Strain capable of degradation of benzo[a]pyrene

Abstract

The invention discloses a strain capable of degradation of benzo[a]pyrene, and belongs to the technical field of biodegradation treatment. The benzo[a]pyrene degradation strain is identified as Achromobacter sp., and the strain preservation number is CGMCC3684. The strain is prepared into the bacterium suspension with the bacterium content of 1.25*10<8> CFU / ml. With the strain of the present invention, the degradation removal rates of the materials with the initial benzo[a]pyrene concentrations of 0.11 mg / L, 0.34 mg / L, 0.71 mg / L, and 1.19 mg / L are respectively 74.35%, 84.66%, 78.91% and 68.33%.

Description

technical field [0001] The invention belongs to the technical field of biodegradation treatment of polluted soil and water, and particularly relates to a bacterial strain capable of degrading benzo[a]pyrene. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are a class of toxic organic pollutants containing two or more benzene rings, which have strong carcinogenic, teratogenic and mutagenic effects. PAHs can cause great harm to the ecological environment and human health through bioaccumulation and food chain transmission, which has attracted great attention from environmental scientists in various countries. As early as the 1980s, the U.S. Environmental Protection Agency identified 16 unbranched PAHs as priority pollutants in the environment, and my country also included PAHs in the blacklist of environmental pollution. Biodegradation is one of the most effective means to restore PAHs polluted environment. [0003] In ...

AI Technical Summary

Problems solved by technology

However, the lack of efficient PAH-degrading bacteria restricts the further development and application of PAH-contaminated soil bioremediation technology.

Existing studies on the degradation of PAHs by microorganisms generally focus on the screening, isolation and purification of microorganisms that degrade low-molecular-weight PAHs, but there are few reports on microorganisms that efficiently degrade high-molecular-weight PAHs