Treatment method of the soil, polluted by oil and oil products in climatic conditions of Azerbaijan

In this work, two biotechnological technologies were tested to restore contaminated soils using microorganisms. One technology with the activation of natural microflora and a technology that requires the introduction of oil-oxidizing microorganisms in the form of a biological product. When using biological methods of cleaning soil from oil pollution in combination with agrotechnical methods, the natural microflora of oil-polluted soils was activated. The introduction of a biological product under these conditions makes it possible to increase the intensity of soil cleaning from oil pollution as a result of the cleaning time in comparison with the natural microflora, it can be reduced by 3-4 months. It should be noted that the methods of cleaning oil-contaminated soils using microorganisms in arid soil-climatic conditions are most effective in the spring and until mid-summer. In the summer, due to high temperatures, the activity of microorganisms decreases. Microorganisms become active again in the autumn. During this period, the activity of microorganisms is higher than in the spring period and this is due to the fact that before the summer period the number of microorganisms increases and after a slight decrease in activity, intensive biodegradation of oil pollution continues again.