title: Isolation and characterization of a novel electricity-producing yeast, Candida sp. IR11.
abstract: A novel iron-reducing yeast, Candida sp. IR11, was isolated from an anodic biofilm in a MFC reactor fed glucose as a feedstock. 200-250 mV of voltage was produced in the air-cathode MFC inoculated with a pure culture of the strain IR11 where glucose was supplied as a feedstock. When the strain IR11 was inoculated into a conventional MFC treating rejected wastewater from an upflow anaerobic sludge blanket, maximum power density and coulombic efficiency were enhanced from 15.2 ± 0.36 to 20.6 ± 1.52 mW m(-2) and from 14.4 ± 0.45% to 21.9 ± 0.71%, respectively. In addition, the inoculation with IR11 improved COD removal from 79.1 ± 1.53% to 91.3 ± 5.29%. The quantitative PCR results showed that the strain IR11 successfully attached the anodic biofilm of the MFC reactors. These results indicate that Candida sp. IR11 is a promising biocatalyst for the enhancement of MFC performance.
authors.affiliation: Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea.
authors.forename: Yun-Yeong
authors.initials: YY
authors.lastname: Lee
authors.affiliation: Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea.
authors.forename: Tae Gwan
authors.initials: TG
authors.lastname: Kim
authors.affiliation: Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea. Electronic address: kscho@ewha.ac.kr.
authors.forename: Kyung-Suk
authors.initials: KS
authors.lastname: Cho
mesh_terms: D001674:Bioelectric Energy Sources / Q000382:microbiology*; D019149:Bioreactors / Q000382:microbiology*; D002175:Candida / Q000145:classification / Q000302:isolation & purification* / Q000502:physiology*; D004566:Electrodes; D004735:Energy Transfer / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005947:Glucose / Q000378:metabolism*
chemical_list: D005947:Glucose
keywords: Candida sp.; Electricity-producing yeast; Iron reduction; Microbial fuel cells