APPARATUS FOR PURIFYING HOUSEHOLD WASTE WATER Russian patent published in 2015 - IPC C02F9/14 C02F3/30 C02F1/44 C02F103/20 

FIELD: chemistry.

SUBSTANCE: apparatus for purifying waste water comprises hydraulically series-connected settling and balancing tank (C1), an anaerobic unit (C2.1), an anoxic unit (C2.2), an oxide unit (C3), a membrane filter unit (C4) and auxiliary equipment. The settling and balancing tank (C1) comprises a device for receiving starting waste water; an anaerobic unit (C2.1) adapted to feed therein activated return sludge together with waste water from the oxide unit (C3); the oxide unit (C3) is adapted to feed therein return sludge from the membrane unit (C4) is provided with an aerating device (C0); and the membrane filter unit (C4) is provided with an aerating device (C0) and a vacuum device for removing purified water (H2.1) for discharge.

EFFECT: high efficiency of purifying waste water, achieving maximum allowable concentration of contaminants on BOD5, COD, ammonium and nitrate nitrogen, phosphate phosphorus, while ensuring small dimensions, mobility and universality of the apparatus, high reliability of the apparatus in conditions of a non-uniform qualitative and quantitative composition of the starting waste water.

12 cl, 1 dwg, 1 tbl