UNIT FOR DEEP PURIFICATION OF SEWAGE WATER Russian patent published in 2003 - IPC

FIELD: sewage water treating equipment. SUBSTANCE: unit has vertical cylindrical casing with coaxially arranged anaerobic treatment chambers positioned inside casing, annular settler with conical bottom and silt slots and aerobic treatment chambers comprising aeration device, sewage water supplying devices, active silt recirculation device, and purified water discharge device. Anaerobic treatment chamber is positioned in central part of casing and is defined by continuous cylindrical partition with silt mixture overflow chute fixed in its upper part. Anaerobic treatment chamber is provided with mixing device and anaerobic microflora immobilizing charge. Annular settler is positioned outside anaerobic treatment chamber and equipped with thin-layer modules arranged in its upper part and accumulating pockets arranged in its lower part. Aerobic treatment chamber is provided with microflora immobilizing charge. Sewage water supplying device is made in the form of vertical chute arranged in anaerobic treatment chamber. Active silt recirculation device is made in the form of airlift connected with accumulating pockets of annular settler. Purified water discharge device is made in the form of chutes arranged in upper part of annular settler. Said unit is used for purifying domestic and industrial water having similar contamination composition, in particular, for additional treatment of sewage water subjected to biological treatment. EFFECT: increased efficiency, enhanced reliability in operation and simplified operation and maintenance of purifying unit. 3 cl, 1 dwg