FIELD: waste water treatment. SUBSTANCE: invention, in particular, relates to waste waters from textile, fur, leather industries, nonferrous metallurgy, and galvanic shops. Waste water is treated at pH 6-8 ammonium hydroxide in double weight excess to chromium. Filtrate freed from chromium hydroxide precipitate contains no chromium impurities. EFFECT: increased purification degree and enabled reuse of filtrate as diluent in washing operations. 1 tbl, 2 ex
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