title: Effects of exogenous aerobic bacteria on methane production and biodegradation of municipal solid waste in bioreactors.
abstract: Landfill is the most common and efficient ways of municipal solid waste (MSW) disposal and the landfill biogas, mostly methane, is currently utilized to generate electricity and heat. The aim of this work is to study the effects and the role of exogenous aerobic bacteria mixture (EABM) on methane production and biodegradation of MSW in bioreactors. The results showed that the addition of EABM could effectively enhance hydrolysis and acidogenesis processes of MSW degradation, resulting in 63.95% reduction of volatile solid (VS), the highest methane production rate (89.83Lkg(-1) organic matter) ever recorded and a threefold increase in accumulative methane production (362.9L) than the control (127.1L). In addition, it is demonstrated that white-rot fungi (WRF) might further promote the methane production through highly decomposing lignin, but the lower pH value in leachate and longer acidogenesis duration may cause methane production reduced. The data demonstrated that methane production and biodegradation of MSW in bioreactors could be significantly enhanced by EABM via enhanced hydrolysis and acidogenesis processes, and the results are of great economic importance for the future design and management of landfill.
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China; University of the Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Sai
authors.initials: S
authors.lastname: Ge
authors.affiliation: State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China. Electronic address: qiangx@whrsm.ac.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xue
authors.affiliation: Key Laboratory of Agricultural and Environmental Microbiology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China. Electronic address: yzm@wh.iov.cn.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Yuan
mesh_terms: D001420:Bacteria, Aerobic; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D008697:Methane / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D062611:Solid Waste; D064091:Waste Disposal Facilities
chemical_list: D062611:Solid Waste; D008697:Methane
keywords: Biodegradation; Bioreactors; Exogenous aerobic bacteria; Methane production; Municipal solid waste