Cleaning and Regenerating Procedures


  1.  Forward flow with cold water up to 68˚F at flow rates up to 8 gallons per minute per 10” of membrane cartridge length.
  2. DO NOT ALLOW BACKWARD FLOW THROUGH MEMBRANE CARTRIDGES.
  3. Forward flow with hot water up to 175˚F at flow rates up to 4 gallons per minute per 10” of membrane cartridge length.
    DO NOT ALLOW BACKWARD FLOW THROUGH MEMBRANE CARTRIDGES.
  4. Soak overnight in a 2% by weight, caustic solution
    (2% by weight, sodium hydroxide mixed with water at a temperature up to 145˚F).
    CAUTION: This solution is highly caustic and can cause severe eye injury.Required Safety Equipment: Rubber gloves, rubber apron and full face shield
  5. After soaking, remove membrane cartridges and hose down with tap water.
  6. Soak in a high acid solution with pH below 2.0 for at least one hour. Be certain to take proper safety precautions.
  7. Remove cartridges and hose down with tap water. Install cartridges in the housing.

Notes:

  • The caustic solution should last a very long time. To refresh the solution, add caustic concentrate to return the solution to the original pH.
  • The high acid solution will need to be dumped every two to four weeks since there are acid tolerant bacteria that can live in pH 1.7-2.0.
  • After cleaning, acidified SO2 solutions can be used for short term storage, though Orings must be removed during storage in SO2. Solutions of alcohol (40%), such as vodka can be used for short or long term storage.