DOMESTIC WASTE WATER BIOLOGICAL TREATMENT PLANT RECIRCULATION UNIT Russian patent published in 2024 - IPC C02F3/22 

FIELD: biological treatment of household waste water.

SUBSTANCE: recycling unit of a station for biological treatment of domestic waste water contains a pump connected to a sprinkler, a biofilter and an aeration device. Aeration device is made in the form of an ejector. Ejector comprises the first vertical pipe, one end of which is connected to the pump, and the other end is connected to the T-piece. Direct outlet from the T-piece is connected to the sprinkler by the second vertical pipe. Perpendicular outlet of the T-piece is connected to a horizontal pipe with its free end connected to a downward turn. Third vertical pipe is connected to the bend, on the free end of which there is a bend for turning. Pipe with internal narrowing made in the form of a piece of pipe of smaller diameter at the point of connection with direct inlet of the second T-piece is connected to the branch. Perpendicular outlet of the second T-piece is connected to the air intake pipe. Direct outlet of the second T-piece is intended for outlet of water-air mixture.

EFFECT: appearance of a new air supply source, which is equivalent to the use of a membrane compressor and a fine-bubble aerator, with an air capacity of up to 40 liters per minute, as well as maximum reduction of hydraulic load on biofilter, increase of pump efficiency, stability of its operation and service life, as well as reliability of station operation.

1 cl, 2 dwg