FIELD: chemistry, water purification.
SUBSTANCE: invention can be used for biological sewage treatment. Inflow midportion is supplied from distributor box 3 through the pipeline 3.1 to the second section of aeration tank 4.2 with its excess delivered through overflow lip 3.2 to the first section of aeration tank 4.1 where contacts with increased amount of sludge and is supplied through drain port to the second section 4.2 and further to sludge sedimentation tank 5 and post-treatment unit 7. Level in the specified capacities is increased. It is accompanied with decreasing of pipeline 3.1 throughput, while that of pipeline 8.1 increases.
EFFECT: stabilised quality of purified water in increased inflow without control and automation devices.
6 cl, 4 dwg
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