FIELD: sewage treatment. SUBSTANCE: method involves reduction of hexavalent chrome in acidic medium followed by precipitation of its compound with alkali for two stages. The first stage is carried out with reducing agent aqueous solvents and the second stage - by addition of dry reagent to filtrate after the first stage. Reduction degree in the first stage is limited (not above 98.4%). Method is used in metallurgy, chemical and machine engineering industry. EFFECT: decreased reagent consumption, high degree of treatment, simplified slime removal. 2 cl, 1 tbl, 4 ex
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