Abstract
A microbial consortium (named W4) capable of aerobic biodegradation of solid phenanthrene as the sole source of carbon and energy was isolated by selective enrichment from petroleum-contaminated soil in the Henan oilfield, China. The strains of the consortium were identified as Sphingomonas cloacae, Rhizobium sp., Pseudomonas aeruginosa and Achromobacter xylosoxidans respectively by means of genetic methods. The major metabolites of phenanthrene were analyzed by gas chromatography-mass spectrometry (GC-MS). The biodegradation percentage of solid phenanthrene at 200 mg/L in liquid medium after 7 days of growth was greater than 99%. The degradation of phenanthrene was compared between individual predominant strains and the microbial consortium in different treatment processes. The microbial consortium showed a significant improvement of phenanthrene degradation rates in either static or shaking culture. The degradation percentage of phenanthrene by the consortium W4 decreased to some degree when C16 coexisted, however it was hardly affected by C30. Furthermore, the ability of consortium W4 to remediate oil sludge from the Dagang oil refinery was studied by composting; and it was found that the consortium W4 could obviously remove polycyclic aromatic hydrocarbons (PAHs) and paraffinic hydrocarbons. All the results indicated that the microbial consortium W4 had a promising application in bioremediation of oil-contaminated environments and could be potentially used in microbial enhanced oil recovery (MEOR).
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Wang Jing was born in 1954. She received her PhD degree from Nagoya University, Japan, in 1997, then she had engaged in her molecular biological research as a post-doctoral fellowship of the JSPS (Japan Society for the Promotion of Science) from 1998 to 2000. She now works as an associate professor at the School of Chemical Science & Engineering in China University of Petroleum (Beijing). Her present academic interests include biodegradation of polluted environments and microbial enhanced oil recovery.
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Wang, J., Xu, H. & Guo, S. Isolation and characteristics of a microbial consortium for effectively degrading phenanthrene. Pet. Sci. 4, 68–75 (2007). https://doi.org/10.1007/s12182-007-0012-y
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DOI: https://doi.org/10.1007/s12182-007-0012-y