title: Influence of organic loading rate on methane production in a CSTR from physicochemical sludge generated in a poultry slaughterhouse.
abstract: The influence of the increase of the organic loading rate (OLR) on methane production in a continuous stirred-tank reactor (CSTR) from physicochemical sludge generated in a poultry slaughterhouse was evaluated. Total solid (TS) to obtain OLR of 1, 5, 10 and 15 g VS L(-1) day(-1), with hydraulic retention times of 29, 6, 6 and 4, respectively, were conditioned. The results showed a decrease in pH levels and an increase in the theoretical volatile fatty acids (VFA). While the yield of methane production decreased from 0.48 to 0.10 LCH4/g VSremoved, respectively, the OLR-10 managed on average 38% removal of volatile solids (VS) and a yield biogas production of 0.81 Lbiogas g(-1) VSremoved and 1.35 L day(-1). This suggests that the OLR increases in an anaerobic system from physicochemical sludge only inhibits the methanogenic metabolism, because there is still substrate consumption and biogas production.
authors.affiliation: a Instituto de Biotecnología y Ecología Aplicada (INBIOTECA), Universidad Veracruzana , Xalapa , Veracruz , México.
authors.forename: Luis A
authors.initials: LA
authors.lastname: López-Escobar
authors.forename: Sergio
authors.initials: S
authors.lastname: Martínez-Hernández
authors.forename: Grisel
authors.initials: G
authors.lastname: Corte-Cano
authors.forename: Juan M
authors.initials: JM
authors.lastname: Méndez-Contreras
mesh_terms: D000003:Abattoirs; D000818:Animals; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000378:metabolism*; D011200:Poultry; D012722:Sewage / Q000737:chemistry*
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D012722:Sewage; D008697:Methane
keywords: Anaerobic digestion; CSTR; OLR; inhibition; methane production; pH; physicochemical sludge