Microbial community composition is unaffected by anode potential

Xiuping Zhu, Matthew D. Yates, Marta C. Hatzell, Hari Ananda Rao, Pascal E. Saikaly, Bruce Ernest Logan

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

There is great controversy on how different set anode potentials affect the performance of a bioelectrochemical system (BES). It is often reported that more positive potentials improve acclimation and performance of exoelectrogenic biofilms, and alter microbial community structure, while in other studies relatively more negative potentials were needed to achieve higher current densities. To address this issue, the biomass, electroactivity, and community structure of anodic biofilms were examined over a wide range of set anode potentials (-0.25, -0.09, 0.21, 0.51, and 0.81 V vs a standard hydrogen electrode, SHE) in single-chamber microbial electrolysis cells. Maximum currents produced using a wastewater inoculum increased with anode potentials in the range of -0.25 to 0.21 V, but decreased at 0.51 and 0.81 V. The maximum currents were positively correlated with increasing biofilm biomass. Pyrosequencing indicated biofilm communities were all similar and dominated by bacteria most similar to Geobacter sulfurreducens. Differences in anode performance with various set potentials suggest that the exoelectrogenic communities self-regulate their exocellular electron transfer pathways to adapt to different anode potentials.

Original languageEnglish (US)
Pages (from-to)1352-1358
Number of pages7
JournalEnvironmental Science and Technology
Volume48
Issue number2
DOIs
StatePublished - Jan 21 2014

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community composition
biofilm
Biofilms
microbial community
Anodes
Electrodes
Chemical analysis
community structure
Biomass
Regenerative fuel cells
biomass
Geobacter
density current
acclimation
Electrolysis
electrokinesis
electrode
Acclimatization
hydrogen
Waste Water

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Medicine(all)

Cite this

Zhu, X., Yates, M. D., Hatzell, M. C., Ananda Rao, H., Saikaly, P. E., & Logan, B. E. (2014). Microbial community composition is unaffected by anode potential. Environmental Science and Technology, 48(2), 1352-1358. https://doi.org/10.1021/es404690q
Zhu, Xiuping ; Yates, Matthew D. ; Hatzell, Marta C. ; Ananda Rao, Hari ; Saikaly, Pascal E. ; Logan, Bruce Ernest. / Microbial community composition is unaffected by anode potential. In: Environmental Science and Technology. 2014 ; Vol. 48, No. 2. pp. 1352-1358.
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Zhu, X, Yates, MD, Hatzell, MC, Ananda Rao, H, Saikaly, PE & Logan, BE 2014, 'Microbial community composition is unaffected by anode potential', Environmental Science and Technology, vol. 48, no. 2, pp. 1352-1358. https://doi.org/10.1021/es404690q

Microbial community composition is unaffected by anode potential. / Zhu, Xiuping; Yates, Matthew D.; Hatzell, Marta C.; Ananda Rao, Hari; Saikaly, Pascal E.; Logan, Bruce Ernest.

In: Environmental Science and Technology, Vol. 48, No. 2, 21.01.2014, p. 1352-1358.

Research output: Contribution to journalArticle

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