Synergistic Effect of Yeast-Bacterial Co-Culture on Bioremediation of Oil-Contaminated Soil |
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| Authors: | Chengdong Zhang Jianchao Qi Yiping Cao |
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| Institution: | 1. College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, China;2. Southern California Coastal Water Research Project, Costa Mesa, California, USA |
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| Abstract: | The effects of various treatments, including biostimulation, bioaugmentation with bacterial consortium, yeast, and yeast-bacterial co-culture, on oil biodegradation were systematically compared. Synergistic effects were observed on the removal of total petroleum hydrocarbon and polycyclic aromatic hydrocarbons via the amendment of co-culture, with a 48-day degradation of 56% for total petroleum hydrocarbon and 32% for polycyclic aromatic hydrocarbons, respectively. Yeast played an important role in the removal of polycyclic aromatic hydrocarbons with 4–6 rings. The synergistic effect of yeast-bacteria was further evidenced by the increase of biomass and enzyme activities in soil. In comparison with the bacterial community, the yeast community was more sensitive to the inoculated cultures, which was indexed by the changes of diversity, abundance, and evenness in polymerase chain reaction–denaturing gradient gel electrophoresis (PCR-DGGE) analysis. |
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| Keywords: | bacteria bioremediation oil contamination PAHs synergistic effect yeast |
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