FIELD: sewage purification. SUBSTANCE: treatment of origin suspension is carried out in diaphragm electrolyzer in the area of positive electrode. The process takes place at pH 1-4 within 0.5-2.0 h, current density being 1-30 mA/1-30 mA/cm2. Then saturation by air under pressure followed by separation into concentrated foamed product and clarified liquid is carried out. Clarified liquid is, treated additionally in electric field at pH 7.0-8.0, additional clarifying takes place by settling. Concentration degree increases 2.0-2.5 times. EFFECT: improves efficiency of the method.
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