Patent ID: 6277292
Filing Date: 2001-08-21
Classification: C02F

Abstract:
A method of filtering liquid through a filter, the method comprising:providing a filter having a filter cavity comprising a first zone at least partly filled with anti-bacterial media and having a fluid outlet, and a second zone with a fluid inlet which is in fluid communication with the first zone outlet and the second zone being at least partly filled with media;forcing liquid through the first zone of the filter cavity so that a biocide is imparted into the liquid;collecting first-zone-treated liquid at the first zone fluid outlet and removing the collected liquid from the filter;conducting the collected liquid to a storage tank;returning the liquid from said storage tank to the filter by forcing the liquid back to the fluid outlet of the first zone, and then forcing the liquid to the second zone fluid inlet;forcing the liquid through said second zone; andremoving the second-zone-treated liquid from the filter.