Apparatus for aerobic treatment of activated sludge

Details Apparatus for aerobic treatment of activated sludge Apparatus for aerobic treatment of activated sludge

C - Chemistry, Metallurgy

02

F

362/9

C02F 3/12 (2006.01) C02F 3/26 (2006.01)

Patent

CA 1068018

APPARATUS FOR AEROBIC TREATMENT OF ACTIVATED SLUDGE Abstract of the Disclosure In an apparatus for the gasification of a biomass in an aqueous medium in the presence of organic substances degrad- able by the biomass, comprising a gasification tank, and a clearing chamber for the gasified water-containing biomass pro- vided concentrically around the gasification tank, the gasifi- cation tank communicating with the clearing chamber through an inlet in the latter, the improvement wherein a) the gasification tank is from about 10 to 32 meters high, has a height/diameter ratio between approximately 40 and 0.2, is provided adjacent its floor with gas inlet points, and is connected via inlet pipes to at least one gas removal and flocculation cyclone; b) the same liquid level in all the clearing chambers is maintained by means of an overflow channel at about 0.1 to 2 meters below the liquid level of the gasification tank; and c) a sludge removal pipe connects each clearing chamber with a collector pipe. Advantageously the clearing chamber is funnel shaped.

267032

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