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Simultaneous removal of sulfide and organics with vanadium(V) reduction in microbial fuel cells
Author(s) -
Zhang Baogang,
Zhao Huazhang,
Shi Chunhong,
Zhou Shungui,
Ni Jinren
Publication year - 2009
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.2244
Subject(s) - microbial fuel cell , sulfide , anode , cathode , vanadium , electron acceptor , chemistry , wastewater , pulp and paper industry , nuclear chemistry , inorganic chemistry , waste management , environmental chemistry , environmental science , environmental engineering , electrode , organic chemistry , engineering
BACKGROUND: Sulfide‐containing wastewater (also containing organics) and vanadium(V)‐containing wastewater exist widely and can be treated in microbial fuel cells (MFCs) based on their chemical conditions. A novel process has been investigated using MFC technologies by employing sulfide, organics and V(V) as electron donors and acceptor, respectively. RESULTS: Electrons produced by oxidation of sulfide and organics in the anode compartment were transferred to the anode surface, then flowed to the cathode through an external circuit, where they were consumed to reduce V(V). Sulfide and total organics removal approached 84.7 ± 2.8% and 20.7 ± 2.1%, with a V(V) reduction rate of 25.3 ± 1.1%. The maximum power output obtained was 572.4 ± 18.2 mW m −2 . The effects of the microbes on electricity generation as well as the products of sulfide oxidation and V(V) reduction were also evaluated and analyzed. CONCLUSION: This process achieves both sulfide and V(V) removal with electricity generation simultaneously, providing an economical route for treating these kinds of wastewaters. Copyright © 2009 Society of Chemical Industry