Patent ID: 6524478
Filing Date: 2003-02-25
Classification: B01D,C02F

Abstract:
An apparatus for filtering and separating a fluid by reverse osmosis as well as micro-, ultra-, and nano filtration, comprising: at least one stack of spaced planar filter elements having opposite-spaced membranes with outer surfaces to be contacted by said fluid for the collection of permeate from said fluid within said filter elements, each filter element including a planar form-stable stabilization element consisting of a porous material disposed between said opposite membranes and extending internally within the circumference of the membrane element for providing internal stability to the membrane element and permitting passage of permeate, at least one draining rod extending through each stack of filter elements and the stabilization elements, said draining rod being tubular and having, in each filter element, an opening for collecting permeate from the respective filter element, and being in communication with a permeate discharge, and vacuum generating means in communication with each draining rod for generating a vacuum in said filter elements thereby providing a pressure differential between the interior of said filter elements and their outer surfaces which are in contact with said fluid for causing part of said fluid to permeate into said filter elements from where said permeate is drained.