title: Distributed model of solid waste anaerobic digestion: effects of leachate recirculation and pH adjustment.
abstract: A distributed model of solid waste digestion in a 1-D bioreactor with leachate recirculation and pH adjustment was developed to analyze the balance between the rates of polymer hydrolysis/acidogenesis and methanogenesis during the anaerobic digestion of municipal solid waste (MSW). The model was calibrated on previously published experimental data generated in 2-L reactors filled with shredded refuse and operated with leachate recirculation and neutralization. Based on model simulations, both waste degradation and methane production were stimulated when inhibition was prevented rapidly from the start, throughout the reactor volume, by leachate recirculation and neutralization. An optimal strategy to reduce the time needed for solid waste digestion is discussed.
authors.affiliation: Water Problems Institute, Russian Academy of Sciences, Moscow 119991, Russia. vavilin@hotmail.com
authors.forename: Vasily A
authors.initials: VA
authors.lastname: Vavilin
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Rytov
authors.forename: Ljudmila Ya
authors.initials: LY
authors.lastname: Lokshina
authors.forename: Spyros G
authors.initials: SG
authors.lastname: Pavlostathis
authors.forename: Morton A
authors.initials: MA
authors.lastname: Barlaz
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008697:Methane / Q000378:metabolism; D008956:Models, Chemical; D014866:Waste Products
chemical_list: D014866:Waste Products; D008697:Methane