Open Access Library Journal

Volume 4, Issue 10 (October 2017)

ISSN Print: 2333-9705   ISSN Online: 2333-9721

Google-based Impact Factor: 1.18  Citations  

Isolation, Identification and Degradation Characteristics of Oil Degrading Bacterial Strain

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DOI: 10.4236/oalib.1104016    1,109 Downloads   3,254 Views  Citations

ABSTRACT

Objective: The aim of study is to obtain a strain which can effectively degrade oil. Methods: By enrichment, domestication and separation of culture from the sample which comes from Qianjiang Guanghua Oilfield, the pure culture (G-40) was selected from the medium supplemented with oil as the sole source of carbon. The G-40 was preliminarily identified and classified by morphological observation, physiological and biochemical determination and sequence analyses of 16S rDNA. Effects of temperature, pH, oil concentration, salt concentration, inoculation amount, N and P source on the degradation of the oil were studied by single factor test. Meanwhile, the effects of temperature, pH, oil concentration and salt concentration were optimized by orthogonal design. Result: G-40 was isolated and identified as Brevibacillus laterosporus. The orthogonal design showed that the degradation rate of oil could reach 20.81%, 24.34% and 31.15% at 10 d, 20 d and 40 d under the optimal conditions which was 35℃, initial pH 7.3, oil concentration 0.6%, salt concentration 0.5%, inoculum amount 8%, the optimal N and P was (NH4)2SO4 and K2HPO4. Conclusion: This study provides microbial resources for bioremediation of petroleum contaminated soil.

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Zhan, Y. , Tao, X. , He, S. , Song, S. , Xing, J. , Li, F. , Jiang, T. and Ma, L. (2017) Isolation, Identification and Degradation Characteristics of Oil Degrading Bacterial Strain. Open Access Library Journal, 4, 1-12. doi: 10.4236/oalib.1104016.

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