FIELD: process engineering.
SUBSTANCE: invention relates to treatment of sewage using activated sludge and device to this end. Sewage is fed into equalising tank of treatment plant and pumped therefrom into activation tank. Treated water is fed from activation tank into secondary setting basin and, therefrom, into discharge opening after settling of remained sludge. With sewage level in balancing tank decreased below preset minimum level, activation process is shut off to pump excess sludge from activation tank. With sewage level increasing to above preset level, sludge pumping is interrupted to resume activation.
EFFECT: possibility of operation at irregular sewage inflow, higher treatment efficiency.
2 cl, 3 dwg
