Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-04-09
1981-07-14
Lutter, Frank W.
Liquid purification or separation
Processes
Treatment by living organism
210926, 210614, 210739, C02C 117
Patent
active
042785472
ABSTRACT:
Dual baffle aerators substantially prevent back-mixing of freshly aerated liquor into aerator intakes and provide directional propulsion. By connecting two or more such devices to form a barrier across the channel of an oxidation ditch, homogeneous aeration is provided to the mixed liquor.
Barriered pump/aerator assemblies utilizing directional mix jet aerators (eddy jet) can also be combined with dual-baffle aerators.
An adjustably apertured barriered pump assembly is opened sufficiently to conserve momentum in the translationally flowing liquor while preventing back-mixing of aerated liquor.
Processes for providing point-source or multi-source aeration, by using two or more barriered pump assemblies, can be provided at one barrier and the advantages of point-source homogeneous aeration can be provided at another barrier, at least one barrier being adjustably apertured.
REFERENCES:
patent: 1643273 (1927-09-01), Imhoff
patent: 2263534 (1941-11-01), Aldridge
patent: 3643403 (1972-02-01), Speece
patent: 3671022 (1972-06-01), Laird et al.
patent: 3994802 (1976-11-01), Casey et al.
S. L. Soo, Power Spray Cooling, 11-1975, A.S.M.E. Publication Bulletin 75-WA/PWR-3.
Clements Gregory N.
Lelong Marion P.
Lutter Frank W.
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