Thermophilic biodesulfurization of dibenzothiophene and its derivatives by Mycobacterium phlei WU-F1

Toshiki Furuya, Kohtaro Kirimura, Kuniki Kino, Shoji Usami

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Dibenzothiophene (DBT) derivatives can be detected in diesel oil following hydrodesulfurization treatment, and they are widely recognized as target compounds for more efficient desulfurization. The moderately thermophilic bacterium Mycobacterium phlei WU-F1 was isolated for its ability to grow at 50°C in a medium with DBT as the sole source of sulfur. At 50°C, resting cells of WU-F1 degraded 0.81 mM DBT within only 90 min to produce 2-hydroxybiphenyl as a desulfurized metabolite through the selective cleavage of carbon-sulfur bonds, and also degraded 0.81 mM of derivatives such as 2,8-dimethylDBT, 4,6-dimethylDBT and 3,4-benzoDBT within 8 h. In addition, the resting cells exhibited high DBT-desulfurizing ability over a wide temperature range from 20 to 50°C. Because M. phlei WU-F1 possesses higher desulfurizing ability toward DBT and the derivatives over a wider temperature range than any other microorganisms previously reported, it may have useful practical applications for biodesulfurization.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalFEMS Microbiology Letters
Volume204
Issue number1
DOIs
Publication statusPublished - 2001 Oct 16

Keywords

  • Carbon-sulfur bond cleavage
  • Desulfurization
  • Dibenzothiophene
  • Mycobacterium phlei
  • Petroleum

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics

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