Patent ID: 8257594
Filing Date: 2012-09-04
Classification: B01D,C02F

Abstract:
1. A filtration system, comprising: at least one reverse osmosis filtration member connected to a feed line, a tank line, and a drain line; an output line to deliver an output flow from the filtration system; first and second water-on-water vessels each configured to alternate between a service state and a fill state such that when the first water-on-water vessel is in the fill state, the second water-on-water vessel is in the service state, and when the second water-on-water vessel is in the fill state, the first water-on-water vessel is in the service state, each water-on-water vessel comprising a first container and a second container; wherein, for each vessel: a plurality of valve members; and a control system configured to control the plurality of valve members to switch between service and fill states for the first and second vessels.