title: Transformation of dissolved organic matters in landfill leachate-bioelectrochemical system.
abstract: A membraneless bioelectrochemical system (BES) reactor and an anoxic/oxic (A/O) reactor of identical configurations were applied to treat the landfill leachate (20,100 mg l(-1) chemical oxygen demand (COD) and 1330 mg l(-1) NH4(+)-N) at 24-h hydraulic retention time and 3 kg chemical oxygen demand m(-3) d(-1) volume loading. The BES with maximum power density of 2.77±0.26 W m(-3) and internal resistance of 47.5±1.4 Ω removed 84-89% COD and 94-98% NH4(+)-N, 11% and 47%, respectively, higher than the A/O reactor. The dissolved organic matters (DOM) in effluents from the BES and the A/O reactor were for the first time characterized and compared. The MFC preferentially degraded hydrophilic fraction (HPI) of the fed DOM and yielded excess humin with high aromaticity. The electric fields by bioelectrochemical reactions occurred at cathode stimulate the activities of COD degraders and nitrifiers in biofilms to enhance ammonium removals by BES reactor.
authors.affiliation: Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, China; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10617, Taiwan.
authors.forename: Guodong
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Research Institute of Transition of Research-based Economics, Department of Environmental Economics, Shanxi University of Finance and Economics, Taiyuan 030006, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Jiao
authors.affiliation: Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan. Electronic address: djlee@ntu.edu.tw.
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D055664:Electrochemical Techniques / Q000379:methods*; D006812:Humic Substances; D012995:Solubility; D064091:Waste Disposal Facilities
chemical_list: D006812:Humic Substances
keywords: Anoxic/oxic; Dissolved organic matter; Fractionation; Landfill leachate; Microbial fuel cell