Isolation and characterization of a novel electricity-producing yeast, Candida sp. IR11

Yun Yeong Lee, Tae Gwan Kim, Kyung Suk Cho

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A novel iron-reducing yeast, Candida sp. IR11, was isolated from an anodic biofilm in a MFC reactor fed glucose as a feedstock. 200-250mV 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±1.52mWm-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.

Original languageEnglish
Pages (from-to)556-563
Number of pages8
JournalBioresource Technology
Volume192
DOIs
StatePublished - 1 Sep 2015

Keywords

  • Candida sp.
  • Electricity-producing yeast
  • Iron reduction
  • Microbial fuel cells

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