title: Removal of sulfide and production of methane from carbon dioxide in microbial fuel cells-microbial electrolysis cell (MFCs-MEC) coupled system.
abstract: Removal of sulfide and production of methane from carbon dioxide in microbial electrolysis cells (MECs) at the applied voltage of 0.7 V was achieved using sulfide and organic compound as electron donors. The removal rate of sulfide was 72% and the Faraday efficiency of methane formation was 57% within 70 h of operation. Microbial fuel cell (MFCs) can be connected in series to supply power and drive the reaction in MECs. Removal of sulfide and production of methane from carbon dioxide in MFCs-MEC coupled system was achieved. The sulfide removal rates were 62.5, 60.4, and 57.7%, respectively, in the three anode compartments. Methane accumulated at a rate of 0.354 mL h(-1) L(-1) and the Faraday efficiency was 51%. Microbial characterization revealed that the biocathode of MEC was dominated by relatives of Methanobacterium palustre, Methanobrevibacter arboriphilus, and Methanocorpusculum parvum. This technology has a potential for wastewater treatments and biofuel production from carbon dioxide.
authors.affiliation: Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 South Renmin Road, 4th Section, Chengdu, Sichuan, 610041, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Min
authors.initials: M
authors.lastname: Su
authors.forename: Daping
authors.initials: D
authors.lastname: Li
mesh_terms: D001674:Bioelectric Energy Sources; D002245:Carbon Dioxide / Q000737:chemistry* / Q000378:metabolism; D004560:Electricity; D055664:Electrochemical Techniques; D004572:Electrolysis; D008697:Methane / Q000096:biosynthesis / Q000737:chemistry*; D017014:Methanobacterium / Q000378:metabolism; D041581:Methanobrevibacter / Q000378:metabolism; D017018:Methanomicrobiales / Q000378:metabolism; D013440:Sulfides / Q000737:chemistry* / Q000378:metabolism
chemical_list: D013440:Sulfides; D002245:Carbon Dioxide; D008697:Methane