Degradation of dibenzothiophene by sulfate-reducing bacteria cultured in the presence of only nitrogen gas

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 e...

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Bibliographic Details
Published in:Journal of bioscience and bioengineering 2001, Vol.91 (1), p.91-93
Main Authors: Onodera-Yamada, Keiko, Morimoto, Masakazu, Tani, Yoshiki
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
desulfurization
dibenzothiophene degradation
Fundamental and applied biological sciences. Psychology
Mission oriented research
Physiology and metabolism
sulfate-reducing bacteria
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Summary: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.
ISSN:1389-1723
1347-4421
DOI:10.1016/S1389-1723(01)80119-5