FIELD: natural gas and oil industry. SUBSTANCE: method involves flotation contaminants by gas fog produced by ejection of a portion of cleared water. Waste water is passed through separation stage and then to distribution system, with ejector being mounted in front of distribution system. A portion of clear water is delivered into ejector. Where gas fog type system is produced due to boiling of clear water. Gas fog type system is supplied to cleaning reservoir, where gas fog is aggregated with contaminants. Aggregated product is subjected to flotation from waste water. EFFECT: increased efficiency in cleaning sewage waters. 1 dwg
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