FIELD: water treatment. SUBSTANCE: invention relates to treatment of surface waste water with elevated concentration of metal salts and other compounds including preliminary ozonation followed by collecting part of ozone-water mixture. Method is characterized by that ozonation is effected with ozone-air mixture for 15 min to residual concentration of ozone 0.1 mg/l and consumption of ozone-air mixture is controlled to be in proportion 3:1 to initial water. EFFECT: improved water purification quality. 1 dwg, 1 tbl
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