FIELD: technological processes.
SUBSTANCE: invention can be used in treating sewage effluent. Sewage is fed into a receiving chamber 2 having an aerator 6. An air-lift pump 8 pumps the mixture of sewage and active sludge into an aeration tank 3. Sewage undergoes primary mechanical purification on a filter 7. Fine-bubble aeration of the sewage takes place in the aeration tank through the aerator 9. An air-lift pump 10 pumps the purified mixture of water and sludge into a stabiliser 13 of a secondary settling tank 4. Purified water settles in the secondary settling tank which is in form of a flattened cone. The water is further purified with a fat trap 15. The settled purified water passing through filter 14 comes out of the apparatus by gravity through an outlet pipe. Active sludge is separated in a settling chamber 5.
EFFECT: invention improved quality of sewage treatment, reliability, air-tightness and corrosion resistance of the structure of the apparatus.
4 cl, 1 dwg
