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LOW PRESSURE BACKWASH

  • US 20090255873A1
  • Filed: 08/30/2007
  • Published: 10/15/2009
  • Est. Priority Date: 08/31/2006
  • Status: Abandoned Application
First Claim
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1. A method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a low-pressure gas to the permeate remaining present in the filtration system when the filtration process is stopped or suspended to provide liquid for backwashing pores of the membrane during a backwashing process, wherein the low-pressure gas is at a pressure in the range of about 30 kPa to about 150 kPa.

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