Abstract

A description of causes of occurrence and consequences associated with late detection of a hidden man-induced contamination as well as materials of the experimental works on rehabilitation of a historically contaminated area located in the Atyrau region allowing to considerably reduce concentrations of contaminants (petroleum products) in soil-water bearing horizon in 2016-2019 is provided in this article. In the framework of anticipated activities on the area rehabilitation, a bioremediation of the contaminated ground water and soil layer has been undertaken using a method stimulating natural processes of the biological remediation based on a compulsory oxygen aeration of the contaminated soil layer with the purpose ofthe accelerated development of oil oxidizing bacteria community. The method provided in this article is an innovating pilot project implemented in the area of the Republic of Kazakhstan. It is based on the technological experience from the international practice, where a closed wells network was applied for injection of biostimulating reactants to solve similar tasks. At the same time, considering its adaptation to the local natural conditions, the tested method has appropriate distinctions from the alternatives both in terms of technological system of free drainage and bioremediation process efficiency control, and in terms the reactants applied for biostimulation

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