Liquid purification or separation – Recirculation
Patent
1982-10-12
1986-04-29
Castel, Benoit
Liquid purification or separation
Recirculation
210220, 210926, 210261, 261DIG75, 261124, 261 93, C02F 320
Patent
active
045855552
ABSTRACT:
An improved barrier oxidation ditch is provided which has an inclined duct for the induced flow, whereby energy in the dammed-up momentum is more efficiently released. This induced-flow duct is inclined at 30.degree. to 60.degree. to the horizontal, preferably 45.degree., and is disposed upstream of, downstream of, or alongside of the circular/aerator in the intake channel. The induced-flow duct is preferably rectangular in cross-section and may have its downstream wall formed by the barrier if it is downstream of the circulator/aerator. It is connected at its lower end to the discharge duct to initiate a combined-flow portion thereof. An in-channel clarifier, disposed in the discharge channel so that its upstream wall is the barrier and its solid bottom is the ceiling of the combined-flow portion of the discharge duct, provides prolonged bubble retention time at maximum hydraulic pressure, whereby the efficiency of oxygen transfer is increased.
REFERENCES:
patent: 4226717 (1980-10-01), Malm
patent: 4362625 (1982-12-01), Beard
patent: 4383922 (1983-05-01), Beard
Brochure of Mixing Equipment Co., Inc., Rochester N.Y.
Newspaper article on p. 17 of Pine Bluff Commercial, Nov. 11, 1981.
Brochure of Innovatech Inc.; Valley Forge. Pa.
Castel Benoit
Lelong Marion P.
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