Hybrid membrane module, system and process for treatment of...

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 9/02 (2006.01) B01D 61/00 (2006.01) C02F 1/00 (2006.01) C02F 1/28 (2006.01) C02F 1/32 (2006.01) C02F 1/44 (2006.01) C02F 1/469 (2006.01) C02F 1/52 (2006.01) C02F 1/72 (2006.01)

Patent

CA 2638102

A process for reducing the content and volume of organic matter in a wastewater stream comprises contacting the latter with a nanofiltration device so as to obtain a concentrate, and a permeate as an aqueous stream containing any salts of non-precipitable metal ions which may be present, then contacting the concentrate with a preferably backflashable ultrafiltration device, and optionally also with activated carbon. This process may be part of a broader one which also removes other components from the wastewater stream. A module comprising (a) a nanofiltration device; (b) a preferably backflashable ultrafiltration device; (c) conduit(s) adapted to convey nanofiltration device concentrate to the ultrafiltration device; and optionally (d) a vessel containing activated carbon; as well as a system for treating a wastewater stream which includes this module, also form part of the invention.

L'invention porte plus particulièrement sur un procédé de réduction du contenu et du volume des matières organiques dans un courant d'eaux usées consistant à le faire passer dans un dispositif de nanofiltration pour obtenir un concentré, et un perméat sous la forme d'un courant aqueux contenant tous les sels d'ions métal non précipitables pouvant être présents, puis à faire passer le concentrât dans un dispositif d'ultrafiltration de préférence à rétrochasse, avec facultativement du charbon actif. Ce procédé peut faire partie d'un procédé plus vaste qui élimine d'autres composants du courant d'eaux usées. L'invention porte également sur un module de filtrage comprenant: (a) un dispositif de nanofiltration; (b) un dispositif d'ultrafiltration de préférence à rétrochasse; (c) un ou des conduits transportant le concentrât du dispositif de nanofiltration au dispositif d'ultrafiltration; et facultativement (d) une cuve contenant du charbon. L'invention porte en outre sur un système de traitement de courant d'eaux usées incluant ce module.

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