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water treatment plantmedina county sanitary engineersMembranes bring about the splitting up. Nanofiltration membranes have a moderate retention for univalent salts. Nanofiltration system have pores with a size of roughly 1nm. Nanofiltration system are qualified based upon their retention of loaded and unloaded fragments. The retention of a Nanofiltration membrane can be identified through speculative filtering examinations with pre-selected molecules. A NF system is also ion-selective. 7. OUR APPLICATION. Ceramic. Chemicals. Dairy. Food & Beverages. Anion resin must have the firmness gotten rid of from the influent water to stop solidity fouling. The Cation resin is regenerated with acid (hydrochloric or sulfuric) as well as the Anion resin is restored with sodium hydroxide (caustic soda). Two Bed Demineralizers usually generate water quality in the range of 50,000 ohms up to 200,000 ohms resistivity, which is between 8. 5 and 2. 0 ppm TDS as CaCO3. Automatic combined deionizers use the exact same resins but blend both materials for usage.