Rhizobium capable of degrading polychlorinated biphenyl and application thereof

Abstract

The invention belongs to the field of microorganism and relates to rhizobium capable of degrading polychlorinated biphenyl and an application thereof. Sinorhizobium melilon SL1 is preserved in China General Microbiological Culture Collection Center, CGMCC on December, 10th, 2012. The collection number is CGMCC No.6962. The strain can grow by the utilization of polychlorinated biphenyl as the sole carbon source and energy, and has good capability of degrading both 2,4,4'-TCB and 3,3',4,4'-PCB under the condition of a shake flask in a laboratory. Degradation conditions are optimized, and the polychlorinated biphenyl degrading effect of the strain is further raised. The strain provides foundations for biodegradation of polychlorinated biphenyl and water body pollution restoration.

Description

technical field

[0001] In the field of microorganisms, the invention relates to a rhizobium strain capable of degrading polychlorinated biphenyls and its application. Background technique

[0002] Polychlorinated biphenyls (PCBs) are a class of artificially synthesized organic compounds with strong chemical inertness and biorefractory biodegradability. Soil is the main destination for them in the environment. Because many PCBs can accumulate in organisms and have the "three causes" effects of carcinogenicity, teratogenicity, and mutagenicity, they have been listed as one of the first 12 persistent organic pollutants (POPs) that need to be reduced and controlled. How to remediate PCBs-contaminated soil has become a hot spot of concern.

[0003] At present, safe and economical bioremediation, especially microbial remediation measures, has become a very promising PCBs contamination remediation technology. Since Ahmed and Focht screened out two strains of Achromobacter sp. tha...

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