Treatment of wastewater streams containing surfactants

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 9/02 (2006.01) B01D 61/14 (2006.01) C02F 1/28 (2006.01) C02F 1/44 (2006.01) C02F 1/58 (2006.01)

Patent

CA 2594316

A method of cleansing wastewater of surfactants. The method includes subjecting a wastewater stream containing surfactant contamination to ultra- filtration to separate components in wastewater including a concentrate and a permeate, and subjecting the permeate to contact with activated carbon sufficient to remove the surfactants to a desired level. The method is particularly suitable for dealing with surfactants from the alkylphenol ethoxylate family, and it is possible to reduce the level of surfactants in the wastewater stream to less than 0.1 mg/l by means of the disclosed method.

L'invention porte sur un procédé d'épuration des eaux usées contenant des tensioactifs. Le procédé consiste à soumettre à l'ultrafiltration un courant d'eaux usées contaminé par des tensioactifs afin de séparer les composants des eaux usées tels qu'un concentrat et un perméat, et mettre le perméat en contact suffisant avec un charbon actif de façon à retirer les tensioactifs jusqu'à un seuil désiré. Ce procédé est notamment approprié pour traiter des tensioactifs de la famille alkylphénol éthoxylate, et il est ainsi possible de réduire le taux des tensioactifs dans le courant des eaux usées jusqu'à moins de 0,1 mg/l au moyen du procédé précité.

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