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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 2010; 38(3): 335-339

디젤 분해 세균 Gordonia sp. SD8 분리 및 특성

Isolation and Characterization of a Diesel-Degrading Bacterium, Gordonia sp. SD8

Sun-Hwa Hong , Ji-Young Kim and Kyung-Suk Cho

Department of Environmental Science and Engineering, Ewha Womans University, 1Department of Environmental Science and Engineering, Ewha Womans University, 2Department of Environmental Science and Engineering, Ewha Womans University

Abstract

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A diesel-degrading bacterium, Gordonia sp. SD8, was isolated from soil contaminated with petroleum, and its diesel degradation was characterized in a soil as well as a liquid culture system. SD8 could grow in the mineral salt medium supplemented with diesel as a sole carbon and energy source. The maximum specific growth rate ($0.67{pm}0.05;d^{-1}$) and diesel degradation rate ($1,727{pm}145$ mg-TPH $L^{-1};d^{-1}$) of SD8 showed at 20,000 mg-TPH $L^{-1}$ and $30^{circ}C$, and then this bacterium could degrade high strength of diesel of 40,000 mg-TPH $L^{-1}$. The residual diesel concentration in the inoculated soil with SD8 was 3,724 mg-TPH kg-dry $soil^{-1}$ after 17 days, whereas the diesel concentration in the non-inoculated soil was $8,150{pm}755$ mg-TPH kg-dry $soil^{-1}$. These results indicate that Gordonia sp. SD8 can serve as a promising microbial resource for the bioremediaion of contaminated soil with petroleum hydrocarbons including diesel.

Keywords: Bioremediation, Gordonia sp., diesel, soil contamination

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