FIELD: water treatment; applicable in water treatment for process needs and treatment of industrial wastes from oil products, and in drinking water supply. SUBSTANCE: waste water is subjected to electrocoagulation under vacuum. Then, conducted successively at pressure of 2-70 kPa is water separation in gravitational field at vacuum-treated water surface-to-its volume ratio of 0.2- 1.0, and flotation in electromagnetic field of radiation of IR spectrum with wave length of 8.10-7-5.10-5 m. EFFECT: intensified operations of separation and flotation, and as a result, higher productivity of water treatment with attainment of high degree of removal of oil products. 3 tbl
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