Poly iron sulfate flocculant as an effective additive for improving the performance of microbial fuel cells

•Poly iron sulfate increases electric outputs from microbial fuel cells.•Poly iron sulfate increases the abundance of Geobacteraceae and Desulfuromonadaceae.•Poly iron sulfate suppresses the growth of methanogens. Laboratory microbial fuel cells were supplied with artificial wastewater and used to e...

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Bibliographic Details
Published in:Bioresource technology 2016-12, Vol.221, p.331-335
Main Authors: Miyahara, Morio, Sakamoto, Akihiro, Kouzuma, Atsushi, Watanabe, Kazuya
Format: Article
Language:English
Subjects:
16S rRNA gene
Bioelectric Energy Sources - microbiology
Deltaproteobacteria
Electrodes
Exoelectrogen
Flocculation
Iron - chemistry
Polarization analyses
Pyrosequencing
Real-time PCR
Sulfates - chemistry
Waste Disposal, Fluid - methods
Waste Water - chemistry
Waste Water - microbiology
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Summary:•Poly iron sulfate increases electric outputs from microbial fuel cells.•Poly iron sulfate increases the abundance of Geobacteraceae and Desulfuromonadaceae.•Poly iron sulfate suppresses the growth of methanogens. Laboratory microbial fuel cells were supplied with artificial wastewater and used to examine how supplementation with poly iron sulfate, an inorganic polymer flocculant widely used in wastewater-treatment plants, affects electricity generation and anode microbiomes. It is shown that poly iron sulfate substantially increases electric outputs from microbial fuel cells. Microbiological analyses show that iron and sulfate separately affect anode microbiomes, and the increase in power output is associated with the increases in bacteria affiliated with the families Geobacteraceae and/or Desulfuromonadaceae. We suggest that poly iron sulfate is an effective additive for increasing the electric output from microbial fuel cells. Other utilities of poly iron sulfate in microbial fuel cells are also discussed.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2016.09.046