FIELD: biological sewage treatment. SUBSTANCE: device is comprised of an aerofilter with a charge, a sewage delivery pipeline, aeration tank with aerators, secondary settler, silt mixture delivery pipe to recirculation and into secondary settler of recirculation pump and return silt pipeline. EFFECT: higher treatment efficiency, deep final treatment of sewage, reliable quality of treated water, lower expenditures for subsequent treatment of sewage and processing of sediment, smaller area occupied by treatment works. 2 dwg
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