NEW PHYSIOLOGICAL AND MOLECULAR BIOLOGICAL PROPERTIES OF BACTERIA-DESTRUCTORS OF (CHLORO)AROMATIC COMPOUNDS
DOI:
Keywords:
Rhodococcus, polychlorobiphenyls, degradation, bioremediationAbstract
The isolation and study of bacterial strains - destructors of aromatic compounds from soils with different levels of hydrocarbon contamination has been carried out. It has been found that the strains belong to the genera Rhodococcus, Bacillus, Arthrobacter, Micrococcus, Achromobacter, Microbacterium, Psychrobacter, Exiquobacterium, Pseudomonas, Halomonas. Strains Rhodococcus wratislaviensis KT112-7, Rhodococcus sp. B7a, Rhodococcus sp. MD1, Rhodococcus sp. MD2, Pseudomonas sp. MD8 is decomposed a wide range of polychlorinated biphenyls, without the accumulation of toxic metabolites. The paper demonstrates for the first time the possibility to apply bacterial degradation under aerobic conditions to mixtures formed by chemical modification of the technical mixture of polychlorinated biphenyls of «Sovol» trademark under the influence of polyethylene glycol in the presence of potassium hydroxide or with the action of 2-aminoethanol. The possibility of remediation of PCB-contaminated soils using strains-destructors (R. wratislaviensis KT112-7) and their associations (Rhodococcus sp. B7a/Rhodococcus sp. G12a) has been experimentally demonstrated. Experimentally demonstrated the possibility of remediation of PCB-contaminated soils using strains-destructors (R. wratislaviensis KT112-7) and their associations (Rhodococcus sp. B7a/ Rhodococcus sp. G12a).
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