METHOD OF TREATMENT OF INDUSTRIAL SEWAGE Russian patent published in 2000 - IPC

FIELD: treatment of industrial sewage from ions of heavy metals, petroleum products, surface-active agents, sulfates, nitrates, chlorides; electrotechnical and instrumentation engineering; mechanical engineering and other industries. SUBSTANCE: sewage is subjected to preliminary cleaning in surge reservoir also receiving sediment after galvanocoagulation. Mixture thus formed is subjected to magnetoacoustic resonance action in audio frequency range at radiation power of 15 to 20 mV for 50-60 min once a day. After separation of liquid and solid phases, liquid phase is directed for successive galvanocoagulation in two galvanocoagulators; galvanic couple in first galvanocoagulator is formed from coke and iron particles and that in second coagulator is formed from mixture of coke and aluminum. After galvanocoagulation, sediment is directed to preliminary treatment process and liquid phase is used as cleaned sewage in circulating water supply systems. EFFECT: increased degree of purification of sewage. 3 cl, 1 dwg