Nanofiltration(NF) Membrane Sheet

Nanofiltration Membrane Sheet
Core positioning: "selective separation" membrane, between ultrafiltration and reverse osmosis, focusing on "partial desalination + retaining beneficial components".

Key features:
The separation mechanism is special: it is mainly based on "sieving effect + charge repulsion", with a high rejection rate (70%~99%) for divalent ions (Ca²⁺, Mg²⁺) and a low rejection rate (20%~70%) for monovalent ions (Na⁺, Cl⁻);
It can intercept small molecular organic matter (molecular weight 200~1000Da), such as antibiotics, pigments, and pesticide residues, but retain minerals (such as potassium and magnesium);
The operating pressure is low (0.3~2.0MPa), and the energy consumption is only 50%~70% of reverse osmosis.
Scene adaptation: drinking water softening (removing calcium and magnesium ions, preventing scale), fruit juice concentration (retaining vitamins, removing sugar), pharmaceutical intermediate purification (trapping impurities, retaining active ingredients), groundwater nitrate/fluoride removal.