Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1994-07-27
1995-10-31
Lithgow, Thomas M.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210712, 210713, 210805, 2102212, 210194, 210197, 210788, C02F 124
Patent
active
054626692
ABSTRACT:
A method and apparatus for dissolved air floatation (DAF) and for gas-liquid contacting operations by dissolved air floatation. A number of involute flow channels in a container have inlets and outlets positioned at either end for involutional or evolutional flow of a mixture of liquid and dissolved gas. Liquid turbulence and mixing are prevented in order to achieve a near plug-flow condition for maximum separation. Other uses of the method and apparatus include hydraulic flocculation of suspended matters in a liquid, separation of non-floatable suspended matters, oxidation of dissolved organic matter, activated sludge processes, purification of water using a biocide, separation by absorption of gases, stripping by desorption of dissolved gases, and gas-liquid reactions.
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