title: Comparison of existing models to simulate anaerobic digestion of lipid-rich waste.
abstract: Models for anaerobic digestion of lipid-rich waste taking inhibition into account were reviewed and, if necessary, adjusted to the ADM1 model framework in order to compare them. Experimental data from anaerobic digestion of slaughterhouse waste at an organic loading rate (OLR) ranging from 0.3 to 1.9kgVSm-3d-1were used to compare and evaluate models. Experimental data obtained at low OLRs were accurately modeled whatever the model thereby validating the stoichiometric parameters used and influent fractionation. However, at higher OLRs, although inhibition parameters were optimized to reduce differences between experimental and simulated data, no model was able to accurately simulate accumulation of substrates and intermediates, mainly due to the wrong simulation of pH. A simulation using pH based on experimental data showed that acetogenesis and methanogenesis were the most sensitive steps to LCFA inhibition and enabled identification of the inhibition parameters of both steps.
authors.affiliation: Irstea, UR OPAALE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France. Electronic address: fabrice.beline@irstea.fr.
authors.forename: F
authors.initials: F
authors.lastname: Béline
authors.affiliation: Département de génie civil et de génie des eaux, Université Laval, Québec, QC G1V 0A6, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Rodriguez-Mendez
authors.affiliation: Irstea, UR OPAALE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France; Université Européenne de Bretagne, F-35044 Rennes, France.
authors.forename: R
authors.initials: R
authors.lastname: Girault
authors.affiliation: Centre de Recherche Industrielle du Québec (CRIQ), 333 rue Franquet, Québec, QC G1P 4C7, Canada.
authors.forename: Y Le
authors.initials: YL
authors.lastname: Bihan
authors.affiliation: Département de génie civil et de génie des eaux, Université Laval, Québec, QC G1V 0A6, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Lessard
mesh_terms: D000003:Abattoirs; D000693:Anaerobiosis; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008055:Lipids; D008697:Methane / Q000096:biosynthesis; D008962:Models, Theoretical; D015203:Reproducibility of Results; D018505:Waste Management / Q000295:instrumentation / Q000379:methods*; D014866:Waste Products
chemical_list: D008055:Lipids; D014866:Waste Products; D008697:Methane
keywords: ADM1; Anaerobic digestion; Inhibition; Lipid-rich waste; Modelling