Flotation process for purification of waste water

Liquid purification or separation – Processes – Ion exchange or selective sorption

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210705, C02F 124

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active

043115950

ABSTRACT:
In a flotation method for purification of industrial or municipal waste water, in which the waste water comes in contact with electrodes having an electrical potential capable of electrolytically decomposing a portion of the waste water, thereby creating an ascending stream of gas bubbles, the waste water is mixed before or during the electrolytic decomposition with wettable particles of polymer material which are practically insoluble in water and have an absolute density of 1.3 g/cm.sup.3 at the most. Polymeric materials, especially polyalkane fibrids, are suitable for use as particles. This process makes it possible to purify oil-containing waste water by electroflotation without forming an oil film on the electrodes.

REFERENCES:
patent: 3637490 (1972-01-01), Gardner
patent: 3723307 (1973-03-01), Hunter
patent: 3729410 (1973-04-01), Abadie et al.
patent: 3975269 (1976-08-01), Ramirez
patent: 4274971 (1981-06-01), Hartinger

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