Waste water treatment plant

Details Waste water treatment plant Waste water treatment plant

C - Chemistry, Metallurgy

02

F

362/16

C02F 3/02 (2006.01) B01D 21/00 (2006.01) C02F 3/08 (2006.01)

Patent

CA 1235827

- 10 - ABSTRACT OF THE DISCLOSURE To desludge the final settlement tank of a waste water treatment plant which includes a bio zone equipped with slowly rotating rotors on which biomass deposited from the waste water is digested by microorganisms as the biomass is periodically exposed to air, the level of liquid in the final settlement tank is raised above that in the bio zone so that gravity induced desludging can occur. One of the rotating rotors can be equipped with water lifting means to generate the required hydraulic head for desludging. Skimming off of scum from the surface of the water in the final settlement tank can also be effected using the hydraulic head between the tank and the bio zone.

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