Membrane system and process therefor

B - Operations – Transporting – 01 – D

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B01D 46/12 (2006.01) B01D 69/12 (2006.01)

Patent

CA 1208139

IMPROVED MEMBRANE SYSTEM AND PROCESS THEREFOR ABSTRACT OF THE DISCLOSURE There is disclosed, in one aspect, a membrane system useful for filtering a fluid, such as a liquid, which contains particles, such as bacteria, to be removed from the fluid. The membrane system comprises at least two members selected from the group consisting of at least one prefilter and at least one porous asymmetric membrane. The asymmetric membrane has a skin or shiny side and a support or dull side. The membranes are arranged parallel to and in intimate contact with one another such that the fluid passes through each membrane. In another aspect, there is disclosed a process for filtering such a fluid using the membrane system described above. This process comprises filtering such a fluid using this membrane arrangement so as to substantially eliminate passage of any particles through the membrane system.

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