Sulfate reducing bacteria-based wastewater treatment system integrated with sulfide fuel cell for simultaneous wastewater treatment and electricity generation

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This study aimed to design a sulfate-reducing bacteria (SRB)-based wastewater treatment system (SWTS) integrated with a sulfide fuel cell (SFC) as an alternative to the energy-intensive aerobic wastewater treatment process. The result showed that the COD/sulfate ratio and hydraulic retention time (HRT) were two important parameters in a SWTS. The highest COD and sulfate removal efficiency rates were at a HRT of 4 h at a COD/sulfate ratio of 0.67, reaching 83 +/- 0.2% and 84 +/- 0.4% with sulfate removal rates of 4.087 +/- 32 mg SO42-/d, respectively. A microbial analysis revealed that the dominance of nine OTUs belonging to SRB closely affected the high sulfate removal efficiency in the SWTS. At the HRT of 8 h, voltage of 0.02 V and a power density level of 130 mW/m(2) were obtained with sulfide removal efficiency of 99 +/- 0.5%. These results overall demonstrate that SRB can serve as a green and effective route for wastewater treatment. (C) 2019 Published by Elsevier Ltd.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-10
Language
English
Article Type
Article
Citation

CHEMOSPHERE, v.233, pp.570 - 578

ISSN
0045-6535
DOI
10.1016/j.chemosphere.2019.05.206
URI
http://hdl.handle.net/10203/264378
Appears in Collection
CE-Journal Papers(저널논문)
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