Liquid purification or separation – Processes – Chemical treatment
Reexamination Certificate
2006-02-14
2006-02-14
Fortuna, Ana (Department: 1723)
Liquid purification or separation
Processes
Chemical treatment
C210S767000, C210S650000, C095S285000
Reexamination Certificate
active
06998058
ABSTRACT:
The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting the microbiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. At least a portion of the surface of the at least some of the fibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.
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Fortuna Ana
Ma Shirley S.
Wamer Gary L.
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