Microbial reduction of SO2 as a means of byproduct recovery from regenerable,dry scrubbing processes for flue gas desulfurization |
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Authors: | Plumb Patrick Lee Kuoh H Sublette Kerry L |
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Institution: | 1.Center for Environmental Research, and Technology, University of Tulsa, 600 S. College Avenue, 74104, Tulsa, OK ; |
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Abstract: | A project is under way at the University of Tulsa to investigate the reduction of SO2 to H2S by sulfate reducing bacteria (SRB) in co-culture with mixed fermentative heterotrophs. We have previously demonstrated that
SO2 is completely reduced to H2S (contact times of 1–2 s) in cultures in which no redox poising agents were required and glucose served as the ultimate source
of carbon energy. We have proposed that such a microbial process could be coupled with a Claus reactor to recover elemental
sulfur as a byproduct of regenerable, dry scrubbing processes for flue gas desulfurization. The development of this process
concept has continued with a study of the use of molasses as a source of carbon and reduced nitrogen, identification of important
non-SRB heterotrophs in process cultures, and the identification of the end products of carbohydrate fermentation that serve
as carbon and energy sources for the SRB and identification of the end products of SRB metabolism. |
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Keywords: | Index Entries" target="_blank">Index Entries Desulfovibrio desulfuricans sulfur dioxide flue gas desulfurization sulfate-reducing bacteria hydrogen sulfide |
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