Degradation of Dibenzothiophene by Sulfate-Reducing Bacteria Cultured in the Presence of Only Nitrogen Gas

概要

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To remove sulfur compounds in petroleum, we isolated sulfate-reducing bacteria that could degrade dibenzothiophene in the presence of only nitrogen gas. Among the 19 strains isolated, some could grow in the presence of 10% (v/v) kerosene and of which two strains were identified as Desulfomicrobium escambium and Desulfovibrio longreachii. Gas chromatography of the ethyl-acetate extract of bacterial cultures, in which 10% or more of the dibenzothiophene initially present was degraded, gave five unknown peaks as the presumable degradation products. Thus, desulfurization of dibenzothiophene could be carried out without oxygen or hydrogen in a pathway different from the anaerobic one already reported, in which biphenyl is detected as the main product.
公益社団法人日本生物工学会の論文
2001-01-25