[The destruction of mono- and polycyclic aromatic hydrocarbons by cultures of Pseudomonas fluorescens 1-D biovar II and Bacillus subtilis 2-D].

Cenosis of microorganisms, coal resin destructors, is selected by the percolation method. A microbiological analysis of bacterial associations able to destruction of aromatic hydrocarbons composing the coal resin is carried out. Pure cultures are isolated as the most active destructors of these substrates. Destructive cultures are identified as Pseudomonas fluorescens 1-D biovar II and Bacillus subtilis 2-D. Efficiency of the microbiological refinement of coal-resin-contaminated soil by the isolated pure cultures and by their mixture is compared with self-refinement of soil. It is shown that complete refinement of soil from coal resin with contamination of 1 g per 1 kg of soil was attained after 160 days using the mixture of isolated destructive cultures P. fluorescens 1-D biovar II and B. subtilis 2-D. Usage of only P. fluorescens 1-D biovar II provided destruction of 87% of contaminating substances for the same period, whereas self-purification of soil by the natural cenosis of microorganisms made the purification level of 42%.