METHOD OF PURIFICATION OF WASTE WATER Russian patent published in 2004 - IPC

FIELD: purification of waste water in metal-working industry. SUBSTANCE: the invention is dealt with purification of waste water of the nonferrous metals and heavy metals, as well as other water pollutions of metallurgical and metal-working productions. The method provides for a galvanocoagulation purification of the waste water in the vertically located drum using agitation of a galvanomass with the waste water by an auger with the increasing upward the lead of screw. Simultaneously with the motion a stream of the air dressed with oxygen is fed in the drum upward. After the galvanocoagulation purification, the waste water is exposed to the flocculation and as a flocculating agent is used polydimethyldiallylammoniumbromide with concentration of 0.8 - 1.2 mg/decimeter cu. EFFECT: increase degree of the waste water purification. 1 tbl, 1 dwg