title: Effective bio-treatment of fresh leachate from pretreated municipal solid waste in an expanded granular sludge bed bioreactor.
abstract: This research investigated the anaerobic biodegradation of fresh leachate from pretreated municipal solid waste (MSW) in an expanded granular sludge bed (EGSB) bioreactor under mesophilic conditions. The observations showed that this bioreactor, inoculated with anaerobic granular sludge, could be readily activated. The chemical oxygen demand (COD) removal efficiency varied between 88% and 97% under normal operation conditions, and was kept at 94-96% under the proposed optimal conditions. We noted that 60-80% of the produced biogas was methane that was yielded at a rate depending on the organic loading rate (OLR) and the liquid up-flow velocity (Vup). Significantly, 80% of loaded COD or 83% of biodegraded COD was converted to methane under the proposed optimal conditions. These findings indicate that the fresh leachate from pretreated MSW can be efficiently treated in the EGSB bioreactor, and moreover, methane, a renewable energy, can be continuously generated.
authors.affiliation: Department of Environmental Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China.
authors.forename: Jianyong
authors.initials: J
authors.lastname: Liu
authors.forename: Jiangping
authors.initials: J
authors.lastname: Zhong
authors.forename: Yilan
authors.initials: Y
authors.lastname: Wang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Guangren
authors.initials: G
authors.lastname: Qian
authors.forename: Liyun
authors.initials: L
authors.lastname: Zhong
authors.forename: Rongzhong
authors.initials: R
authors.lastname: Guo
authors.forename: Peijun
authors.initials: P
authors.lastname: Zhang
authors.forename: Zhi Ping
authors.initials: ZP
authors.lastname: Xu
mesh_terms: D000641:Ammonia / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D056804:Biofuels; D019149:Bioreactors / Q000382:microbiology; D002245:Carbon Dioxide / Q000032:analysis; D002947:Cities; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000378:metabolism; D010100:Oxygen / Q000302:isolation & purification; D012037:Refuse Disposal / Q000295:instrumentation*; D012212:Rheology; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D056804:Biofuels; D012722:Sewage; D014874:Water Pollutants, Chemical; D002245:Carbon Dioxide; D000641:Ammonia; D008697:Methane; D010100:Oxygen