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Applications for Chlorine Tolerant Membranes

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Industrial Water Systems

Industrial Water Systems often purify chlorinated tap water but typically remove the chlorine using expensive operations such as an activated carbon filtration step or metered addition of sodium metabisulfite. NALA Systems’ chlorine tolerant membranes can be used without the removal of chlorine and no risk of membrane damage. The chlorine in the water will protect NALA membranes from biofouling. NALA is developing membranes with high flux and high rejection for low TDS water conditions.

Municipal Water Systems

Municipal Water Systems often purify water that is loaded with organic matter greatly increasing the potential for biofouling, especially in warm weather. With appropriate pre-treatment to remove the bulk organic matter, NALAs' chlorine tolerant membranes can be used with added chlorine and no risk of membrane damage. The chlorine in the water will protect NALA membranes from biofouling. NALA is developing membranes with high flux and high rejection under both brackish water conditions and seawater conditions.

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Residential Water Systems

Residential Water Systems often purify chlorinate tap water but typically remove the chlorine using an expensive activated carbon filter cartridge. Membrane replacement is required very often in place of membrane cleaning in larger reverse osmosis systems. NALAs’ chlorine tolerant membranes can be used without the expensive carbon pre-filter and no risk of membrane damage. The chlorine in the water will protect NALA membranes from biofouling and extend the time between membrane replacements.

Wastewater Treatment Systems

Wastewater Treatment Systems often struggle to use reverse osmosis due to the presence of high levels of organic contaminants that damage and/or foul the RO membranes. NALAs' chemically resistant membranes resist organic foulants and stand up to aggressive chemicals.

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Water Samples

Unique Contaminants and Operating Conditions

Unique Contaminants and Operating Conditions that are unsuitable for most reverse osmosis membranes may be effective using NALA membranes because our membranes are made from a new patented polymer that is highly chemically and thermally stable. At NALA Membranes we are exploring potential contaminant separation opportunities with some examples shown here:

  • Free Chlorine

  • Wide range of pH

  • Wide range of temperatures

  • Urea and other amines and amides

  • Boron

  • PFAS

  • Arsenic

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