Abstract
A thermophilic Bacillus strain NG80-2 growing within the temperature range of 45–73°C (optimum at 65°C) was isolated from a deep subterranean oil-reservoir in northern China. The strain was able to utilize crude oil and liquid paraffin as the sole carbon sources for growth, and the growth with crude oil was accompanied by the production of an unknown emulsifying agent. Further examination showed that NG80-2 degraded and utilized only long-chain (C15–C36) n-alkanes, but not short-chain (C8–C14) n-alkanes and those longer than C40. Based on phenotypic and phylogenic analyses, NG80-2 was identified as Geobacillus thermodenitrificans. The strain NG80-2 may be potentially used for oily-waste treatment at elevated temperature, a condition which greatly accelerates the biodegradation rate, and for microbial enhancing oil recovery process.
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Acknowledgements
This research was supported by the National 863 Program (2002AA226011) and funding from Tianjin Science and Technology Committee (033105811), China. We thank David Bastin for critical reading of the manuscript.
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Communicated by G. Antranikian
Lei Wang, Yun Tang and Shuo Wang contributed equally to this study.
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Wang, L., Tang, Y., Wang, S. et al. Isolation and characterization of a novel thermophilic Bacillus strain degrading long-chain n-alkanes. Extremophiles 10, 347–356 (2006). https://doi.org/10.1007/s00792-006-0505-4
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DOI: https://doi.org/10.1007/s00792-006-0505-4