Influence of Bacterial Preparations on Petroleum Products Content and Number of Microorganisms at the Dumps of Exhausted Bleaching Clay

Abstract

Results of a field experiment are shown of the ability of Acinetobacter sp. ИБ ДТ-5.1/1, Оchrobactrum sp. ИБ ДТ-5.3/2 and consortium that they form, as well as the strain of Pseudomonas sp. ИБ-1.1 to detoxify oil-contaminated bleaching clay, stored on the territory of industrial waste landfill of Orsknefteorgsintez, JSC. With the help of germ cultures in a year of conducting the experiment we managed to reduce the number of residual hydrocarbons (by weight) from 7,12 to 2,3 – 2,97 % in the first sector, from 22,76 to 10,57 – 15,63 % in the second sector, as well as increase by 1 – 2 times the number of the main physiological microorganism groups, taking part in bioremediation of pollutants and decrease toxicity of the substratum which is purified for the plants in both sectors. Theh best results were achieved when applying the consortium of Acinetobacter sp. ИБ ДТ-5.1/1 and Оchrobactrum sp. ИБ ДТ-5.1/2 and the strain of Pseudomonas sp. ИБ-1.1.