Method and apparatus for induced-flow circulation and pressurize

Details Method and apparatus for induced-flow circulation and pressurize Method and apparatus for induced-flow circulation and pressurize

1982-03-24

1984-06-19

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210194, 210220, 210926, 210629, 261 93, 261DIG75, C02F 320

Patent

active

044552327

ABSTRACT:
A barriered circulator/aerator in the endless channel of a barrier oxidation ditch provides a directly pumped flow of mixed liquor into a central liquor inlet zone and an energy-release induced flow of mixed liquor into a surrounding liquor inlet zone at the inlet of a deep oxygen contact duct which passes beneath the barrier to the discharge channel on the downstream side thereof. It further provides mixing of diffused air with the directly pumped flow and/or the induced flow and then moving the combined air-liquor flows into the deepest portion of the contact duct where point-source pressurized aeration of both flows occurs. Eddy jet diffusers are preferably used for aerating the induced flow. Oxygen transfer efficiencies are obtained that are 1.6-2.2 times as great per brake horsepower per hour as that attainable by 100% pumping of the mixed liquor in a total barrier oxidation ditch, as disclosed in U.S. Pat. No. 4,260,278.

REFERENCES:
patent: 4260486 (1981-04-01), Reid
patent: 4278547 (1981-07-01), Reid

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