METHOD OF WATER TREATMENT Russian patent published in 2003 - IPC

FIELD: treatment of sewage, domestic and industrial waste water; metallurgy; chemical, food- processing, wood-working, oil refining industries. SUBSTANCE: proposed method is used for cleaning water from contaminants, such as compounds of alkali, alkali-earth, transition, heavy and radioactive elements, petroleum products, colloidal particles, organic compounds including dyes, high-molecular agents and surfactants, as well as for thickening and reducing moisture content of sludge. Coagulant with flocculant and activating additive are introduced in water to be cleaned. Mass ratio of activating additive to coagulant ranges from 0 to 500 parts by mass. Water is also subjected to treatment with elastic oscillations at intensity ensuring realization of cavitation in water at cavitation noise level in frequency range of from 500 to 500000 Hz no below 50 dB over entire volume of reactor and acoustic macro- and micro-flows at rate no less than 1% of oscillatory velocity of surface transmitting elastic oscillations to liquid. Water is treated with all said methods simultaneously in combined mode. Solid phases are removed. EFFECT: enhanced efficiency of cleaning; reduced power and labor requirements. 13 cl, 1 dwg, 5 ex