A microbial complex capable of decomposing or converting the essential oil compounds has been developed on the basis of oil-oxidizing microorganisms taken from oil-polluted soils and substrates from oil-slime sumps in the Komi Republic, Nenets Autonomous Area, Khanty-Mansi Autonomous Area, and Perm Region. The developed microbial complex is named the “Universal” bio-preparation with oil-oxidizing effect. The preparation is composed of different kinds of substrate-specific bacteria depending on the oil compounds found in the areas to be treated.

   Depending on the oil pollution concentration and the type of soils, the costs for bio-preparation range from three to seven per cent of the total remediation costs. In terms of the oil content decrease in the treated soils, effectiveness of the developed microbial complex ranges from 30 to 70 %. There are similar preparations in the market; however, few of them are effective in the extreme conditions of the North.