Distributed model of solid waste anaerobic digestion: effects of leachate recirculation and pH adjustment.
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.
Vavilin
Vasily A
VA
Water Problems Institute, Russian Academy of Sciences, Moscow 119991, Russia. vavilin@hotmail.com
Rytov
Sergey V
SV
Lokshina
Ljudmila Ya
LY
Pavlostathis
Spyros G
SG
Barlaz
Morton A
MA
D000693:Anaerobiosis; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008697:Methane / Q000378:metabolism; D008956:Models, Chemical; D014866:Waste Products
D014866:Waste Products; D008697:Methane