METHOD FOR BIOLOGICAL TREATMENT OF INDUSTRIAL AND SURFACE WASTE WATER CONTAINING CARBAMIDE AND AMMONIUM NITROGEN Russian patent published in 2025 - IPC C02F11/02 

FIELD: water treatment.

SUBSTANCE: task proposed invention is the development of a method biological treatment of waste water containing carbamide, ammonium nitrogen and, possibly, C_i-compounds, and it can be used for treatment of industrial waste water of industrial enterprises, treatment of surface waste water from production sites (independent process or combined with treatment of industrial waste water) and can also be used for combined treatment of industrial waste water containing carbamide, and household waste water of an industrial enterprise with simultaneous achievement of stability of implementation of the method under conditions of uneven inflow of surface waste water and reliability of obtaining standard quality of treated surface waste water as per the following indicators: suspended substances, COD, BOD, forms of nitrogen, carbamide, phosphorus phosphates regardless of initial concentrations of pollutants, as well as prevention of contamination of areas adjacent to the industrial site.

EFFECT: implementation of a certain sequence of purification steps, which form the best conditions for biodegradation of organic substances, including carbamide, nitrification and denitrification during a continuous purification process, in spite of possible irregular inflow of surface waste water in terms of consumption and concentration of pollutants, as well as treatment of domestic waste water in a single cycle with treatment of surface and/or industrial waste water of an industrial site.

6 cl, 4 dwg