Anode microbial communities produced by changing from microbial fuel cell to microbial electrolysis cell operation using two different wastewaters

Patrick D. Kiely, Roland Cusick, Douglas F. Call, Priscilla A. Selembo, John M. Regan, Bruce E. Logan

Research output: Contribution to journalArticle

Abstract

Conditions in microbial fuel cells (MFCs) differ from those in microbial electrolysis cells (MECs) due to the intrusion of oxygen through the cathode and the release of H2 gas into solution. Based on 16S rRNA gene clone libraries, anode communities in reactors fed acetic acid decreased in species richness and diversity, and increased in numbers of Geobacter sulfurreducens, when reactors were shifted from MFCs to MECs. With a complex source of organic matter (potato wastewater), the proportion of Geobacteraceae remained constant when MFCs were converted into MECs, but the percentage of clones belonging to G. sulfurreducens decreased and the percentage of G. metallireducens clones increased. A dairy manure wastewater-fed MFC produced little power, and had more diverse microbial communities, but did not generate current in an MEC. These results show changes in Geobacter species in response to the MEC environment and that higher species diversity is not correlated with current.

Original languageEnglish (US)
Pages (from-to)388-394
Number of pages7
JournalBioresource Technology
Volume102
Issue number1
DOIs
StatePublished - Jan 2011
Externally publishedYes

Fingerprint

electrokinesis
Regenerative fuel cells
fuel cell
Microbial fuel cells
clone
wastewater
Wastewater
Sex Differentiation
microbial community
species diversity
Anodes
Autopsy
potato
acetic acid
manure
species richness
organic matter
oxygen
gene
gas

Keywords

  • Bioelectricity
  • Exoelectrogen
  • Microbial fuel cell

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

Anode microbial communities produced by changing from microbial fuel cell to microbial electrolysis cell operation using two different wastewaters. / Kiely, Patrick D.; Cusick, Roland; Call, Douglas F.; Selembo, Priscilla A.; Regan, John M.; Logan, Bruce E.

In: Bioresource Technology, Vol. 102, No. 1, 01.2011, p. 388-394.

Research output: Contribution to journalArticle

Kiely, Patrick D.; Cusick, Roland; Call, Douglas F.; Selembo, Priscilla A.; Regan, John M.; Logan, Bruce E. / Anode microbial communities produced by changing from microbial fuel cell to microbial electrolysis cell operation using two different wastewaters.

In: Bioresource Technology, Vol. 102, No. 1, 01.2011, p. 388-394.

Research output: Contribution to journalArticle

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