Patent Number: 6,168,714

Title: Flux-enhanced cross-flow membrane filter

Abstract: A filtration system for a cross-flow membrane filter which reduces the deleterious effects of concentration polarization and membrane fouling, thereby increasing the average transmembrane flux. The filtration system includes a feed supply for providing a feed solution; a feed pump connected to the feed supply; a cross-flow membrane filter connected downstream of the feed pump for separating the feed into a permeate and a retentate, the cross-flow membrane filter including at least two membrane ports and at least two permeate outlets; a valve manifold assembly located between the feed pump and the cross-flow membrane filter; and a control system for controlling the valve manifold to selectively reverse the flow of the feed through the cross-flow membrane filter. Periodic reversal of the direction of flow of the feed stream in the membrane module, while maintaining the cross-flow, keeps the system in a hydrodynamically transient state and prevents the formation of an undesirable stable boundary layer at the membrane surface thereby increasing the average transmembrane flux.

Inventors: Ilias; Shamsuddin (Greensboro, NC), Hargrove; Sirena C. (Kittrell, NC), Talbert; Miles E. (Trinity, NC)

Assignee: North Carolina A&T University

International Classification: B01D 61/22 (20060101); B01D 61/12 (20060101); B01D 61/02 (20060101); B01D 61/14 (20060101); B01D 065/02 ()

Expiration Date: 01/02/2018