n-アルカン中のジベンゾチオフェンの微生物による選択的分解

概要

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Dibenzothiophene (DBT) derivatives in oil are regarded as being difficult to remove. Aerobic DBT-degrading bacteria were screened from soil, sediment and surficial river and sea water. One strain possessing high degradation ability was named ARK. In "oil"(hexadecane containing DBT), as the "oil"-medium ratio increased, the efficiency of DBT degradation decreased. When the degrading bacteria were fixed on a support, however, the efficiency increased 3-or 4-fold and DBT could be degraded in a high "oil"-medium ratio. The ARK strain has the ability to selectively degrade petroleum hydrocarbons. Long chain aliphatic and alicyclic hydrocarbons such as hexadecane and decaline could not be degraded, while polyaromatic hydrocarbons could be degraded by the strain regardless of having a sulfur element. Moreover, 4-methyl DBT and 4.6-dimethyl DBT, which are especially difficult to remove by physical and chemical methods, could also be degraded, though at a rate 1/3-1/9 more slowly than DBT.
社団法人日本生物工学会の論文
1995-11-25