Effective Biodegradation Of Polycyclic Aromatic Hydrocarbons (PAHs) And Population Diversity Of Bacteria In The Contaminated Soil.

The microbial remediation of long-term sewage irrigated soil (PAHs,1.34 mg kg-1) in Shen-fu irrigation area was carried out into laboratory.The effective PAHs-degrading strains were isolated by enrichment culture from this oil-contaminated soil,which are capable of growing on pyrene and phenanthrene as sole carbon and energy source. The strains were identified as Ochrobactrum,Pseudomonas,Gordona, Bacillus and Mycobacterium respectively according to the results of morphology analysis, physio-biochemical tests. A laboratory simulatiom test was conducted to study the microbial remediation of soils contaminated by medium and low concentration polyeyelie aromatic hydrocarbons(PAHs), and the relationship between the degradation of PAHs and the inoculated and indigenous microbes. The addition of high-effective PAHs-degrading bacteria promoted the biodegradation of soil PAHs, and the effect is remarkable in the first two weeks. The biodegradation of test PAHs was phenanthrene