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Factors Affecting Perf.
Achieving Brine Efficiency
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Biological Growth on Membranes: 
Storage, Shipping, and System Shut-Down.

By:  Gil K. Dhawan Ph.D. P.E., Applied Membranes, Inc.


 Note:  Click Italicized Underlined words for product information.

Membrane Storage

  • Store membranes in a cool area out of direct sunlight.  Membrane storage temperature limits are 22F-113F (-5.5C to 45C)

  • Preserve in a solution of 2% AM-88 20% AM-225.  This will not prevent freezing below 32F, but the crystals are soft and the membrane is not damaged.

  • Keep new elements in original packaging.

  • Examine the preservative in preserved elements every 3 months.  If not clear, remove and re-preserve.  The pH of the preservative should not drop below 3.

  • Storage time for preserved elements is 6 months to 1 year.

  • Storage time for dry (new) elements is unlimited, and these can withstand temperatures below 22F.

Membrane Shipping

  • Preserve the element in the plastic bag using the recommended procedure.  Make sure the plastic bag does not leak and the element is properly identified.

  • Make sure the preservative solution is correctly labeled.

  • Protect the element package from physical damage.

System Shut-Down

  • Clean the membranes in the system using the cleaning procedure.

  • Circulate the preservative solution.

  • Shut down the system and close valves to prevent air entering the system.

  • Check preservative once a month.

 
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 What is RO Why RO RO & Water Chemistry Suspended Solids Membrane Fouling Bio. Growth on Mem. Fouling Solutions Correcting Fouling Membrane Disinfec. Mistakes to Avoid Pretreatment Seawater Desalination Activated Carbon Filtration Factors Affecting Perf. Achieving Brine Efficiency Using Pyrolox Media Residential Systems Oxygen

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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