FIELD: sewage treatment. SUBSTANCE: method involves treatment with mineral acid to pH = 3.0-6.8 and hydrogen peroxide is added as an oxidizing reagent at ratio of sewage and hydrogen peroxide = 1:(0.05-0.08). After upper oily layer removing the median an aqueous-emulsion layer is isolated, treated with nonpolar solvent and upper oily layer is removed also. Method is used in machine engineering and metal-working industry. EFFECT: improved method of treatment.
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