The formation of waste water reuse technologies based on smart technologies will allow to fully meet the human demand for water in the face of global climate change, and at the same time protect the human being from damage caused by various polluting chemicals and ensure food safety. In particular, to meet the demand for water by using secondary purified water in sectors that produce large-scale food and feed products, such as the cultivation of agricultural crops, livestock, poultry, and fisheries,to proper organization of reuse of wastewater from production enterprises, use of waste water in agriculture as technical water by different methods (chemical, biochemical, physical and biological) treatment of waste water unsuitable for use in production, organization of bioremediation treatment of secondary waste water from agriculture by producing secondary products (receiving microalgae and macrophyte biomass) along with the process of purification from various chemical compounds and substances, products that are extremely important for various sectors of the economy, including, protein, carbohydrates, lipids, protein-vitamin complexes for the food industry, pigments, chlorophylls, carotenoids, biopaints, food additives containing w-3, w-6, w-9, bioplastic, w-carotene for the pharmaceutical industry, immunostimulant, cardioprotector, antaxant, glycerol, anti-inflammatory and anti-obesity agents, biofertilizers for agriculture, feed and additives, biofuel for the bioenergy industry (biodiesel, methane, hydrogen, liquid hydrocarbons) and cosmetic products. At the primary stage of these processes, one of the important tasks is to determine the degree of contamination of industrial and domestic wastewaters with chemical compounds and substances. Therefore, in this article, the levels of contamination of domestic wastewater from oil and gas production enterprises with harmful chemical elements have been determined. In the course of research, the average level of phosphate pollution in the waste water coming out of the facility at the oil and gas production enterprise was 5.66 mg/l (2.26 times more than the established standard), chlorides 651.74 mg/l (1.86 times the established standard more), sulfates 664.33 mg/l (1.9 times more than the established norm), nitrates 531.62 mg/l (11.8 times more than the established norm), nitrites 16.36 mg/l (5.0 times more than the established norm it is found to be many times more). When the obtained results are compared, the indicators of contamination with chemical compounds in the waste water coming out of the enterprise have a seasonal nature, and the indicators of contamination increase as the winter season passes to the summer season. This situation is explained by relatively more use of tools used in municipal processes during the summer.

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