Microporous filter media with intrinsic safety feature

Details Microporous filter media with intrinsic safety feature Microporous filter media with intrinsic safety feature

A - Human Necessities

61

L

A61L 2/02 (2006.01) B01D 39/08 (2006.01) C02F 1/00 (2006.01) C02F 1/28 (2006.01)

Patent

CA 2752109

The present invention is directed to a microporous filter medium treated with a microbiological interception enhancing agent comprising a cationic chemical having a medium to high charge density and a molecular weight greater then about 5000 Daltons, adsorbed on at least a portion of the microporous structure, and a biologically active metal in direct proximity to the cationic chemical and also on at least a portion of the microporous structure, wherein the flow of fluid through the filter medium decreases in response to an amount of polyanionic acids present in an influent. Robust microbiological interception is still maintained due to the extended empty bed contact time as a result of the diminished flow rate.

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