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1. Predicting the Stability of Organic Matter Originating from Different Waste Treatment Procedures

Author

Yan Wang, Lekun Tan, Patricia Garnier, Sabine Houot, Julie Jimenez, Dominique Patureau, and Yang Zeng

Subjects
anaerobic digestion, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, composting, stability, soil, organic matter, soil application
Abstract

Recycling organic wastes into farmland faces a double challenge: increasing the carbon storage of soil while mitigating CO2 emission from soil. Predicting the stability of organic matter (OM) in wastes and treatment products can be helpful in dealing with this contradiction. This work proposed a modeling approach integrating an OM characterization protocol into partial least squares (PLS) regression. A total of 31 organic wastes, and their products issued from anaerobic digestion, composting, and digestion-composting treatment were characterized using sequential extraction and three-dimension (3D) fluorescence spectroscopy. The apportionment of carbon in different fractions and fluorescence spectra revealed that the OM became less accessible and biodegradable after treatments, especially the composting. This was proven by the decrease in CO2 emission from soil incubation. The PLS model successfully predicted the stability of solid digestate, compost, and compost of solid digestate in the soil by using only the characterized variables of non-treated wastes. The results suggested that it would be possible to predict the stability of OM from organic wastes after different treatment procedures. It is helpful to choose the most suitable and economic treatment procedure to stabilize labile organic carbon in wastes and hence minimize CO2 emission after the application of treatment products to the soil.

Published
2023
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2. Modelling hydrolysis: Simultaneous versus sequential biodegradation of the hydrolysable fractions

Author

Julie Jimenez, Damien J. Batstone, Ángel Robles, Aurora Seco, Fabrice Béline, Cyrille Charnier, Peter A. Vanrolleghem, Mathieu Spérandio, Eberhard Morgenroth, Eric Latrille, Jérôme Harmand, Dominique Patureau, George Ekama, Mokhles Kouas, Jean-Philippe Steyer, Michel Torrijos, 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 Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), BioEnTech, Symbiose : Ecosystèmes microbiens et bioprocédés d’épuration et de valorisation (TBI-SYMBIOSE), Toulouse Biotechnology Institute (TBI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Optimisation des procédés en Agriculture, Agroalimentaire et Environnement (UR OPAALE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Cape Town, Université Laval [Québec] (ULaval), Universitat Politècnica de València (UPV), Universitat de València (UV), University of Queensland [Brisbane], Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - 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 des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut National de la Recherche Agronomique (INRA), EAWAG SWISS FEDERAL INSTITUTE OF AQUATIC SCIENCE AND TECHNOLOGY DUBENDORF SWE, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), ETH ZURICH INSTITUTE OF ENVIRONMENTAL ENGINEERING ZURICH SWE, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), UNIVERSITY OF CAPE TOWN ZAF, DEPARTAMENT D'ENGINYERIA QUIMICA UNIVERSITAT DE VALENCIA BURJASSOT VALENCIA ESP, and ADVANCED WATER MANAGEMENT CENTRE THE UNIVERSITY OF QUEENSLAND AUS

Subjects
[SDV.BIO]Life Sciences [q-bio]/Biotechnology, Biosolids, SEQUENTIAL EXTRACTION, ANAEROBIC DIGESTION, BIODEGRADATION, 02 engineering and technology, 010501 environmental sciences, TRITICUM AESTIVUM, 01 natural sciences, 7. Clean energy, NUMERICAL MODEL, SLUDGE DIGESTION, Bioreactors, METHANE, BIOLOGICAL MATERIALS, ACTIVATED SLUDGE, 0202 electrical engineering, electronic engineering, information engineering, Anaerobiosis, Sequential model, PRIORITY JOURNAL, Waste Management and Disposal, ComputingMilieux_MISCELLANEOUS, CALIBRATION, Sewage, CONCENTRATION (PARAMETER), Chemistry, FRACTIONATION, ACID HYDROLYSIS, INCUBATION TIME, MODELLING, HYDROLYSIS, CHEMICAL FRACTIONATION, SEQUENTIAL DEGRADATION, Biodegradation, Environmental, WASTE TREATMENT, ORGANIC MATTER, [SDE]Environmental Sciences, ANAEROBIC DIGESTION MODEL, ADM1, SOLID WASTE, 020209 energy, MODELS, Fractionation, CAPACITY, Hydrolysis, DIGESTION, ISOTOPIC FRACTIONATION, NONHUMAN, CHEMICAL OXYGEN DEMAND, ARTICLE, MODEL SELECTION, 0105 earth and related environmental sciences, Chromatography, Models, Theoretical, SUBSTRATES, Biodegradation, SIMULTANEOUS DEGRADATION, HOMOGENEOUS MATERIALS, Anaerobic digestion, WASTE WATER MANAGEMENT, Activated sludge, APPLE, Degradation (geology)
Abstract

Hydrolysis is considered the limiting step during solid waste anaerobic digestion (including co-digestion of sludge and biosolids). Mechanisms of hydrolysis are mechanistically not well understood with detrimental impact on model predictive capability. The common approach to multiple substrates is to consider simultaneous degradation of the substrates. This may not have the capacity to separate the different kinetics. Sequential degradation of substrates is theoretically supported by microbial capacity and the composite nature of substrates (bioaccessibility concept). However, this has not been experimentally assessed. Sequential chemical fractionation has been successfully used to define inputs for an anaerobic digestion model. In this paper, sequential extractions of organic substrates were evaluated in order to compare both models. By removing each fraction (from the most accessible to the least accessible fraction) from three different substrates, anaerobic incubation tests showed that for physically structured substrates, such as activated sludge and wheat straw, sequential approach could better describe experimental results, while this was less important for homogeneous materials such as pulped fruit. Following this, anaerobic incubation tests were performed on five substrates. Cumulative methane production was modelled by the simultaneous and sequential approaches. Results showed that the sequential model could fit the experimental data for all the substrates whereas simultaneous model did not work for some substrates. © 2019

Published
2020
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3. Agronomic characterization of anaerobic digestates with near-infrared spectroscopy

Author

Bastien Zennaro, Paul Marchand, Eric Latrille, Jeanne-Chantal Thoisy, Sabine Houot, Cyril Girardin, Jean-Philippe Steyer, Fabrice Béline, Cyrille Charnier, Charlotte Richard, Guillaume Accarion, and Julie Jimenez

Subjects
Environmental Engineering, Spectroscopy, Near-Infrared, Nitrogen, Biofuels, Potassium, Phosphorus, General Medicine, Anaerobiosis, Management, Monitoring, Policy and Law, Waste Management and Disposal, Carbon
Abstract

Anaerobic digestion is an increasingly widespread process for organic waste treatment and renewable energy production due to the methane content of the biogas. This biological process also produces a digestate (i.e., the remaining content of the waste after treatment) with a high fertilizing potential. The digestate composition is highly variable due to the various organic wastes used as feedstock, the different plant configurations, and the post-treatment processes used. In order to optimize digestate spreading on agricultural soils by optimizing the fertilizer dose and, thus, reducing environmental impacts associated to digestate application, the agronomic characterization of digestate is essential. This study investigates the use of near infrared spectroscopy for predicting the most important agronomic parameters from freeze-dried digestates. A data set of 193 digestates was created to calibrate partial least squares regression models predicting organic matter, total organic carbon, organic nitrogen, phosphorus, and potassium contents. The calibration range of the models were between 249.8 and 878.6 gOM.kgDM

Published
2022

4. Ultrasonication affects the bio-accessibility of primary dairy cow manure digestate for secondary post-digestion

Author

Julie Jimenez, Lise Appels, Jean-Philippe Steyer, Samet Azman, Jan Baeyens, Matthijs H. Somers, Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), 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 Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Beijing University of Chemical Technology, Research Foundation – Flanders (FWO) Ph.D. fellowship (1S68017N)., and FWO travel grant (V404019N)

Subjects
Primary (chemistry), Chemistry, 020209 energy, General Chemical Engineering, Sonication, Hydrolysis, Organic Chemistry, Energy Engineering and Power Technology, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Bio accessibility, Dairy cow manure digestate, Fuel Technology, Digestion (alchemy), Digestate, Ultrasound, [SDE]Environmental Sciences, 0202 electrical engineering, electronic engineering, information engineering, Bio-accessibility, Food science, Fractionation, Cow dung, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract

ispartof: FUEL vol:291 status: published

Published
2021
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5. The impact of biogas digestate typology on nutrient recovery for plant growth: Accessibility indicators for first fertilization prediction

Author

Nicolas Bernet, Marco Grigatti, Elisa Boanini, Julie Jimenez, Dominique Patureau, 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 Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), ANR: 10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2011), European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS(2014), Jimenez J., Grigatti M., Boanini E., Patureau D., Bernet N., Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - 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 ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010)

Subjects
[SDV.BIO]Life Sciences [q-bio]/Biotechnology, 020209 energy, Digestates, Digestate, 02 engineering and technology, 010501 environmental sciences, engineering.material, 01 natural sciences, 12. Responsible consumption, Soil, Nutrient, Characterization indicator, Fertilizer, Biogas, 0202 electrical engineering, electronic engineering, information engineering, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Anaerobiosis, Fertilizers, Waste Management and Disposal, 0105 earth and related environmental sciences, 2. Zero hunger, Characterization indicators, Compost, Chemistry, [SDE.IE]Environmental Sciences/Environmental Engineering, Agriculture, Biodegradable waste, Nutrients, 15. Life on land, Anaerobic digestion, Typology, Nutrient recovery, Agronomy, Biofuels, Soil water, engineering
Abstract

International audience; In recent years, anaerobic digestion of organic waste (OW) is rapidly appearing as a winning waste management strategy by producing energy and anaerobic digestates that can be used as fertilizers in agricultural soils. In this context, the management of the OW treatment process to maximize agro-system sustainability satisfying the crop nutrient demands represents the main goal. To investigate these traits, two protocols to assess the plant availability of digestate nitrogen (N) and phosphorus (P) were evaluated. With this aim, the N and P availability was determined on 8 digestates and 2 types of digestate-based compost from different OW via sequential chemical extractions (SCE). In addition, the digestates were tested in soil incubations and in plant pot tests with Italian ryegrass and compared with chemical fertilizer and a non-amended control soil. The N extracted from digestates via SCE was related to soil N mineralization and plant N recovery. The C: N ratio had negative impact on mineralized N and its recovery in shoots (ShootsN = −0.0085.(C/N)+0.172, r2 = 0.67), whereas water extractable mineral N was positevely related to the root N apparent recovery fraction (N-ARF) with (RootsN = 5E−5.Nsolublemin+0.0138, r2 = 0.53). The shoot P-ARF was positively correlated with the inorganic water extractable fraction of P (ShootsP =0.1153.H2O-Pi−0.2777.H2O-Po+0.0249, r2 = 0.71) whereas the root P-ARF was positively correlated with the less accessible fractions (RootsP = (b) 0.0955.NaHCO3-Po+0.0955.NaOH-Po-0.0584NaHCO3-Pi+0.0128, r2 = 0.8641). Feedstock digestate typology impacted the N and P recovery results leading to a better description of the typology properties and a first nutrients ARF prediction.

Published
2020
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6. Assessment of fungal and thermo-alkaline post-treatments of solid digestate in a recirculation scheme to increase flexibility in feedstocks supply management of biogas plants

Author

Aude Bertrandias, Julie Jimenez, Ulysse Brémond, Nicolas Bernet, Denis Loisel, Jean-Philippe Steyer, Hélène Carrère, Air Liquide, Centre de Recherche Claude-Delorme, Paris-Saclay, France., 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 Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and National Research and Technology Association (ANRT, France) PhD grant (reference CIFRE N° 2016/0617)

Subjects
020209 energy, 02 engineering and technology, Raw material, 7. Clean energy, Methane, Solid digestate recirculation, chemistry.chemical_compound, Biogas, Anaerobic digestion, 0202 electrical engineering, electronic engineering, information engineering, 0601 history and archaeology, Organic matter, Fungal post-treatment, 2. Zero hunger, chemistry.chemical_classification, 060102 archaeology, Renewable Energy, Sustainability and the Environment, [SDE.IE]Environmental Sciences/Environmental Engineering, 06 humanities and the arts, Pleurotus ostreatus, Biodegradation, Thermo-alkaline post-treatment, Pulp and paper industry, chemistry, Solid-state fermentation, Agricultural biogas plant, Digestate, Environmental science
Abstract

Agricultural biogas plants can suffer occasional feedstock shortages (poor harvest, storage …) and recirculation of solid digestate (SD) into digester has been identified as a simple way to offset methane production loss from these situations. Calculations show that recirculation of SD could offset for losses in plant methane production by up to 2.4%. In that context, two post-treatments were evaluated to enhance residual potential methane of agricultural SD. Effect of fungal solid state fermentation (SSF) of SD on subsequent methane production has never been explored before. It was hypothesized that: (i) ligninolytic fungi would be able to specifically use the complex fraction of SD for their growth and (ii) energy generation from the subsequent anaerobic digestion of the colonized SD will be enhanced. However, experiments showed that thermo-alkaline treatment of SD (used as alkalinization and sterilization process) and a high spawn level (20% w/w) were necessary to perform fungal SSF. Besides, the observed fungal activities on SD did not target specifically the most complex fractions. This led to uncontrolled organic matter losses and subsequent decreases of biodegradability and methane yield of SD (up to 50%). Therefore, fungal SSF of SD before its recirculation into biogas plants appeared not to be a viable option. Only thermo-alkaline treatment (CaO 2% w/w and 121 °C 30 min) enhanced methane yield of SD by 13% and decreased its complex fraction by 25%. Further studies on optimization of this post-treatment may enhance efficiency of SD recirculation strategy to offset plant methane production losses.

Published
2020
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7. 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
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8. Characterisation of the biodegradability of post-treated digestates via the chemical accessibility and complexity of organic matter

Author

Mylène Daumoin, Céline Druilhe, Anne-Marie Pourcher, Julie Jimenez, Nathalie Wéry, Géraldine Maynaud, Dominique Patureau, Michel Torrijos, 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), Optimisation des procédés en Agriculture, Agroalimentaire et Environnement (UR OPAALE), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Université Bretagne Loire (UBL), ADEME grant number 1306C0032, Wéry, Nathalie, 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
anaerobic digestion, Environmental Engineering, respirometry, spectroscopie à fluorescence, digestate, biodegradability, complexity, [SDV]Life Sciences [q-bio], 020209 energy, digestion anaérobie, Bioengineering, Fraction (chemistry), 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Soil, 0202 electrical engineering, electronic engineering, information engineering, Anaerobic treatment, Organic chemistry, Organic matter, Anaerobiosis, Organic Chemicals, digestat, Waste Management and Disposal, 0105 earth and related environmental sciences, Biological Oxygen Demand Analysis, 2. Zero hunger, chemistry.chemical_classification, Principal Component Analysis, Sewage, respirométrie, Renewable Energy, Sustainability and the Environment, biodégradabilité, General Medicine, Biodegradation, Pulp and paper industry, Aerobiosis, Refuse Disposal, Kinetics, Anaerobic digestion, Biodegradation, Environmental, post traitement, chemistry, Digestate, dégradation de la matière organique, Volatilization, Linear correlation
Abstract

The stability of digestate organic matter is a key parameter for its use in agriculture. Here, the organic matter stability was compared between 14 post-treated digestates and the relationship between organic matter complexity and biodegradability was highlighted. Respirometric activity and CH4 yields in batch tests showed a positive linear correlation between both types of biodegradability (R2=0.8). The accessibility and complexity of organic matter were assessed using chemical extractions combined with fluorescence spectroscopy, and biodegradability was mostly anti-correlated with complexity of organic matter. Post-treatments presented a significant effect on the biodegradability and complexity of organic matter. Biodegradability was low for composted digestates which comprised slowly accessible complex molecules. Inversely, solid fractions obtained after phase separation contained a substantial part of remaining biodegradable organic matter with a significant easily accessible fraction comprising simpler molecules. Understanding the effect of post-treatment on the biodegradability of digestates should help to optimize their valorization.

Published
2017
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9. Characterization and prediction of organic nitrogen biodegradability during anaerobic digestion: A bioaccessibility approach

Author

Anne Tremier, Y. Bareha, R. Girault, Julie Jimenez, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Optimisation des procédés en Agriculture, Agroalimentaire et Environnement (UR OPAALE), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), 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), This study was part of the MéthaPolSol and Concept-dig projects which are supported by the French Environment and Energy Agency (ADEME), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), 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 des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Rennes-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), and Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)

Subjects
anaerobic digestion, Environmental Engineering, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, 020209 energy, chemistry.chemical_element, Bioengineering, 02 engineering and technology, Fractionation, 010501 environmental sciences, engineering.material, 01 natural sciences, nitrogen, chemistry.chemical_compound, biodegradability, 0202 electrical engineering, electronic engineering, information engineering, [CHIM]Chemical Sciences, Ammonium, Anaerobiosis, Fertilizers, Waste Management and Disposal, Nitrogen cycle, 0105 earth and related environmental sciences, Sewage, Renewable Energy, Sustainability and the Environment, General Medicine, Biodegradation, Nitrogen, Carbon, bioaccessibility, ammonium, Anaerobic digestion, chemistry, Environmental chemistry, engineering, Fertilizer
Abstract

[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [ADD1_IRSTEA]Valoriser les effluents et déchets organiques; International audience; Prediction of organic nitrogen mineralization into ammonium during anaerobic digestion is required for optimizing substitution of mineral fertilizer by digestates. The aim of this study was to understand organic nitrogen biodegradability and to investigate how it can be predicted from carbon biodegradability, and nitrogen bioaccessibility, respectively. Bioaccessibility was assessed using fractionation methods based on sequential extractions. Results showed that organic nitrogen was present in fractions whose bioaccessibility levels differed. Organic nitrogen and carbon biodegradability were also determined and compared. Results highlighted two groups of substrates: the first with an initial NH/TKN 30%, whose carbon and nitrogen biodegradability differ significantly. To enable prediction on all substrates, partial least square (PLS) regressions were carried out to link organic nitrogen bioaccessibility indicators to biodegradability. The models successfully predicted organic nitrogen biodegradability with a maximum prediction error of 10%.

Published
2018
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10. Fast ADM1 implementation for the optimization of feeding strategy using near infrared spectroscopy

Author

Jean-Philippe Steyer, Michel Torrijos, Cyrille Charnier, Eric Latrille, Philippe Sousbie, Julie Jimenez, Jérémie Miroux, 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), BioEnTech, 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 Charnier, Cyrille

Subjects
anaerobic digestion, ADM1, spectroscopy, kinetics, methane potential, modeling, Environmental Engineering, 020209 energy, [SDV]Life Sciences [q-bio], Kinetics, Analytical chemistry, digestion anaérobie, 02 engineering and technology, 010501 environmental sciences, 7. Clean energy, 01 natural sciences, near-infrared, modelling, Bioreactors, Partial least squares regression, 0202 electrical engineering, electronic engineering, information engineering, Biochemical composition, Anaerobiosis, Methane production, Waste Management and Disposal, 0105 earth and related environmental sciences, Water Science and Technology, Civil and Structural Engineering, modélisation, Spectroscopy, Near-Infrared, cinétique, Chemistry, Ecological Modeling, Near-infrared spectroscopy, Pollution, potentiel méthane, Anaerobic digestion, Yield (chemistry), spectroscopie proche infrarouge, Biological system, Anaerobic exercise
Abstract

Optimization of feeding strategy is an essential issue of anaerobic co-digestion that can be greatly assisted with simulation tools such as the Anaerobic Digestion Model 1. Using this model, a set of parameters, such as the biochemical composition of the waste to be digested, its methane production yield and kinetics, has to be defined for each new substrate. In the recent years, near infrared analyses have been reported as a fast and accurate solution for the estimation of methane production yield and biochemical composition. However, the estimation of methane production kinetics requires time-consuming analysis. Here, a partial least square regression model was developed for a fast and efficient estimation of methane production kinetics using near infrared spectroscopy on 275 bio-waste samples. The development of this characterization reduces the time of analysis from 30 days to a matter of minutes. Then, biochemical composition and methane production yield and kinetics predicted by near infrared spectroscopy were implemented in a modified Anaerobic Digestion Model n°1 in order to simulate the performance of anaerobic digestion processes. This approach was validated using different data sets and was demonstrated to provide a powerful predictive tool for advanced control of anaerobic digestion plants and feeding strategy optimization.

Published
2017
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11. Development of a soft extraction method for sulfamethoxazole and transformation products from agricultural soils: Effects of organic matter co-extraction on the environmental availability assessment

Author

Anaïs Goulas, Julie Jimenez, Marjolaine Bourdat-Deschamps, Dominique Patureau, Claire-Sophie Haudin, Pierre Benoit, Sylvie Nélieu, Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Université Paris-Saclay, 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 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 Deschamps, Marjolaine

Subjects
Environmental Engineering, 010504 meteorology & atmospheric sciences, Biosolids, Sulfamethoxazole, [SDV]Life Sciences [q-bio], Amendment, Fluorescence spectrometry, 010501 environmental sciences, Adsorption, Freely-dissolved fraction, Organic waste product, Sulfonamide, 01 natural sciences, complex mixtures, Chemistry Techniques, Analytical, Soil, Dissolved organic carbon, Environmental Chemistry, Animals, Soil Pollutants, Organic matter, Waste Management and Disposal, 0105 earth and related environmental sciences, 2. Zero hunger, chemistry.chemical_classification, Sewage, Chemistry, Soil organic matter, Agriculture, 15. Life on land, Pollution, 6. Clean water, Humus, Manure, Environmental chemistry, Cattle, Cow dung
Abstract

The recycling of biosolids and livestock manure in agriculture may lead to the introduction of antibiotic residues, i.e., parent molecule and transformation products, into amended soils. Their fate in soils can be approached through the assessment of their environmental availability. In this work, the environmental availability of sulfamethoxazole (SMX) and three transformation products (N4-acetyl-SMX, 3-amino-5-methylisoxazole, aniline) was assessed in soils amended with sludge compost or cow manure throughout a three-month incubation, using soft extractions with CaCl2, EDTA or cyclodextrin solutions. First, the freeze-storage of soil samples was shown to decrease the SMX extractability. The SMX extractability depended on the initial concentration, the amendment type and the extracting solution at day 0. From 1.9% up to 63% of the SMX total content was initially extractable. The lowest fractions were quantified in EDTA extracts in which the dissolved organic matter was the most complex and responsible for high matrix effects in mass spectrometry compared to CaCl2 extracts. The purification of cyclodextrin extracts highly reduced the matrix effects, but CaCl2 was considered as the most suitable extractant. SMX extractability strongly decreased after the first 8days of incubation to finally reach 0.4-0.8% after 84days, whatever the initial conditions. This high decrease could be related to humification observed through the increasing complexity of extracted dissolved organic matter. Very low levels of transformation products were quantified throughout the incubation period. The low environmental availability of SMX was mainly due to its sorption on soil organic matter and resulted in its low biotransformation in these amended soils.

Published
2017
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12. Typologie des digestats de méthanisation à partir de paramètres usuels de valeur amendement/fertilisante

Author

Felipe Guilayn, Julie Jimenez, Rouez, M., Dominique Steyer, 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), Centre International de Recherche Sur l'Eau et l'Environnement [Suez] (CIRSEE), SUEZ ENVIRONNEMENT (FRANCE), Association Technique Energie Environnement (ATEE). FRA., Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), CIRSEE, and Suez Environnement

Subjects
économie de filière, treatment, méthanisation, valorisation, [SDV]Life Sciences [q-bio], impact environnemental, resource management, valorization, biogaz, procédé anaérobie, environmental impact, gestion des ressources, traitement
Abstract

Typologie des digestats de méthanisation à partir de paramètres usuels de valeur amendement/fertilisante. Journées Recherche et Industrie biogaz méthanisation - JRI 2017

Published
2017
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13. Methane production and fertilizing value of organic waste: organic matter characterization for a better prediction of valorization pathways

Author

Sabine Houot, Jean-Philippe Steyer, Han Lei, Julie Jimenez, Dominique Patureau, 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), Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, 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 Jimenez, Julie

Subjects
Environmental Engineering, 020209 energy, [SDV]Life Sciences [q-bio], Bioengineering, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, methane production, soil, biodegradability, 0202 electrical engineering, electronic engineering, information engineering, Organic matter, fluorescence, accessibility, Fertilizers, Waste Management and Disposal, 0105 earth and related environmental sciences, 2. Zero hunger, Total organic carbon, chemistry.chemical_classification, Renewable Energy, Sustainability and the Environment, Soil organic matter, Environmental engineering, General Medicine, Biodegradable waste, 15. Life on land, Biodegradation, Carbon, Biodegradation, Environmental, chemistry, Environmental chemistry, Environmental science, Soil fertility, Valorisation, Methane, Organic fertilizer
Abstract

Organic wastes are potential sources of both energy as well as crop production fertilizers. Correlations and models, involving organic matter characterization, have been previously described by several authors although there is still a lack in knowledge on the potential of simultaneous predictions of methane and organic fertilizer quality to optimize the wastes treatments. A methodology combining chemical accessibility and fluorescence spectroscopy was used to characterise 82 different organic wastes. Characterization data were compared with the biochemical methane potential (BMP), and with the biodegradable organic carbon obtained by soil incubation (C_bio). High correlations values were observed (R2 of 0.818 for BMP and 0.845 for C_bio). Model coefficients highlighted the differences and similarities between anaerobic and aerobic soil biodegradation, suggesting that anaerobic recalcitrant molecules could enhance soil fertility. This is a first step in the development of a tool for optimizing both types of valorisation according to agrosystem needs and constraints.

Published
2017
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14. Instrumentation and control of anaerobic digestion processes: a review and some research challenges

Author

Olivier Bernard, Eric Latrille, Christian Wolf, T. Ribeiro, Daniel Zitomer, Hugo Oscar Méndez-Acosta, José Ferrer, Victor Alcaraz-Gonzalez, Fabian Jacobi, Sofiane Mazhegrane, Daniel Gaida, Julie Jimenez, Alan J. Guwy, Richard M. Dinsdale, Giuliano C. Premier, Dennis Totzke, André Pauss, Francis Mairet, Ángel Robles, Gonzalo Ruiz-Filippi, Henri Spanjers, Aurora Seco, Jérôme Harmand, Jean-Philippe Steyer, 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 Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Magnitude, Research and Development, CGG Veritas, Hugues, University of Cologne, Biological control of artificial ecosystems (BIOCORE), Laboratoire d'océanographie de Villefranche (LOV), Observatoire océanologique de Villefranche-sur-mer (OOVM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Villefranche-sur-mer (OOVM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de la Recherche Agronomique (INRA), Departamento de Ingenierıa Quimica-CUCEI (CUCEI), Universidad Jesuita de Guadalajara (ITESO), Department of Civil, Construction and Environmental Engineering [Milwaukee], Marquette University [Milwaukee], Applied Technologies, Applied Technologies, Inc.-Applied Technologies, Inc., Centre d'Immunologie de Marseille - Luminy (CIML), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Molecular Hepatology, Department of Medicine II, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany, Sustainable Environment Research Centre, University of South Wales (USW), Pontifical Catholic University of Valparaiso, University of Valencia, Institut Polytechnique LaSalle Beauvais, Transformation Intégrée de la Matière Renouvelable (TIMR), Université de Technologie de Compiègne (UTC), financial support of INRA, ANR Phycover (project ANR-14-CE04-0011) and ADEME for Inter-laboratory assay financial support, ANR-14-CE04-0011,Phycover,Durabilité des productions microalgales par recyclage du phosphore et de l'azote des eaux résiduaires : vers la station d'épuration du futur(2014), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Department of Automation and Industrial IT, Cologne University, Institut National de la Recherche Agronomique (INRA)-Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'océanographie de Villefranche (LOV), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Villefranche-sur-mer (OOVM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Villefranche-sur-mer (OOVM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Civil, Construction and Environmental Engineering, Marquette University, Marquette University, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), 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), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
anaerobic digestion, INGENIERIA HIDRAULICA, Environmental Engineering, Municipal solid waste, diagnosis, Characterization, [SDV]Life Sciences [q-bio], Applied Microbiology and Biotechnology, Diagnosis, 12. Responsible consumption, [SPI]Engineering Sciences [physics], Biogas, Anaerobic digestion, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Control, Organic matter, characterization, Instrumentation (computer programming), [MATH]Mathematics [math], Instrumentation, Waste Management and Disposal, TECNOLOGIA DEL MEDIO AMBIENTE, Resource recovery, organic matter, 2. Zero hunger, chemistry.chemical_classification, instrumentation, Waste management, Pollution, 6. Clean water, chemistry, 13. Climate action, Digestate, Environmental science, Sewage treatment, control
Abstract

[EN] To enhance energy production from methane or resource recovery from digestate, anaerobic digestion processes require advanced instrumentation and control tools. Over the years, research on these topics has evolved and followed the main fields of application of anaerobic digestion processes: from municipal sewage sludge to liquid mainly industrial then municipal organic fraction of solid waste and agricultural residues. Time constants of the processes have also changed with respect to the treated waste from minutes or hours to weeks or months. Since fast closed loop control is needed for short time constant processes, human operator is now included in the loop when taking decisions to optimize anaerobic digestion plants dealing with complex solid waste over a long retention time. Control objectives have also moved from the regulation of key variables measured online to the prediction of overall process perfor- mance based on global off-line measurements to optimize the feeding of the processes. Additionally, the need for more accurate prediction of methane production and organic matter biodegradation has impacted the complexity of instrumentation and should include a more detailed characterization of the waste (e.g., biochemical fractions like proteins, lipids and carbohydrates)andtheirbioaccessibility andbiodegradability characteristics. However, even if in the literature several methodologies have been developed to determine biodegradability based on organic matter characterization, only a few papers deal with bioaccessibility assessment. In this review, we emphasize the high potential of some promising techniques, such as spectral analysis, and we discuss issues that could appear in the near future concerning control of AD processes., The authors acknowledge the financial support of INRA (the French National Institute for Agricultural Research), the French National Research Agency (ANR) for the "Phycover" project (project ANR-14-CE04-0011) and ADEME for Inter-laboratory assay financial support.

Published
2015
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15. New fractionation for a better bioaccessibility description of particulate organic matter in a modified ADM1 model

Author

Alexis Mottet, Jean-Philippe Steyer, Hélène Carrère, Fabien Vedrenne, Stéphane Déléris, Julie Jimenez, Ivan Ramirez, 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), and VEOLIA France

Subjects
anaerobic digestion, General Chemical Engineering, [SDV]Life Sciences [q-bio], solid wastes, 0207 environmental engineering, hydrolysis kinetic, Biomass, Fraction (chemistry), 02 engineering and technology, Fractionation, biological sludge, 010501 environmental sciences, 7. Clean energy, 01 natural sciences, Industrial and Manufacturing Engineering, Methane, chemistry.chemical_compound, Hydrolysis, biodegradability, Environmental Chemistry, 020701 environmental engineering, degradation kinetic, 0105 earth and related environmental sciences, Chromatography, sewage sludge, modeling, General Chemistry, kinetic model, 6. Clean water, adm1, Anaerobic digestion, Activated sludge, waste activated sludge, chemistry, Volume (thermodynamics), hydrolysis, 13. Climate action, [SDE]Environmental Sciences, solubilization
Abstract

International audience; A new model structure for the hydrolysis step is introduced in the IWA anaerobic digestion model no 1 (ADM1) in order to better represent the bioaccessibility of particulate organic matter. Two particulate organic matter fractions for waste activated sludge (WAS) samples were defined; a readily hydrolysable fraction (X-cr) and a slowly hydrolysable fraction (X-cs). These fractions were hydrolyzed according to a surface-limiting reaction. Batch anaerobic digestion test of untreated WAS was used to develop the model and calibrate the kinetic parameters and biomass concentrations. The validation was carried out with a similar substrate than the calibration but a thermal pretreatment was applied at two different conditions (110 degrees C and 220 degrees C). The behavior of thermophilic anaerobic digestion of WAS samples was effectively represented by the proposed model. No changes among kinetic parameter sets were done and the model is able to represent produced methane volume following the intrinsic changes of the WAS composition through the different thermal pretreatment conditions. Moreover, estimated parameters in 20 days of batch anaerobic digestion test were representative of continuous anaerobic digestion in a full-scale digester.

Published
2013
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