title: Electricity generation and microbial community in microbial fuel cell using low-pH distillery wastewater at different external resistances.
abstract: Single chamber MFC (SMFC) consisted of two separator-electrode assemblies (SEA) using low-pH distillery wastewater (DW) was operated under continuous mode. The electricity generation and microbial community were analyzed according to the external resistance (Rext; 0.1, 0.5, 1, and 5 kΩ). The two SEAs exhibited different electricity generations, despite sharing the same anodic chamber. The SMFC showed the largest maximum power density (PDmax) of 3.7 W/m(3) (SEA 1) and 12.9 W/m(3) (SEA 2) at 5 kΩ. These results demonstrated that low-pH wastewater could be sufficiently used as fuels for electricity generation. Pyrosequencing analysis showed that microbial communities at the phylum level were significantly different according to the Rext. The communities of SEA 1 were slightly different from those of SEA 2. In both SEAs, Firmicutes (>45%) were the most dominant at 0.1 kΩ, while Firmicutes (>34%) and Caldiserica (>34%) were dominant at 5 kΩ. Caldiserica sp. might significantly contribute to electricity generation under low-pH and high-Rext.
authors.affiliation: MFC Research & Business Development Center, K-water Institute, Daejeon, Republic of Korea.
authors.forename: Hongsuck
authors.initials: H
authors.lastname: Kim
authors.affiliation: MFC Research & Business Development Center, K-water Institute, Daejeon, Republic of Korea.
authors.forename: Byunggoon
authors.initials: B
authors.lastname: Kim
authors.affiliation: MFC Research & Business Development Center, K-water Institute, Daejeon, Republic of Korea.
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Kim
authors.affiliation: School of Civil and Environmental Engineering, Pusan National University, Busan, Republic of Korea.
authors.forename: Taeho
authors.initials: T
authors.lastname: Lee
authors.affiliation: Department of Environmental Engineering, Silla University, Busan, Republic of Korea. Electronic address: yjcall@naver.com.
authors.forename: Jaecheul
authors.initials: J
authors.lastname: Yu
mesh_terms: D001419:Bacteria / Q000145:classification / Q000378:metabolism*; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D006863:Hydrogen-Ion Concentration; D059013:Microbial Consortia / Q000502:physiology*; D010802:Phylogeny; D062065:Wastewater / Q000737:chemistry*
chemical_list: D062065:Wastewater
keywords: Caldiserica; Distillery wastewater; Low-pH; Microbial fuel cell