title: Electricity generation and microbial community in a submerged-exchangeable microbial fuel cell system for low-strength domestic wastewater treatment.
abstract: A submerged type microbial fuel cell (MFC) system, which consisted of six readily exchangeable air-cathode MFCs, was evaluated for continuous treatment of low-strength domestic wastewater. When supplied with synthetic wastewater (COD 100 mg/L), the system showed increasing maximum power densities from 191 to 754 mW/m2 as COD loading rates increased (0.20-0.40 kg/m3/day). COD removal efficiencies decreased with increased COD loading rates but the effluent COD concentrations met the relevant effluent quality standard (CODMn 20 mg/L) at all conditions. The system was then operated with domestic wastewater (c.a. 100 mg COD/L) at 0.32 and 0.43 kg/m3/day. The system showed much lower power densities (116-149 mW/m2) at both loading rates, compared to synthetic wastewater. Anodic microbial communities were completely different when the wastewater type was changed. These results suggest that the newly developed MFC system could be applied to treat low-strength domestic wastewater without requiring any additional organic removal stage.
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan 609-735, Republic of Korea.
authors.forename: Jaecheul
authors.initials: J
authors.lastname: Yu
authors.forename: Jiyun
authors.initials: J
authors.lastname: Seon
authors.forename: Younghyun
authors.initials: Y
authors.lastname: Park
authors.forename: Sunja
authors.initials: S
authors.lastname: Cho
authors.forename: Taeho
authors.initials: T
authors.lastname: Lee
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D057919:Biological Oxygen Demand Analysis; D058645:Denaturing Gradient Gel Electrophoresis; D004560:Electricity; D005191:Family Characteristics; D005232:Fatty Acids, Volatile / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*
chemical_list: D005232:Fatty Acids, Volatile; D012336:RNA, Ribosomal, 16S