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Membrane batch filtration process

  • US 20050194315A1
  • Filed: 02/22/2005
  • Published: 09/08/2005
  • Est. Priority Date: 02/27/2004
  • Status: Abandoned Application
First Claim
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1. A batch membrane filtration process comprising the steps, performed in repeated cycles, of:

  • a) filling a tank to immerse membranes in the tank;

    b) after step (a), withdrawing permeate through the membranes while adding feed to keep the membranes immersed;

    c) after step (b), withdrawing permeate while the flow of feed is reduced or stopped to lower the water level in the tank;

    d) backwashing the membranes; and

    , e) after steps (a), (b) and (c), draining the tank.

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