Nanofiltration (NF) TS80 and XN45 Membrane elements

TriSep offers two different nanofiltration (NF) membrane chemistries, the TS80 and the XN45. Both are based on proprietary and patented technology developed by DuPont. The unique chemistries of these membranes allow them to have lower organic fouling than standard '344 type NF membranes. The TS80 is typically used in municipal membrane softening applications. It has a higher relative sodium chloride rejection (~90%) than the XN45 (~30%). The TS80, or its higher flow cousins, the TS82 and TS83, are excellent choices to remove THM precursors, color, iron, and hardness from surface and well waters. The XN45 is typically used in process application where there is a desire to allow monovalent ions to pass through the membrane will rejecting divalent ions or low molecular weight organic molecules such as sugars. NF is a membrane process which can be applied to the treatment of a variety of water supplies with many economic and process advantages.

NF membranes typically have lower salt (NaCl) rejection than reverse osmosis membranes, but have higher specific flux rates and can, therefore, operate at lower feed pressures. NF membranes have the inherent ability to reject or separate different feed species, specifically: particulates, colloidal and microbiological species, hardness, sulfate and other multivalent ions, and soluble low molecular weight (> 200 Daltons) neutral and charged organic compounds.