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Nanofiltration is a pressure driven membrane process with performance characteristics between reverse osmosis and ultrafiltration. Nanofiltration membranes reject large molecules, and is an excellent energy savings process over reverse osmosis for purifying well water and surface water up to 2000 TDS where the high salt content is due to divalent ions.
Examples of NF Applications
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Application
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Permeate
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Concentrate
(Retentate)
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Benefits of NF
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Whey / Whey Permeate
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Salty wastewater
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Desalted whey concentrate
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Allows the recovery of lactose and whey protein concentrate with reduced salt content
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Textile
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Dyes
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Water, salts, BOD, COD and color
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NF is used to desalt dyes resulting in a higher value product
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Caustic cleaning solutions
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Caustic cleaning solution
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BOD, COD, SS, caustic cleaner
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Allows caustic cleaning solution to be recycled resulting in reduced cleaning chemical costs
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Recycle of acid solutions
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Acid solution
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BOD, COD, SS, calcium, acidic water
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Allows acid solution to be recycled resulting in reduced cleaning chemical costs
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Water
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Softened water
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Hard water
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Potable water production. Softened water reduces scaling on equipment and heat exchange surfaces
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Antibiotics
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Salty waste product
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Desalted, concentrated Antibiotics
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NF produces high value pharmaceutical products
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Call A.B.E. first! We want to help you choose the most effective solution for your application.
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Nanofiltration