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12 results on '"production de méthane"'

1. Comparison of pre- and inter-stage aerobic treatment of wastewater sludge: Effects on biogas production and COD removal

Author

Julie Jimenez, Søren Eriksen, Sasha D. Hafner, Hélène Carrère, Charlotte Rennuit, Jin Mi Triolo, Rennuit, Charlotte, University of Southern Denmark (SDU), Vand Center Syd, Partenaires INRAE, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Subjects
[SDV]Life Sciences [q-bio], 02 engineering and technology, Wastewater, 010501 environmental sciences, Waste Disposal, Fluid, 01 natural sciences, Bioreactors, 0202 electrical engineering, electronic engineering, information engineering, Anaerobiosis, Organic matter loss, Waste Management and Disposal, Biogas production, chemistry.chemical_classification, Sewage, methane, boue, General Medicine, Accessibility, Pulp and paper industry, 6. Clean water, accessibility, production de méthane, [SDE]Environmental Sciences, prétraitement, Methane, Anaerobic exercise, organic matter loss, Environmental Engineering, 020209 energy, Bioengineering, Fractionation, Methane yield, Waste Water, Aerobic digestion, Organic matter, recalcitrance, complexity, 0105 earth and related environmental sciences, digestion aérobie thermophile, Renewable Energy, Sustainability and the Environment, Environmental engineering, Substrate (chemistry), Complexity, Anaerobic digestion, chemistry, matière organique, Biofuels, Recalcitrance
Abstract

The aim of this study was to investigate thermophilic (55 °C) aerobic digestion (TAD) as pre- and inter-stage treatment of sludge anaerobic digestion and to analyse the change in organic matter accessibility and complexity. Pre-treatment decreased methane yield (up to −70%), due to oxidation losses whereas inter-stage treatment slightly improved overall methane yield (+2.6%) and total COD removal (+5%) compared to control. Anaerobic degradability and COD removal in the second anaerobic stage significantly increased, by 13–40%. Organic matter fractionation showed that TAD led to an increase in sludge organic matter accessibility in all cases. Organic matter complexity, measured by fluorimetry, increased after TAD pre-treatment whereas it remained constant after inter-stage treatment. TAD was shown to be more efficient if applied to a more recalcitrant substrate and should thus be used as inter-stage treatment to avoid decreasing methane production.

Published
2018

2. Combining a process-based model of rumen fermentation with methane production data from respiration chambers

Author

Kettle, Helen, Munoz Tamayo, Rafael, Dewhurst, R.J., Biomathematics and Statistics Scotland, Modélisation Systémique Appliquée aux Ruminants (MoSAR), AgroParisTech-Institut National de la Recherche Agronomique (INRA), Scotland's Rural College (SRUC), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, and Scotland's Rural College (SCUR)

Subjects
modelling, rumen, animal structures, production de méthane, marsh gas, [SDV]Life Sciences [q-bio], food and beverages, fermentation du rumen, microorganisme du rumen, méthane, modélisation
Abstract

By incorporating the dynamical aspects of the respiration chamber data, the model allows further information on an individual animal’s rumen microbiome to be extracted. This represents a potential stepping stone to relating rumen microbial genes to parameters controlling the dynamics of rumen fermentation and hence methane production.

Published
2019

3. Methane emissions in sheep infected with parasitic nematodes and supplemented with Acacia mearnsii

Author

Paulo de Mello Tavares Lima, Pierre Crouzoulon, Geneviève Zabré, Adama Kaboré, Vincent Niderkorn, Herve Hoste, Adibe Luiz Abdalla, Helder Louvandin, Centro de Energia Nuclear na Agricultura, University of São Paulo (USP), Institut de l'Environnement et Recherches Agricoles [Ouagadougou] (INERA), Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Interactions hôtes-agents pathogènes [Toulouse] (IHAP), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, and Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement

Subjects
tanin, mouton, Black wattle, [SDV]Life Sciences [q-bio], agneau, Trichostrongylus colubriformis, Haemonchus contortus, Small chamber, Tannins, [SHS]Humanities and Social Sciences, production de méthane, [INFO]Computer Science [cs], acacia mearnsii
Abstract

Our objective was to evaluate the effects of Acacia mearnsii bark extract (PAB) on methane (CH4) production in sheep infected with Trichostrongylus colubriformis and Haemonchus contortus. Twenty 10 month-old Santa Inês lambs were used in a 50-day trial. Four treatment groups were formed: two control groups uninfected, one without PAB (C-) (n=4) and one with PAB (C+) (n=4); and two infected groups, one without PAB (I-) (n=6) and another receiving PAB (I+) (n= 6). Animals were kept in individual pens for 40 days, and received ad libitum chopped tifton 85 hay (Cynodon spp.) and 210 g/animal/day of concentrate (PAB supplementation: 15 g/animal/day – in concentrate). Animals were reared indoors to avoid helminthic infections (faecal egg count (FEC) was monthly controlled). At day 0, infected groups were artificially infected with L3 larvae of T. colubriformis (7500)and H. contortus (5000). After 28 days post- infection, establishment of infections was confirmed by FEC: I-: 1150 + 530.1 and I+: 567 + 544.6 eggs/gram of feces. After 40 days of trial (during which other parameters were evaluated - data not shown), CH4 emissions in chambers were measured and variance analysis (proc GLM, SAS®) showed no PAB effects on methanogenesis (p > 0.05), however, both infected groups had higher CH4 emissions than the control groups: C-: 16.7 + 10.91; C+:23.7 + 12.88; I-: 43.1 + 6.37; I+: 40.6 + 6.02 (g CH4/kg dry matter intake) (p < 0.05). The methanogenic effect of parasitc infections should be explored in studies addressing sustainability of animal production.

Published
2019

4. Correlating methane production to microbiota in anaerobic digesters fed synthetic wastewater

Author

Daniel Zitomer, Michael T. Johnson, Kaushik Venkiteshwaran, Kim Milferstedt, Jérôme Hamelin, Masanori Fujimoto, Department of Civil, Construction and Environmental Engineering, Marquette University, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign [Urbana], University of Illinois System-University of Illinois System, Marquette University [Milwaukee], Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA)

Subjects
0301 basic medicine, anaerobic digestion, multiple linear regression, digesteur anaérobie, Environmental Engineering, [SDV]Life Sciences [q-bio], 030106 microbiology, Biomass, digestion anaérobie, microbial community composition, quantitative structure activity relationship, Wastewater, 010501 environmental sciences, Biology, 01 natural sciences, 03 medical and health sciences, Bioreactors, microbiote, RNA, Ribosomal, 16S, bioindicator, Anaerobiosis, Waste Management and Disposal, Relative species abundance, 0105 earth and related environmental sciences, Water Science and Technology, Civil and Structural Engineering, bioindicateur, communauté microbienne, amplicon sequencing, Microbiota, Ecological Modeling, régression linéaire multiple, Environmental engineering, structure activity relationships, Pulp and paper industry, Pollution, 6. Clean water, relation structure activité, Anaerobic digestion, Microbial population biology, production de méthane, Volatile suspended solids, Species evenness, microbial community, Methane, Anaerobic exercise
Abstract

A quantitative structure activity relationship (QSAR) between relative abundance values and digester methane production rate was developed. For this, 50 triplicate anaerobic digester sets (150 total digesters) were each seeded with different methanogenic biomass samples obtained from full-scale, engineered methanogenic systems. Although all digesters were operated identically for at least 5 solids retention times (SRTs), their quasi steady-state function varied significantly, with average daily methane production rates ranging from 0.09 ± 0.004 to 1 ± 0.05 L-CH4/LR-day (LR = Liter of reactor volume) (average ± standard deviation). Digester microbial community structure was analyzed using more than 4.1 million partial 16S rRNA gene sequences of Archaea and Bacteria. At the genus level, 1300 operational taxonomic units (OTUs) were observed across all digesters, whereas each digester contained 158 ± 27 OTUs. Digester function did not correlate with typical biomass descriptors such as volatile suspended solids (VSS) concentration, microbial richness, diversity or evenness indices. However, methane production rate did correlate notably with relative abundances of one Archaeal and nine Bacterial OTUs. These relative abundances were used as descriptors to develop a multiple linear regression (MLR) QSAR equation to predict methane production rates solely based on microbial community data. The model explained over 66% of the variance in the experimental data set based on 149 anaerobic digesters with a standard error of 0.12 L-CH4/LR-day. This study provides a framework to relate engineered process function and microbial community composition which can be further expanded to include different feed stocks and digester operating conditions in order to develop a more robust QSAR model.

Published
2017

5. Biochemical composition and methane production correlations

Author

CHARNIER, Cyrille, Latrille, Eric, Moscoviz, Roman, Miroux, Jérémie, Steyer, Jean-Philippe, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), BioEnTech, and International Water Association (IWA). INT.

Subjects
solid waste characterization, bioénergie, composition biochimique, valorisation de la matière organique, biochemical methane potential, principal component analysis, [SDV]Life Sciences [q-bio], déchet solide, digestion anaérobie, biochemical composition, kinetic of methane production, chemical oxygen demand, potentiel méthane, demande chimique en oxygène, production de méthane, [SDE]Environmental Sciences
Abstract

International audience; Substrates for anaerobic digestion are composed of heterogeneous and complex organic matter. General parameters of the organic matter can be used to describe its composition such as sugar, protein and lipid contents, Chemical Oxygen Demand (COD), Biochemical Methane Potential (BMP) and kinetic of methane production. These parameters are required for the monitoring of digesters but their characterization are time consuming and expensive; thus, these parameters are rarely assessed all together. We investigated the existing correlations between COD, methane yield, biodegradability, kinetic of methane production and sugar, protein and lipid contents on 222 samples using principal component analysis and Pearson’s correlation coefficient. Our work aims at providing a support to operators when only a partial characterization of the substrates is available. Positive correlation between methane yield and methane production kinetic but also unexpected independence of COD and BMP are shown. Sugars, proteins and lipids modulated differently the anaerobic digestion performances. Sugars are correlated with readily biodegradable organic matter while proteins are slightly anti-correlated with biodegradability. Lipids were correlated with high methane yield but slow methane productions. Finally, partial least square regression points towards more descriptive organic matter characterization that could be used to predict the kinetic of methane production.

Published
2016

6. Anaerobic digester bioaugmentation influences quasi steady state performance and microbial community

Author

Kaushik Venkiteshwaran, Jérôme Hamelin, Daniel Zitomer, Kim Milferstedt, Department of Civil, Construction and Environmental Engineering, Marquette University, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Marquette University [Milwaukee], Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), and Venkiteshwaran, Kaushik

Subjects
0301 basic medicine, Methanobacterium, Bioaugmentation, digesteur anaérobie, Environmental Engineering, digester efficiency, methanobacterium, methanosaeta, methanosarcina, methanospririllum, next generation sequencing, [SDV]Life Sciences [q-bio], 030106 microbiology, processus stationnaire, Biomass, digestion anaérobie, 010501 environmental sciences, Membrane bioreactor, 01 natural sciences, Methanosaeta, yield increases, 03 medical and health sciences, Bioreactors, RNA, Ribosomal, 16S, augmentation de rendement, Food science, Anaerobiosis, bioaugmentation, Waste Management and Disposal, Effluent, 0105 earth and related environmental sciences, Water Science and Technology, Civil and Structural Engineering, 2. Zero hunger, communauté microbienne, biology, Ecological Modeling, Environmental engineering, Methanosarcina, biology.organism_classification, biogaz, Pollution, Archaea, production de méthane, steady-state processes, microbial community, Anaerobic exercise, Methane
Abstract

Nine anaerobic digesters, each seeded with biomass from a different source, were operated identically and their quasi steady state function was compared. Subsequently, digesters were bioaugmented with a methanogenic culture previously shown to increase specific methanogenic activity. Before bioaugmentation, different seed biomass resulted in different quasi steady state function, with digesters clustering into three groups distinguished by methane (CH4) production. Digesters with similar functional performance contained similar archaeal communities based on clustering of Illumina sequence data of the V4V5 region of the 16S rRNA gene. High CH4 production correlated with neutral pH and high Methanosarcina abundance, whereas low CH4 production correlated to low pH as well as high Methanobacterium and DHVEG 6 family abundance. After bioaugmentation, CH4 production from the high CH4-producing digesters transiently increased by 11 ± 3% relative to non-bioaugmented controls (p

Published
2016

7. Similar PAH fate in anaerobic digesters inoculated with three microbial communities accumulating either volatile fatty acids or methane

Author

Dominique Patureau, Jérôme Hamelin, Florence Braun, Anaïs Bonnafous, Jean-Philippe Steyer, Nadine Delgenès, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), ADEME, Programme National de Recherche sur les Perturbateurs Endocriniens (PNRPE), INRA, Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), and Patureau, Dominique

Subjects
digesteur anaérobie, [SDV]Life Sciences [q-bio], hydrocarbure aromatique polycyclique, digestion anaérobie, lcsh:Medicine, acide gras volatil, Biology, boue urbaine, Bioreactors, Biogas, Anaerobiosis, Polycyclic Aromatic Hydrocarbons, lcsh:Science, eaux usées, communauté microbienne, Multidisciplinary, Bacteria, Sewage, Ecology, lcsh:R, Fatty Acids, Volatile, Archaea, Soil contamination, traitement des effluents, 6. Clean water, Anaerobic digestion, Activated sludge, Wastewater, Microbial population biology, production de méthane, 13. Climate action, Environmental chemistry, Environmental Pollutants, lcsh:Q, Sewage treatment, Anaerobic bacteria, Methane, Research Article
Abstract

Urban sludge produced on wastewater treatment plants are often contaminated by organic pollutants such as polycyclic aromatic hydrocarbons (PAH). Their removal under methanogenic conditions was already reported, but the factors influencing this removal remain unclear. Here, we determined the influence of microbial communities on PAH removal under controlled physico-chemical conditions. Twelve mesophilic anaerobic digesters were inoculated with three microbial communities extracted from ecosystems with contrasting pollution histories: a PAH contaminated soil, a PCB contaminated sediment and a low contaminated anaerobic sludge. These anaerobic digesters were operated during 100 days in continuous mode. A sterilised activated sludge, spiked with 13 PAH at concentrations usually encountered in full-scale wastewater treatment plants, was used as substrate. The dry matter and volatile solid degradation, the biogas production rate and composition, the volatile fatty acids (VFA) production and the PAH removals were monitored. Bacterial and archaeal communities were compared in abundance (qPCR), in community structure (SSCP fingerprinting) and in dominant microbial species (454-pyrosequencing). The bioreactors inoculated with the community extracted from low contaminated anaerobic sludge showed the greater methane production. The PAH removals ranged from 10 % to 30 %, respectively, for high and low molecular weight PAH, whatever the inoculums tested, and were highly correlated with the dry matter and volatile solid removals. The microbial community structure and diversity differed with the inoculum source; this difference was maintained after the 100 days of digestion. However, the PAH removal was not correlated to these diverse structures and diversities. We hence obtained three functional stable consortia with two contrasted metabolic activities, and three different pictures of microbial diversity, but similar PAH and matter removals. These results confirm that PAH removal depends on the molecule type and on the solid matter removal. But, as PAH elimination is similar whether the solid substrate is degraded into VFA or into methane, it seems that the fermentative communities are responsible for their elimination.

Published
2015

8. Effect of tropical plants containing condensed tannins on fermentation, digestibility and methane production in sheep

Author

Rira, Moufida, Morgavi, Diego, Archimède, Harry, Marie-Magdeleine, Carine, Genestoux, Lucette, Bousseboua, Hacène, Doreau, Michel, Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Unité de Recherches Zootechniques (URZ), Institut National de la Recherche Agronomique (INRA), Université des Frères Mentouri (Constantine 1), UE, European Project: 266018,EC:FP7:KBBE,FP7-KBBE-2010-4,ANIMALCHANGE(2011), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Université frères Mentouri Constantine I (UMC), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, plante tropicale, tanin, mouton, digestibilité, production de méthane, [SDV]Life Sciences [q-bio], fermentation, préférence alimentaire, Sciences agricoles, ComputingMilieux_MISCELLANEOUS, Agricultural sciences
Abstract

International audience

Published
2014

9. Effect on methane production of the addition of fatty by-products from the refining of vegetable oil in co-digestion

Author

Torrijos, Michel, Sousbie, Philippe, Badey, L., Steyer, Jean-Philippe, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), Centre Technique Industriel des Entreprises du Secteur des Corps Gras, International Water Association (IWA). INT., and Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)

Subjects
anaerobic digestion, co-digestion, solid waste, fed-batch, fatty residues, oil refining, [SDV]Life Sciences [q-bio], déchet solide, digestion anaérobie, codigestion, production de méthane, déchet graisseux, huile végétale
Abstract

The purpose of this work was to investigate the effects of the addition of by-products from the refining of vegetable oil on the behavior of co-digestion reactors treating a mixture of grass, cow dung and fruit and vegetable wastes. Three by-products were used: one soapstocks, one used winterisation earth and one skimming of aeroflotation of the effluents. Three 15-L reactors were run in parallel and fed 5 times a week. In a first phase of 4 weeks, the three reactors were fed with the co-digestion substrates alone (grass, cow dung and fruit and vegetable wastes) at an OLR of 1.5 g VS/kg.d. Then, one of the three by-products from the refining of oil was added to the feed of each reactor generating a 33% increase in the OLR (2 gVS/kg.d). The results show that the addition of by-products from the refining of oil is an efficient way to increase the methane production of co-digestion reactors thanks to their high methane yield (0.77 – 0.80 l CH4/gVS). Indeed, in this work, it was possible to increase by 60 to 65 % the methane production of the reactors by a 33% increase in the OLR thanks to the addition of the by-products.

Published
2011

10. Impact of various thermo chemical pretreatments on solubilisation and methane production of sunflower stalks

Author

Monlau, Florian, Barakat, Abdellatif, Latrille, Eric, Steyer, Jean-Philippe, Carrère, Hélène, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), International Water Association (IWA). INT., Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Subjects
anaerobic digestion, composition biochimique, [SDV]Life Sciences [q-bio], digestion anaérobie, sunflower residues, prétraitement thermochimique, biomasse lignocellulosique, potentiel méthane, tournesol, biochemical composition, acid, alkali and oxidative pretreatments, production de méthane, acid, alkali and oxidative pretreatments
Abstract

The conversion of sunflower stalks into biomethane by batch mesophilic anaerobic digestion was investigated in this work. Methane potential of sunflower stalks (192 ± 2 mLCH4/g VS) was increased by several thermo-chemical pretreatments: NaOH, H2O2, Ca(OH)2, HCl and FeCl3. The highest production (259 ± 6mLCH4/ g VS) corresponding to a 31.4% increase was reached for the treatment at 55°C with 4% NaOH during 24h. More than 90 % of hemicelluloses were removed by applying acidic pretreatment (10% FeCl3 or 4% HCl) at 170 °C. Oxidative and alkaline pretreatment (4% NaOH, 4% H2O2, 4% Ca(OH)2) at 55°C were found to be more efficient to dissolve lignin than acidic pretreatment with a lignin removal around 22%.A negative linear correlation (R2 = 0.895) was found between the lignin content of raw and pretreated sunflower stalks and the methane potential.

Published
2011

11. Effet de l’ajout de sources de fibres dans l’aliment sur la volatilisation de l’ammoniac et la production de méthane des effluents porcins

Author

Jarret, Guillaume, Martinez, José, Dourmad, Jean-Yves, Unité de Recherche Gestion environnementale et traitement biologique des déchets, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Systèmes d'élevage, nutrition animale et humaine (SENAH), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Subjects
[SDV]Life Sciences [q-bio], PRODUCTION DE METHANE, [INFO]Computer Science [cs], ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2010

12. Multiplatform milk metabolomics highlights potential biomarkers related to methane emissions in dairy cows

Author

Bénédict Yanibada, Diego Morgavi, Cécile Canlet, Mélanie Petera, Maguy Eugène, Cécile Martin, Hamid Boudra, Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Analyse de Xénobiotiques, Identification, Métabolisme (E20 Metatoul-AXIOM), ToxAlim (ToxAlim), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-MetaToul-MetaboHUB, Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité de Nutrition Humaine (UNH), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), bourse Cifre, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National de la Santé et de la Recherche Médicale (INSERM), Unité Mixte de Recherches sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique (INRA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA), Unité de Nutrition Humaine - Clermont Auvergne (UNH), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne (UCA), Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Subjects
approche métabolomique, milk, race bovine holstein, [SDV]Life Sciences [q-bio], mass spectrum analysis, methanogenesis, méthanogénèse, lait, chromatographie en phase liquide, production de méthane, spectrométrie de masse, vache laitière, greenhouse gases, biomarker, dairy cows, gaz à effet de serre, biomarqueur
Abstract

Session 6: Feed conversion efficiency towards productivity and reduction of excreta; Multiplatform milk metabolomics highlights potential biomarkers related to methane emissions in dairy cows. 10. International Symposium on the Nutrition of Herbivores (ISNH10)

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