Methods for improving filtration performance of hollow fiber...

Details Methods for improving filtration performance of hollow fiber... Methods for improving filtration performance of hollow fiber...

2008-05-27

2008-05-27

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S094000, C210S096200, C210S321690, C210S500230, C210S650000, C700S273000

Reexamination Certificate

active

07378024

ABSTRACT:
In accordance with the present invention, there are provided methods for improving performance of hollow fiber filtration membrane modules. Invention methods comprise a unique backwashing technique wherein the hollow fiber membranes within the module are pressurized with a gas on the feed side at specified times during the backwash. Periodic use of invention methods effectively removes fouling components from the hollow-fiber membranes, thereby providing stable permeability and low trans-membrane pressures, which results in an efficient and economic filtration process. In addition, there are provided methods for cleaning hollow fiber membranes and increasing filtrate flow rate through membranes.

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