title: Comparison of biogas recovery from MSW using different aerobic-anaerobic operation modes.
abstract: Aeration pretreatment was demonstrated as an efficient technology to promote methane recovery from a bioreactor landfill with high food waste content. In this study, a short-term experiment was conducted to investigate the effects of aerobic-anaerobic operation modes on biogas recovery. Three landfill-simulated columns (anaerobic control (A1), a constant aeration (C1) and a gradually reduced aeration (C2)) were constructed and operated for 130days. The aeration frequency was adjusted by oxygen consumption in an aerated MSW landfill. After aerobic pretreatment was halted, the methanogenic phase was rapidly developed in both the C1 and C2 columns, reducing the volatile fatty acid (VFA) concentrations and increasing pH. The methane volumes per dry MSW produced from the C1 and C2 columns were approximately 62L/kg VS and 75L/kg VS, respectively, while methane produced from the A1 column was almost negligible. The result clearly showed that aerobic pretreatment with gradual reduction of aeration rates could not only improve methane recovery from waste decomposition, but also enhance leachate COD and VFA removal.
authors.affiliation: Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China.
authors.forename: Qiyong
authors.initials: Q
authors.lastname: Xu
authors.affiliation: Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Department of Environmental Science and Engineering, Gannon University, Erie, PA 16541, USA.
authors.forename: Hwidong
authors.initials: H
authors.lastname: Kim
authors.affiliation: Key Laboratory for Eco-efficient Polysilicate Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong 518055, China. Electronic address: jaehacko@pkusz.edu.cn.
authors.forename: Jae Hac
authors.initials: JH
authors.lastname: Ko
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis*; D008697:Methane / Q000032:analysis*; D010100:Oxygen / Q000032:analysis*; D062611:Solid Waste / Q000032:analysis*; D064091:Waste Disposal Facilities
chemical_list: D056804:Biofuels; D062611:Solid Waste; D008697:Methane; D010100:Oxygen
keywords: Aeration pretreatment; Bioreactor; Leachate quality; MSW; Methane generation; Oxygen consumption