| US 7,572,383 B2 | ||
| Process for filtering a fluid with a compressible filtration media | ||
| William Frederick Dew, Jr., Montevallo, Ala. (US) | ||
| Assigned to Schreiber, LLC, Trussville, Ala. (US) | ||
| Filed on May 08, 2008, as Appl. No. 12/117,249. | ||
| Application 12/117249 is a division of application No. 10/661349, filed on Sep. 12, 2003, granted, now 7,374,676. | ||
| Application 10/661349 is a continuation of application No. 10/098738, filed on Mar. 15, 2002, abandoned. | ||
| Application 10/098738 is a continuation of application No. 09/627638, filed on Jul. 28, 2000, abandoned. | ||
| Application 09/627638 is a continuation in part of application No. 08/980537, filed on Dec. 01, 1997, abandoned. | ||
| Claims priority of provisional application 60/032643, filed on Dec. 10, 1996. | ||
| Prior Publication US 2008/0245743 A1, Oct. 09, 2008 | ||
| Int. Cl. B01D 24/16 (2006.01); B01D 24/46 (2006.01) | ||
| U.S. Cl. 210—741 [210/745; 210/792; 210/797; 210/805; 210/807] | 16 Claims |
| 1. A process for filtering a fluid to remove particles therefrom, said process comprising the steps of:
a) passing influent fluid containing particles through a filter bed comprising a compressible filtration media;
b) compressing the filtration media to define a porosity gradient in the filter bed proceeding progressively from more porous
to less porous in the direction of the flow of the influent fluid so that filtration proceeds in a direction from a more porous
to a less porous filter bed;
c) monitoring head loss across the filter bed;
d) altering the compression of the media during filtration in response to the monitored head loss to reduce head loss and
to increase the time between periodic cleanings;
e) withdrawing effluent, and
f) periodically expanding the filter bed while continuing to pass influent fluid containing particles through the filter bed
to wash the filtration media.
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