FIELD: sewage treatment. SUBSTANCE: method involves treating the active sludge-sewage mixture with natural sorbent peat at its concentration in the sludge mixture of 0.01-0.02 g/l. On expiration of 2.0 2.5 h of aeration, the sludge mixture is ozonized for 20-25 s. EFFECT: method intensifies the process of cleaning from synthetic surfactants, oil products and other hard-to-oxidize substances, promotes the quality of purified water at low capital and operating costs. 11 tbl
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