Liquid purification or separation – Constituent mixture variation responsive
Patent
1980-04-24
1982-04-13
Wyse, Thomas G.
Liquid purification or separation
Constituent mixture variation responsive
210134, 210194, 210199, 210926, C02F 326
Patent
active
043246559
ABSTRACT:
A process and apparatus for treating wastewater with oxygen in which the wastewater is circulated on a horizontal course and is exposed to the introduction of oxygen or oxygen-enriched air in one or several sections of its course whereas it is exposed to the atmosphere on the remainder of its course. Oxygen of a higher concentration than atmospheric oxygen is contacted at least intermittently with the water surface and introduced into the wastewater through agitation of the water surface. At least a part of the total volume of the wastewater is treated by carrying out alternately at least two of the following three modes of operation: (a) surface aeration of the wastewater using atmospheric air; (b) oxygenation while maintaining atmospheric pressure above the wastewater; and (c) oxygenation while maintaining positive pressure above the wastewater with the operating modes alternating with each other in response to variations in the volume and/or character of the wastewater being treated.
REFERENCES:
patent: 3725258 (1973-04-01), Spector et al.
patent: 3757950 (1973-09-01), Zebley
patent: 3964998 (1976-06-01), Barnard
patent: 4159923 (1979-06-01), Okey
patent: 4260486 (1981-04-01), Reid
patent: 4278547 (1981-07-01), Reid
Passavant-Werke Michelbacher Hutte
Thompson Jr. Woodford R.
Wyse Thomas G.
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