Activated sludge treatment of wastewater and apparatus therefor

Details Activated sludge treatment of wastewater and apparatus therefor Activated sludge treatment of wastewater and apparatus therefor

C - Chemistry, Metallurgy

02

F

362/19

C02F 3/04 (2006.01) C02F 3/08 (2006.01)

Patent

CA 1067219

ABSTRACT OF THE DISCLOSURE A method for substantially improving the operating efficiency of an activated sludge wastewater treatment plant utilizes rotating contactors that are partially submerged in the wastewater in the aeration tank of the activated sludge plant. The rotating contactors provide a fixed film media for the growth of biological life that is present in the recycled activated sludge in the aeration tank. The result is a more active biological coating on the fixed film media than is found on such media when used as a separate secondary treat- ment. In the preferred embodiment, the energy to rotate the contactors is supplied by the same compressed gas that is nor- mally introduced below the surface of the wastewater in the aeration tank of the conventional activated sludge system. An apparatus particularly adapted to perform the disclosed method is also disclosed.

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