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Ion Exchange


  1. Periodic sampling of resin to identify potential organic fouling problems
  2. Scheduled replacement of activated carbon

Equipment Sizing and Design - Problems

  • DI Systems tend to be over-designed
  • Ideal flow for primary Ion Exchange 6-10 Gal./Min./Sq.Ft.
  • Ideal flow for polishing 20 Gal./Min./Sq.Ft.
  • At least one full day of operation before regeneration is required (Max 3-7 days to control bacterial growth)
  • Recirculation loop for idle DI units.  Recommended flow 5 Gal./Min./Sq.Ft.  UV may be included.
  • Minimum 50% freeboard for the Two-Bed DI and 100% freeboard for the Mixed-Bed DI


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All Content on this site is  intended for informational purposes for experienced water treatment professionals only.  Applied Membranes, Inc. does not assume any liability for any damages caused by the misapplication or misinterpretation of any of the information contained on this website.
Applied Membranes, Inc. 2007