Abstract
Desulfurization of dibenzothiophene (DBT) by whole cells of Rhodococcus erythropolis H-2 proceeded efficiently in the presence of two model petroleums-kerosene or a mixture of hydrocarbons. The reaction rate was enhanced by the addition of these model petroleums at 40 and 20%, respectively. The optimal temperatures for the degradation of DBT and the formation of 2-hydroxybiphenyl (2-HBP), the DBT desulfurization product, were 45°C and 40°C, respectively, which were higher than the upper temperature limit (37°C) for growth with DBT as a sole source of sulfur. These results are evaluated from the viewpoint of practical microbial desulfurization.
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