FIELD: treatment of industrial sewage. SUBSTANCE: sewage treatment is carried out by addition of 50-150%-th excess of precipitating agent - magnesium oxide (hydroxide). Obtained chrome hydroxide is separated, dissolved in acid and treated with alkali up to pH = 9.0-9.5 to isolate pure chrome hydroxide and then up to pH = 11.5 to isolate precipitating agent (magnesium hydroxide) and to recover its to the process of chrome precipitation. Regenerated chrome can be used further for leather tanning, in nonferrous metallurgy, for metal working. EFFECT: enhanced quality of solution and regenerated chrome hydroxide. 1 dwg, 3 tbl
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