title: Application of Anaerobic Digestion Model No. 1 to describe the syntrophic acetate oxidation of poultry litter in thermophilic anaerobic digestion.
abstract: A molecular analysis found that poultry litter anaerobic digestion was dominated by hydrogenotrophic methanogens which suggests that bacterial acetate oxidation is the primary pathway in the thermophilic digestion of poultry litter. IWA Anaerobic Digestion Model No. 1 (ADM1) was modified to include the bacterial acetate oxidation process in the thermophilic anaerobic digestion (TAD). Two methods for ADM1 parameter estimation were applied: manual calibration with non-linear least squares (MC-NLLS) and an automatic calibration using differential evolution algorithms (DEA). In terms of kinetic parameters for acetate oxidizing bacteria, estimation by MC-NLLS and DEA were, respectively, km 1.12 and 3.25 ± 0.56 kg COD kg COD(-1)d(-1), KS 0.20 and 0.29 ± 0.018 kg COD m(-3) and Yac-st 0.14 and 0.10 ± 0.016 kg COD kg COD(-1). Experimental and predicted volatile fatty acids and biogas composition were in good agreement. Values of BIAS, MSE or INDEX demonstrate that both methods (MC-NLLS and DEA) increased ADM1 accuracy.
authors.affiliation: Departamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo, Chapingo, Estado de México 56230, Mexico.
authors.forename: Víctor
authors.initials: V
authors.lastname: Rivera-Salvador
authors.affiliation: Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, Estado de México 56230, Mexico.
authors.forename: Irineo L
authors.initials: IL
authors.lastname: López-Cruz
authors.affiliation: Departamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo, Chapingo, Estado de México 56230, Mexico; Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112-1000, USA. Electronic address: t.espinosa.s@taurus.chapingo.mx.
authors.forename: Teodoro
authors.initials: T
authors.lastname: Espinosa-Solares
authors.affiliation: Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, Mexico City, DF 07340, Mexico.
authors.forename: Juan S
authors.initials: JS
authors.lastname: Aranda-Barradas
authors.affiliation: Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112-1000, USA; Department of Biology, West Virginia State University, Institute, WV 25112-1000, USA.
authors.forename: David H
authors.initials: DH
authors.lastname: Huber
authors.affiliation: Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112-1000, USA; Department of Biology, West Virginia State University, Institute, WV 25112-1000, USA.
authors.forename: Deepak
authors.initials: D
authors.lastname: Sharma
authors.affiliation: Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112-1000, USA.
authors.forename: J Ulises
authors.initials: JU
authors.lastname: Toledo
mesh_terms: D000085:Acetates / Q000378:metabolism*; D000693:Anaerobiosis; D000818:Animals; D001105:Archaea / Q000235:genetics; D044822:Biodiversity; D018533:Biomass; D002645:Chickens; D007700:Kinetics; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature; D014866:Waste Products
chemical_list: D000085:Acetates; D012336:RNA, Ribosomal, 16S; D014866:Waste Products
keywords: Anaerobic digestion model; Differential evolution algorithms; Kinetic parameters; Non-linear least squares; Parameter estimation