Electricity generation by Rhodopseudomonas palustris DX-1

Defeng Xing, Yi Zuo, Shaoan Cheng, John Ragan, Bruce Ernest Logan

Research output: Contribution to journalArticle

232 Citations (Scopus)

Abstract

Bacteria able to generate electricity in microbial fuel cells (MFCs) are of great interest, but there are few strains capable of high power production in these systems. Here we report that the phototrophic purple nonsulfur bacterium Rhodopseudomonas palustris DX-1, isolated from an MFC, produced electricity at higher power densities (2720 ± 60 mW/m2) than mixed cultures in the same device. While Rhodopseudomonas species are known for their ability to generate hydrogen, they have not previously been shown to generate power in an MFC, and current was generated without the need for light or hydrogen production. Strain DX-1 utilizes a wide variety of substrates (volatile acids, yeast extract, and thiosulfate) for power production in different metabolic modes, making it highly useful for studying power generation in MFCs and generating power from a range of simple and complex sources of organic matter. These results demonstrate that a phototrophic purple nonsulfur bacterium can efficiently generate electricity by direct electron transfer in MFCs, providing another model microorganism for MFC investigations.

Original languageEnglish (US)
Pages (from-to)4146-4151
Number of pages6
JournalEnvironmental Science and Technology
Volume42
Issue number11
DOIs
StatePublished - Jun 1 2008

Fingerprint

Microbial fuel cells
electricity generation
fuel cell
Electricity
electricity
bacterium
hydrogen
Thiosulfates
thiosulfate
Hydrogen production
power generation
Microorganisms
Yeast
Biological materials
Power generation
yeast
Hydrogen
Bacteria
microorganism
organic matter

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Xing, Defeng ; Zuo, Yi ; Cheng, Shaoan ; Ragan, John ; Logan, Bruce Ernest. / Electricity generation by Rhodopseudomonas palustris DX-1. In: Environmental Science and Technology. 2008 ; Vol. 42, No. 11. pp. 4146-4151.
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Electricity generation by Rhodopseudomonas palustris DX-1. / Xing, Defeng; Zuo, Yi; Cheng, Shaoan; Ragan, John; Logan, Bruce Ernest.

In: Environmental Science and Technology, Vol. 42, No. 11, 01.06.2008, p. 4146-4151.

Research output: Contribution to journalArticle

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