C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/2
C02F 3/20 (2006.01) B01F 3/08 (2006.01) C02F 3/26 (2006.01) B01F 3/04 (2006.01)
Patent
CA 1063263
A SINGLE-STAGE PROCESS AND APPARATUS FOR CONTINUOUS INTRODUC- TION OF OXYGEN-CONTAINING GASES INTO EFFLUENT CONTAINING ACTIVATED SLUDGE Abstract of the Disclosure A process and apparatus for the continuous introduc- tion of air or oxygen-containing gases into an effluent contain- ing activated sludge, the oxygen-containing gas largely being consumed by the effluent containing activated sludge in a single absorption stage, comprising introducing through a plurality of gas inlets an oxygen-containing gas into an effluent containing activated sludge which is in a basin under its own hydrostatic pressure of at least about 0.9 bar, the gas pressure of the gas introduced being about 0.01 to 0.5 bar above the hydrostatic pres- sure prevailing at the gas inlet, each gas inlet having a gas- swept cross-sectional area of at least about 0.01 m2 which is loaded by at least about 100 effective cubic meters of gas per square meter of cross-sectional area per hour, and the individ- ual gas inlets being separated by a distance of at least about 0.5 meter, as measured from the middle point of a gas inlet. The gas inlets may be nozzles, ejectors or apertured plates preferably spaced equidistantly from one another and each may be supplied with propulsion liquid comprising effluent containing activated sludge. Preferred ranges from the various parameters depend upon whether the gas introduced contains more or less than 50 % by volume of oxygen.
248281
Guth Hans
Mann Theo
Zlokarnik Marko
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