Waste water treatment plant

Details Waste water treatment plant Waste water treatment plant

1984-04-11

1985-07-02

Wyse, Thomas

Liquid purification or separation

With time control

210151, 210197, C02F 308

Patent

active

045266859

ABSTRACT:
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.

REFERENCES:
patent: 3534857 (1970-10-01), Berk
patent: 3703961 (1972-11-01), Feuer
patent: 3966604 (1976-06-01), Diggs
patent: 4028245 (1977-06-01), Stahler
patent: 4093539 (1978-06-01), Guarino

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