HARDWARE FOR WASTEWATER TREATMENT TECHNOLOGY FOR WASHING AGRICULTURAL MACHINERY
The Rostov region is one of the leading regions in the purchase of agricultural machinery. Every year, the technopark of the Don farms is replenished with about 400 combines, 700 tractors and 2,000 units of other agricultural equipment. Before carrying out repairs or other maintenance operations, all agricultural machinery undergoes an external washing stage. The washing process produces wastewater with high concentrations of surfactants, oils, greases, waxes and other contaminants that make this wastewater toxic to aquatic organisms. The reuse of waste water will reduce the discharge of wastewater into water bodies, thereby preventing surface water pollution. The purpose of this work was to select the most suitable scheme for the treatment of washing wastewater for the possibility of their reuse. In this regard, the existing schemes for wastewater treatment from washing agricultural machinery are analyzed. The most effective scheme for the treatment of highly concentrated wastewater has been identified: preliminary electroflotation followed by disaggregation (phase separation) of contaminants. At the first stage of purification, an electroflotation complex with an electroflotation unit with insoluble titanium electrodes coated with a three-component anode coating (OIRTA) was used. The Pyramida N phase separation unit acted as the second processing stage. The optimal dose of the SKiF reagent was selected to intensify the purification processes. Recommendations on the choice of post-treatment facilities are given. The experiments were carried out on real wastewater from an agricultural equipment washing point in the Rostov region. The obtained results confirmed the possibility of using purified water for circulating water supply after additional purification and disinfection.