extraction of the raw sample, which enabled the evaluation of the contributions of water-soluble and particul...
Article
Full-text available
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 manu...
Article
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 accuratel...
Article
The impact of formic acid and glucose addition on the co-ensiling of cattle manure with straw was assessed during 4 months at laboratory scale. Feedstock deprived of additives lost 67% of its methane potential for prolonged ensiling. This was mainly due to the lack of water-soluble carbohydrates and to the high methanogenic activity of cattle manur...
Conference Paper
Full-text available
In this study a methodology was developed and applied to evaluate the potential of several organic wastes (cattle manures and catch crops) for anaerobic digestion. These procedure was based on water extraction of the raw sample, which enabled the measurement of the contributions of water-soluble and particulate phases to the studied properties. Bio...
Article
One of the main problems of dry anaerobic digestion plants treating urban solid waste is the loss of useful volume by the sedimentation of solids (inerts) into the bottom of the digester, or by accumulation of floating materials in its upper part. This entails a periodic cost of emptying and cleaning the digesters, a decrease in biogas production a...
Article
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...
Article
Full-text available
The integrated fixed-film activated sludge (IFAS) process is being increasingly used to enhance nitrogen removal for former activated sludge systems. The aim of this work is to evaluate a numerical model of a new nitrifying/denitrifying IFAS configuration. It consists of two carrier-free reactors (anoxic and aerobic) and one IFAS reactor with a fil...
Article
High solid anaerobic digestion of agricultural wastes (manure and grass silage) was tested on temperature phased anaerobic digester (TPAD) at lab-scale. A 4 days hyperthermophilic hydrolysis was followed by a 15 days methanogenesis. The TPAD was divided into 4 or 5 tanks in series without recycling: 2 sectors for hydrolysis (2 days HRT each) and 2...
Article
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 an...
Conference Paper
Full-text available
This work presents a set of long-term storage assays at laboratory scale for two different types of catch crops and cattle manures. Comparison between the impact of ensiling and open-air storage techniques on organic matter and energy preservation was performed. Effects of co-ensiling with cattle manure and several additives on silage quality were...
Article
Ensiling and open-air storage of up to 98 days were assessed for a catch crop in order to identify the best management practices before its use as feedstock for anaerobic digestion. For ensiling, this included the study of the effect of wilting limited by unsuitable weather conditions. Results showed that after 98 days, methane potential of biomass...
Article
Biological treatments of Residual Municipal Solid Waste (RMSW) allow to divert biodegradable materials from landfilling and recover valuable alternative resources. The biodegradability of the waste components needs however to be assessed in order to design the bioprocesses properly. The present study investigated complementary approaches to aerobic...
Article
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....
Article
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...
Article
In order to meet the legislative demands of new energy policy, investment in anaerobic digestion and biogas production has increased in recent years, making it a versatile and fully established technology. So as to remain competitive, anaerobic digestion should be optimized not only at the level of the process, but also down and upstream, in which...
Article
Full-text available
Production of biogas from different organic materials is a most interesting source of renewable energy. The biomethane potential (BMP) of these materials has to be determined to get insight in design parameters for anaerobic digesters. A workshop was held in June 2015 in Leysin Switzerland to agree on common solutions to the conundrum of inconsiste...
Article
Full-text available
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 substrate...
Conference Paper
Full-text available
Storage requirements for anaerobic digestion feedstock are boosting ensiling research for biogas production purposes. However, so far, studies have been mainly focused on good management practices of easily biodegradable biomass. In this article, effect of ensiling, open-air storage and feedstock moisture on methane potential of an agricultural cro...
Article
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...
Article
The influence of the total solid content on the performance of high-solids waste digestion has been investigated on a 50 L reactor. The feedstock was residual municipal solid waste. The reactor has been operated in semi-continuous mode during 3 periods at various total solid content in the inlet (22%, 26% and 30%). Steady-state results showed that...
Article
Solid waste biodegradability is a key parameter to control and optimize high solid anaerobic digestion (HSAD) of biowaste (BW) and residual municipal solid waste (RMSW). It enables to assess the biomethane potential and the biostability achieved by the process. The objective of this study was to correlate the biochemical methane potential (BMP) wit...
Article
Full-text available
Batch experimental assays were performed in order to assess the kinetics of propionate and acetate uptake in dry (high-solids) anaerobic digesters. The profile of propionate uptake was lower at high propionate and acetate amounts. Haldane’s inhibition model for substrate inhibition and a non-competitive product inhibition by acetate were found to r...
Article
Full-text available
The objective of this study is to improve knowledge on the IFAS system designed for nitrogen removal. Biofilm growth and its contribution to nitrification was monitored under various operating conditions in a semi-industrial pilot-scale plant. Nitrification rates were monitored in biofilms developed on free-floating media and in activated sludge op...
Article
Full-text available
The influence of temperature and organic load on the anaerobic digestion of primary sludge was studied in the range of 28-60 ° C with organic loads ranging from 2 to 8.5 gCOD.L-1.j-1. The work was carried out from a mesophilic inoculum with prior adaptation. The incubation was conducted in 10-L perfectly mixed thermo-regulated digesters which were...
Article
Full-text available
In the selection for renewable energy resources, the bioconversion of biomasses rich in lignocellulose in methane is one of the most promising alternatives. However, the selection of the resources depends not only on their availability but also on their organicphysico-chemical characteristics. Their structure, their composition and the presence of...
Article
A model dedicated to dry anaerobic digestion process was previously developed. This model was based on the ADM1 model, and modified to take into account the specificity of dry anaerobic media. The objective of the work presented here was to study the sensitivity to the model of 2 parameters. The first parameter (kLa) was related to mass transfer of...
Article
Full-text available
In the selection for renewable energy resources, the bioconversion of biomasses rich in lignocellulose in methane is one of the most promising alternatives. However, the selection of the resources depends not only on their availability but also on their organic-physico-chemical characteristics. Their structure, their composition and the presenc...
Article
Full-text available
The influence of temperature and organic load on the anaerobic digestion of primary sludge was studied in the range of 28-60 ° C with organic loads ranging from 2 to 8.5 gCOD.L-1.j-1. The work was carried out from a mesophilic inoculum with prior adaptation. The incubation was conduc-ted in 10-L perfectly mixed thermo-regulated di-gesters whic...
Article
The development of a wide number of anaerobic digestion technologies for solid waste treatment gives a better overview of their specificities. In this paper, we present the major types of processes and their principles, together with the main parameters necessary for understanding their design and operation. We also identified outlines for future R...
Article
An experimental procedure (Residence Time Distribution technique) was used to characterize the macro-mixing of both liquid and solid phases of a laboratory-scale dry anaerobic digester using appropriate tracers. The effects of the waste origin and total solid content were studied. An increase in TS content from 22% to 30% TS (w/w) induced a macro-m...
Article
Dry anaerobic digestion of solid wastes is now commonly used at the industrial scale. Dry solid content in waste material is usually higher than 15%. w/w in these processes most industrial technologies in dry modes are not mixed, or sometimes intermittently mixed. In these situations convective transfer is negligible and diffusive transfer predomin...
Article
The objective of this study was to evaluate the influence of moisture content on the specific methanogenic activity (SMA) of a fresh dry mesophilic digestate from a municipal solid waste digester plant. For this purpose, SMA tests were performed under mesophilic conditions in 500 mL glass bottles of volume used as batch reactors, during a period of...
Article
The objective of this work is to develop a kinetic model to specifically assess the degradation of the organic fraction of municipal solid waste (OFMSW) in dry anaerobic digestion processes. The model description was designed to include several aspects of dry digestion such as the presence of particulate matter and high solid content.The global str...
Article
The anaerobic digestion of solid waste is usually performed using dry or semi-dry technology. Incoming waste and fermenting digestate are pasty media and thus, at the industrial scale, their suitability for pumping and mixing is a prerequisite at the industrial scale. However, their rheology has been poorly characterised in the literature because t...
Article
The objective of this study was to evaluate the influence of substrate concentration and moisture content on the specific methanogenic activity (SMA) of a fresh dry mesophilic digestate from a municipal solid waste digester plant. For this purpose, SMA tests were performed under mesophilic conditions into glass bottles of 500 mL volume used as batc...
Article
This article presents a number of techniques and recommendations for adequate waste and organic matter characterisation in view of implementing a methanizalion project. We shall look, in particular, at the measures necessary to estimate the fate of matter in a digestion reactor. This methodology shall be illustrated through examples (Residual house...
Article
A laboratory-scale (40 l) reactor was designed to investigate dry anaerobic digestion. The reactor is equipped with an intermittent paddle mixer, enabling complete mixing in the reactor. Three consecutive batch dry digestion tests of municipal solid waste were performed under mesophilic conditions and compared to operation results obtained on a pil...
Book
Anaerobic digestion for the treatment of solid wastes is mostly performed by dry digestion technologies (Total Solid > 20%). Because of the low water content, incoming and fermenting wastes are pasty matrixes, and pumping of fresh waste as well as a good mixing efficiency are a challenge at the industrial scale. Despite the economical importance of...
Article
The aim of this work is to investigate a co-current air-liquid downward flow bubble column with air entrainment by liquid injection nozzle in order to use it as an aerator in activated sludge treatment plants. The study concerns the determination of mass transfer efficiency by measuring the mass transfer coefficient, kLa, both in clean water and in...
Article
Full-text available
In waste materials, proximate analysis measuring the total concentration of carbohydrate, protein, and lipid contents from solid wastes is challenging, as a result of the heterogeneous and solid nature of wastes. This paper presents a new procedure that was developed to estimate such complex chemical composition of the waste using conventional prac...
Patent
L'invention concerne un procédé de traitement en continu de produits organiques solides dans un réacteur d'hydrolyse (10). Le procédé selon l'invention propose de modifier le temps de séjour liquide (TSL) dans le réacteur d'hydrolyse, indépendamment temps de séjour des produits organiques solides (TSS) qui est lui-même modulable de manière à optimi...
Article
Biohydrogen produced by fermentation depends of the operating conditions. The objective of this experimental work was to establish a reaction pathway based on measured values of compound concentrations and to estimate the relative effect of environmental conditions like pH, stirring velocity and hydraulic retention time (HRT). The experiments were...
Article
Despite many mathematical models available in the literature for simulation and optimization of anaerobic digestion processes, only few can accurately account for hydrogen production. In the present study, experiments were performed in a continuous stirred tank reactor with a hydraulic retention time close to 6 h. pH was regulated to 5.5 and agitat...