Abstract
As a result of enrichment cultivation using ortho-phthalate, naphthalene or biphenyl as a selective factor, six aerobic bacterial associations were obtained. It was found that all associations, having reached a sta-ble composition, actively grow on a selective substrate. However, associations, isolated using ortho-phthalate as a selective factor, do not have the ability to use biphenyl as a carbon source. Associations R24, R63, R26 and R62 grow effectively in a mineral medoum with biphenyl, and also decompose com-mercial PCB mixtures by the classical pathway of biphenyl oxidation. The level of destruction of Trihlo-robiphenyl by these associations was 99.7 - 99.8%, and for Sovol - 99.6 - 99.8% in 8 days. At the same time, there was no significant difference in biodegradation indices between the R24 and R63 associations selected on biphenyl and the R26 and R62 associations isolated on naphthalene.
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