C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/17
C02F 3/02 (2006.01) C02F 3/00 (2006.01) C02F 3/12 (2006.01) C02F 3/20 (2006.01) C02F 3/30 (2006.01)
Patent
CA 1099037
Title of the Invention PROCESS AND APPARATUS FOR SEWAGE PURIFICATIOIN BY ACTIVATED SLUDGE TECHNIQUE ABSTRACT OF THE DISCLOSURE A sewage treatment facility includes a round reaction tank, a round aeration tank which encompasses the reaction tank, a final clarification tank and a sludge return station. The crude sewage is passed in part to the reaction tank and in part to the aeration tank, the partially purified contents of the reaction tank are caused to flow into the aeration tank via an overflow wall, the contents of the aeration tank flow, for the most part, to the final clarification tank, the activated sludge separated from the purified water in the final clarification tank is recirculated to the sludge return station, and part of the activated sludge is passed from the sludge return station to the reaction tank and part to the aeration tank. A small amount of the contents of the aeration tank is passed to the sludge return tank and from there to the reaction tank. A bridge rotating over the tanks includes downwardly extending aerators for aerating the contents in both tanks.
318258
Macrae & Co.
Schreiber August
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