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| Enrichment and degradation characteristics of an indigenous benzo[a]pyrene-degrading bacterial consortium |
| Received:June 23, 2020 |
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| KeyWord:polycyclic aromatic hydrocarbons;benzo[a]pyrene;microbial degradation;contaminated soil |
| Author Name | Affiliation | E-mail | | GUO Guang | College of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China | | | TIAN Fang | College of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China | | | DING Ke-qiang | College of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China | | | YANG Feng | College of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China | | | XU Jin | College of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China | | | LI Xiao-hua | Rural Energy & Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | lixiaohua8008@126.com | | LIU Chong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | |
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| Abstract: |
| To obtain microorganisms for the bioremediation of PAH-contaminated soil, a bacterial consortium capable of degrading benzo[a] pyrene(BaP)was enriched from oil-contaminated soil. The optimal degradation conditions and the community structure were studied. The bacterial consortium could degrade 33.34% BaP(30 mg·L-1)after 15 days of treatment. High-throughput sequencing results showed that the bacterial consortium consisted of Bacillus, Zobellella, Gordonia, and Rheinheimera. Bacillus was the primary decomposing bacterial genera present. The results showed that the optimum degradation conditions were 1% salinity, supplementation with 80 mg·L-1 yeast extract, and pH 7.0. The bacterial consortium could degrade pyrene, phenanthrene, and fluoranthene. Fluoranthene was the substrate with the highest degradability(99%). The results showed that the bacterial consortium have considerable potential for practical application for PAH biodegradation. |
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