Bacteriostatic filter media

Details Bacteriostatic filter media Bacteriostatic filter media

1980-09-15

1983-08-02

Lander, Ferris H.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210266, 210501, 210502, 210694, 210764, B01D 3702

Patent

active

043965121

ABSTRACT:
Improved bacteriostatic filter media mixture comprising specially treated, dried, silver-bearing, highly purified, inert material in particulate or fibrous form, such as cellulose fibers, mixed with specific proporations 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 segregated, silver-treated cellullose fibers uniformly interspersed among the carbon filter material. The treated cellulose in the mixed filter media is in an amount sufficient to provide overall filter bacteriostatic effect to passs EPA Office of Pesticides Regulations FR 41:152 for home water filtration use, and to have improved coliform bacteria suppression after stagnant periods. Adsorptive and precoatability properties of the carbon are not inhibited, and carbon densification, leading to fall-off, does not occur.

REFERENCES:
patent: 2785106 (1957-03-01), Mendelsohn
patent: 3268444 (1966-08-01), Renn
patent: 3872013 (1975-03-01), Nishino et al.

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