title: A lab-scale anoxic/oxic-bioelectrochemical reactor for leachate treatments.
abstract: A membraneless, liter-scale bioelectrochemical reactor with both bioanode and biocathode was established for landfill leachate treatment. Anoxic/oxic (A/O) zones at anode compartment and cathode compartment, respectively, were connected with a reflux to facilitate nitrogen removal. With raw landfill leachate of 17,500-22,600 mg L(-1) chemical oxygen demand (COD) and 1170-1490 mg L(-1) NH4(+)-N, the tested reactor removed 89.1±1.6% of chemical oxygen demand and 99.2±0.1% of NH4(+)-N at 3.0 kg COD m(-3) d(-1). The corresponding maximum power density was 2.71±0.09 W m(-3), with internal resistance of 46.7±1.6 Ω and open circuit voltage of 727±7 mV. The species of Pseudomonas, Desulfovibrio, Bacillus, Enterococcus, Pelospora, Dehalobacter dominated the anodic community, while those of methylotrophs, Rhodobacter, Verrucomicrobiaceae, Geobacter, Flavobacterium, Thauera, Desulfovibrio and Aeromonas dominated the cathodic community. The proposed A/O bioelectrochemical reactor is a prototype for practical treatment of landfill leachate at affordable costs.
authors: 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: Guodong
authors: G
authors: Zhang
authors: Research Institute of Transition of Research-based Economics, Department of Environmental Economics, Shanxi University of Finance and Economics, Taiyuan 030006, China.
authors: Yan
authors: Y
authors: Jiao
authors: 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: Duu-Jong
authors: DJ
authors: Lee
mesh_terms: D001419:Bacteria / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology*; D000860:Hypoxia / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D009584:Nitrogen; D010100:Oxygen
keywords: Ammonium removal; Bacterial community; COD removal; Landfill leachate