Functionally stable and phylogenetically diverse microbial enrichments from microbial fuel cells during wastewater treatment.

PloS One
Shun'ichi IshiiOrianna Bretschger

Abstract

Microbial fuel cells (MFCs) are devices that exploit microorganisms as biocatalysts to recover energy from organic matter in the form of electricity. One of the goals of MFC research is to develop the technology for cost-effective wastewater treatment. However, before practical MFC applications are implemented it is important to gain fundamental knowledge about long-term system performance, reproducibility, and the formation and maintenance of functionally-stable microbial communities. Here we report findings from a MFC operated for over 300 days using only primary clarifier effluent collected from a municipal wastewater treatment plant as the microbial resource and substrate. The system was operated in a repeat-batch mode, where the reactor solution was replaced once every two weeks with new primary effluent that consisted of different microbial and chemical compositions with every batch exchange. The turbidity of the primary clarifier effluent solution notably decreased, and 97% of biological oxygen demand (BOD) was removed after an 8-13 day residence time for each batch cycle. On average, the limiting current density was 1000 mA/m(2), the maximum power density was 13 mW/m(2), and coulombic efficiency was 25%. Interestingly, ...Continue Reading

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Citations

Sep 5, 2013·Proceedings of the National Academy of Sciences of the United States of America·Shino SuzukiKenneth H Nealson
Sep 25, 2012·Environmental Science & Technology·Li XiaoZhen He
Mar 20, 2013·Journal of Environmental Management·Yinghua FengW F Harper
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Jan 27, 2018·Journal of Bioscience and Bioengineering·Kei SuzukiHiroyuki Futamata
Jun 8, 2021·Environmental Science & Technology·Daniel Dzofou NgoumelahJörg Kretzschmar

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Datasets Mentioned

BETA
HQ688300
HQ688420
HQ688421

Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

CLC genomics work bench
BLAST
Analytic Rarefaction
Estimate S
JCVI

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