FIELD: waste water purification. SUBSTANCE: plant comprises tank for mixing of cleaning chemicals fed through multiple sectors in funnel and water impurities through screw arrangement; purifying tank to separate mixtures into floating substances, sediments of inorganic and organic materials, and cleaned liquid; and pipe system to withdraw cleaned liquid and sediments. Purifying tank has injector to mix gas and liquid and to inject thus prepared mix. EFFECT: improved equipment structure. 14 cl, 19 dwg
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