Effluent treatment combining solid/liquid separation and...

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/48 (2006.01) B01D 21/00 (2006.01) B01D 61/04 (2006.01) B01D 61/16 (2006.01) B01D 65/08 (2006.01) C02F 1/44 (2006.01) C02F 1/46 (2006.01) C02F 1/463 (2006.01) C02F 3/12 (2006.01)

Patent

CA 2491454

The invention concerns an effluent treatment wherein a flow of said effluents is subjected to a pulsed electric field producing a physico-chemical and biological modification of the medium, used during a decantation or membrane filtration type solid/liquid separation. The solid/liquid separation (13, 14, 15) and the pulsed electric field treatment (12) are operations carried out at different points of the flow of effluents. The pulsed electric field has voltage value, current value, pulse repeat frequency and voltage front form characteristics selected, depending on the points where are performed the membrane filtration and pulsed electric field treatment, to obtain the desired treatment for the effluents.

L'invention décrit le traitement d'effluents dans lequel un flux desdits effluents est soumis et à un champ électrique pulsé responsable d'une modification physico-chimique et biologique du milieu, mise à profit lors d'une opération de séparation solide/liquide de type décantation ou filtration membranaire. La séparation solide/liquide (13, 14, 15) et la soumission à un champ électrique pulsé (12) sont des opérations effectuées à des endroits différents du flux d'effluents. Le champ électrique pulsé présente des caractéristiques de valeur de tension, de valeur de courant, de fréquence de répétition des impulsions et de forme du front de tension choisies pour, en fonction des endroits où sont effectuées les opérations de filtration membranaire et de soumission à un champ électrique pulsé, obtenir le traitement désiré des effluents.

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