Bacteriostatic filter media

Details Bacteriostatic filter media Bacteriostatic filter media

B - Operations, Transporting

01

J

21/1, 252/21

B01J 23/50 (2006.01) C02F 1/28 (2006.01) C02F 1/50 (2006.01)

Patent

CA 1140522

Abstract of the Disclosure Improved bacteriostatic filter media mixture comprising specially treated, dried, silver-bearing, highly purified, inert material in particulate or fibrous form, such as cell- ulose fibers, mixed with specific proportions of powdered, activated carbon filter material. Bacterial growth in and on the filter media is inhibited by silver ions slowly eluted or dissolved from the segragated, silver-treated cell- ulose fibers uniformly interspersed amongst the carbon filter material. The treated cellulose in the mixed filter media is in an amount sufficient to provide overall filter bacterio- static effect to pass U.S. Environmental Protection Agency (EPA) Office of Pesticides Regulations FR 41:152 for home water filtration use, and to have improved coliform bacteria suppression after stagnant periods. Adsorbtive and precoatability properties of the carbon are not inhibited, and carbon densifi- cation, leading to fall-off, does not occur.

352882

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