Our country has several problems related to water. Firstly, there is water contamination, especially in industrial cities, such as my hometown. Another thing is that the drying up of the Aral Sea, which occurred after intensive use of water for agriculture, became so problematic in recent years. As a result of it, people suffer from diseases and water shortage.
Kazakhstan is the ninth-largest country in the world covering a land area of 2,724,900 square kilometres. The country has the potential for providing agricultural products to 1,5B people worldwide. At the same time, the Republic of Kazakhstan belongs to the countries that may face the problem of water shortage in the next decade. Intensive land use for agriculture could involve depleted industrial fields contaminated by oil and other pollutants. Also, land development itself involves intensive use of different types of machinery fueled by petrol. This could lead to soil and surface water contamination by oil spills. Bioremediation for oil-contaminated soil and wastewater is known as the most natural and environmentally friendly technique. This biological method involves water consumption as well. Therefore, the objectives of involving previously unused lands in agricultural circulation in Kazakhstan are associated not only with their pollution but also with the need to conserve water. Method of biological treatment in special installations - ex-situ, consists of the next stages: 1. cultivation of oil destructing microorganisms; 2. soil and water treatment in the presence of a destructor. This method will be effective due to the cultivation of the most active biological oil destructor and will allow more rational use of a given amount of water in the ex-situ method. In the study, microbial isolates were cultivated and investigated. The most active microorganism for the destruction of oil was identified. The opportunities for saving and reusing water while using an ex-situ method discussed and proposed for future large-scale investigation.