The invention belongs to biotechnology and specifically discloses pentachlorophenol degrading bacterium as well as a production method and application thereof. The pentachlorophenol degrading bacterium is used for degrading a pentachlorophenol pollutant by utilizing microorganisms, and is suitable for bioremediation of pentachlorophenol-polluted water or composite polluted water of chlorophenol compounds. The degrading bacterium is citrobacter which was preserved in China General Microbiological Culture Collection Center (CGMCC) on 24th, June, 2013, with the preservation number of CGMCC No.7817 and the preservation unit address of Institute of Microbiology of Chinese Academy of Sciences, #3, No.1 Institution, West Beichen Road, Chaoyang District, Beijing. When the pentachlorophenol is the only carbon source, the bacteria can be used for degrading the pentachlorophenol well, so that a degradation rate to 100mg/L pentachlorophenol within 72 hours can reach 90%. Compared with other bacterial strains, the strain has efficient PCP (Pentachlorophenol) degradation ability, good environment adaptive capacity and performance tolerance of various chlorophenols. Besides, the bacteria have good application prospect in bioremediation of pentachlorophenol-polluted water or composite polluted water of chlorophenol compounds.
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