FIELD: process engineering.
SUBSTANCE: invention concerns effluents treatment equipment. Effluents are fed in receiving aeration tank 1 comprising aeration system 2 and active sludge. Organic refuse ferments 37 are decomposed. Fine inorganic fraction is removed from receiving aeration tank 1 and primary settler 3 by sand pump 5. Effluents are fed via overflow channel 8 into main aeration tank 7 for effluent to flow along spiral around submerged wed 12. Effluents overflow from chamber aerobic zone into anoxidic zone passes via top holes of web 12, while that from anoxidic zone into aerobic zone occurs via bottom holes of said web. As high-concentration living precipitate accumulates in chamber anoxidic zone, direction of spiral motion is changed into opposite one. Before discharge, purified water is fed into settler 27.
EFFECT: higher efficiency of effluents treatment.
8 cl, 3 dwg
