Abstract
AbstractA dibenzothiophene (DBT)‐desulfurizing bacteria strain was isolated from oil‐contaminated soils and identified as Rhodococcus erythropolis NCC‐1. Strain NCC‐1 was found to convert DBT to hydroxybiphenyl (2‐HBP) via the 4S pathway and also be able to use organic sulfur compounds other than DBT as a sole sulfur source. The strain could desulfurize 4,6‐dimethyldibenzothiophene (4,6‐DMDBT), which is one of the most recalcitrant dibenzothiophene derivatives to hydrodesulfurization. When two type of oils, a model oil [n‐hexadecane (n‐C16) containing DBT] and a hydrodesulfurized diesel oil with various organic sulfur compounds, were treated with Rhodococcus erythropolis NCC‐1 cells, the total sulfur content significantly decreased, from 150 to 20 mg/L for n‐C16 and from 554 to 274 mg/L for diesel oil. The newly isolated strain NCC‐1 is considered to have good potential for application in the biodesulfurization of fossil fuels.
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