Spatial distribution of bacterial communities on volumetric and planar anodes in single-chamber air-cathode microbial fuel cells

Ignacio T. Vargas, Istvan Albert, John Ragan

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Pyrosequencing was used to characterize bacterial communities in air-cathode microbial fuel cells across a volumetric (graphite fiber brush) and a planar (carbon cloth) anode, where different physical and chemical gradients would be expected associated with the distance between anode location and the air cathode. As expected, the stable operational voltage and the coulombic efficiency (CE) were higher for the volumetric anode than the planar anode (0.57V and CE=22% vs. 0.51V and CE=12%). The genus Geobacter was the only known exoelectrogen among the observed dominant groups, comprising 57±4% of recovered sequences for the brush and 27±5% for the carbon-cloth anode. While the bacterial communities differed between the two anode materials, results showed that Geobacter spp. and other dominant bacterial groups were homogenously distributed across both planar and volumetric anodes. This lends support to previous community analysis interpretations based on a single biofilm sampling location in these systems.

Original languageEnglish (US)
Pages (from-to)3059-3062
Number of pages4
JournalBiotechnology and Bioengineering
Volume110
Issue number11
DOIs
StatePublished - Nov 1 2013

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Fingerprint Dive into the research topics of 'Spatial distribution of bacterial communities on volumetric and planar anodes in single-chamber air-cathode microbial fuel cells'. Together they form a unique fingerprint.

  • Cite this