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Applied and Environmental Microbiology, January 2005, p. 276-281, Vol. 71, No. 1
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.1.276-281.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Microbial Desulfurization of Gasoline in a Mycobacterium goodii X7B Immobilized-Cell System

Fuli Li,1 Ping Xu,1* Jinhui Feng,1 Ling Meng,1 Yuan Zheng,1 Lailong Luo,2 and Cuiqing Ma1

State Key Laboratory of Microbial Technology, Shandong University, Jinan,1 Petrochina Karamay Petrochemical Corporation, Karamay, People's Republic of China2

Received 24 May 2004/ Accepted 24 August 2004

Mycobacterium goodii X7B, which had been primarily isolated as a bacterial strain capable of desulfurizing dibenzothiophene to produce 2-hydroxybiphenyl via the 4S pathway, was also found to desulfurize benzothiophene. The desulfurization product was identified as o-hydroxystyrene by gas chromatography (GC)-mass spectrometry analysis. This strain appeared to have the ability to remove organic sulfur from a broad range of sulfur species in gasoline. When Dushanzi straight-run gasoline (DSRG227) containing various organic sulfur compounds was treated with immobilized cells of strain X7B for 24 h, the total sulfur content significantly decreased, from 227 to 71 ppm at 40°C. GC flame ionization detection and GC atomic emission detection analysis were used to qualitatively evaluate the effects of M. goodii X7B treatment on the contents of gasoline. In addition, when immobilized cells were incubated at 40°C with DSRG275, the sulfur content decreased from 275 to 54 ppm in two consecutive reactions. With this excellent efficiency, strain X7B is considered a good potential candidate for industrial applications for the biodesulfurization of gasoline.

* Corresponding author. Mailing address: State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, People's Republic of China. Phone: 86-531-8564003. Fax: 86-531-8567250. E-mail: pingxu{at}sdu.edu.cn.

Applied and Environmental Microbiology, January 2005, p. 276-281, Vol. 71, No. 1
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.1.276-281.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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