title: Performance of microbial fuel cell coupled constructed wetland system for decolorization of azo dye and bioelectricity generation.
abstract: A microbial fuel cell coupled constructed wetland (planted with Ipomoea aquatica) system (planted CW-MFC) was used for azo dye decolorization. Electricity was simultaneously produced during the co-metabolism process of glucose and azo dye. A non-planted and an open-circuit system were established as reference to study the roles of plants and electrodes in azo dye decolorization and electricity production processes, respectively. The results indicated that plants grown in cathode enhanced the cathode potential and slightly promoted dye decolorization efficiency. The electrodes promoted the dye decolorization efficiency in the anode. The planted CW-MFC system achieved the highest decolorization rate of about 91.24% and a voltage output of about 610 mV. The connection of external circuit promoted the growth of electrogenic bacteria Geobacter sulfurreducens and Beta Proteobacteria, and inhibited the growth of Archaea in anode.
authors.affiliation: School of Energy and Environment, Southeast University, Nanjing 210096, China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Fang
authors.forename: Hai-Liang
authors.initials: HL
authors.lastname: Song
authors.forename: Ning
authors.initials: N
authors.lastname: Cang
authors.forename: Xian-Ning
authors.initials: XN
authors.lastname: Li
mesh_terms: D001105:Archaea / Q000378:metabolism; D001391:Azo Compounds / Q000302:isolation & purification*; D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D056804:Biofuels / Q000032:analysis* / Q000382:microbiology; D057919:Biological Oxygen Demand Analysis; D003116:Color; D004396:Coloring Agents / Q000302:isolation & purification*; D004560:Electricity; D004566:Electrodes; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology; D018508:Water Purification; D053833:Wetlands
chemical_list: D001391:Azo Compounds; D056804:Biofuels; D004396:Coloring Agents; D010100:Oxygen; D062065:Wastewater
keywords: Azo dye; Bioelectricity generation; Constructed wetland; Decolorization; Microbial fuel cell