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Sulfur - reducing bacteria are a part of normal microflora of natural environment. Their main function is supporting
of reductive stage of sulfur cycle by hydrogen sulfide production in the process of dissimilative sulfur-reduction. At the
same time these bacteria completely oxidize organic compounds with CO2 and H2O formation. It was shown that they are able to generate electric current in the two chamber microbial-anode fuel cell (MAFC) by interaction between these two processes. Microbial-anode fuel cell on the basis of sulfur- and ferric iron-reducing Desulfuromonas acetoxidans bacteria has been constructed. It has been shown that the amount of electricity generation by investigated bacteria is influenced by the concentrations of carbon source (lactate) and ferric iron chloride. The maximal obtained electric current and potential difference between electrodes equaled respectively 0.28-0.29 mA and 0.19-0.2 V per 0.3 l of bacterial suspension with 0.4 g/l of initial biomass that was grown under the influence of 0.45 mM of FeCl3 and 3 g/l of sodium lactate as primal carbon source. It has also been shown that these bacteria are resistant to different concentrations of silver ions.
Oresta M. Vasyliv,Oleksandr I. Bilyy,Yaroslav P. Ferensovych, andSvitlana O. Hnatush
"Electric current generation by sulfur-reducing bacteria in microbial-anode fuel cell", Proc. SPIE 8472, Reliability of Photovoltaic Cells, Modules, Components, and Systems V, 84720Z (16 October 2012); https://doi.org/10.1117/12.925211
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Oresta M. Vasyliv, Oleksandr I. Bilyy, Yaroslav P. Ferensovych, Svitlana O. Hnatush, "Electric current generation by sulfur-reducing bacteria in microbial-anode fuel cell," Proc. SPIE 8472, Reliability of Photovoltaic Cells, Modules, Components, and Systems V, 84720Z (16 October 2012); https://doi.org/10.1117/12.925211