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US 5,308,499 AGranted
Effluent treatment
AssigneeCommonwealth Scientific and Industrial Research Organisation
InventorsDavid R. Dixon, Tiong C. Ha
Life of this patent
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Abstract
An effluent treatment process having the steps of: a) adding a coagulant to the effluent to concentrate the organic material therein; b) treating the thus concentrated organic material with a mixture of a cationic polymer of copolymer in the presence of an anionic surfactant, a nonionic surfactant or both; and c) separating the organic material from the effluent by flotation.
Claims8
An effluent treatment process for an effluent containing organic material comprising the steps of:
- (a) adding a coagulant to said effluent to concentrate said organic material therein into a concentrated organic material;
- (b) pretreating said organic material or treating said concentrated organic material with a mixture of a cationic polymer or copolymer in the presence of an anionic surfactant, a nonionic surfactant or both;
- and
- (c) separating said concentrated organic material from said effluent after step (a) and step (b) by flotation comprising passing air bubbles through the effluent.
1 more element
Dependencies are inferred from the claim text.