COMPACT UNIT FOR SEWAGE PURIFICATION Russian patent published in 1994 - IPC

FIELD: biological purification of sewage. SUBSTANCE: unit has body provided with centrally mounted flotation means for sludge separating. The body accommodates an aeration compartment (aerotank), a reaeration space (regenerator) and an activated sludge clarifier having a thin-layer module mounted in it. Stripping means are also positioned in the body. Jet aerators are mounted in the top parts of the mentioned aeration compartment, reaeration space and flotation means for sludge separating. The jet aerator positioned in the latter means has an upright lowering pipe with a reactive distributor and a pressure conduit mounted on it, the conduit introducing initial sewage to the unit. The spray aerator positioned in the reaeration space has lowering pipes mounted on it the pipes are provided with outlet branches for setting the flow in twisting. Pressure sludge conduits are connected to the pipes for introducing activated sludge from the clarifier tank. The jet aerator accommodated in the aeration compartment has a pressure conduit for causing the sludge mixture to circulate. EFFECT: stable recirculation and regeneration of activated sludge, effecting intensified sewage purification. 1 dwg