Nanofiltration (NF) Systems

Nanofiltration systems utilise semi-permeable membranes with molecular weight cut-offs between 200-1000 Daltons, providing selective separation capabilities that bridge the gap between ultrafiltration and reverse osmosis. The technology excels at removing organic molecules, divalent ions, and colour compounds while allowing monovalent salts to pass through partially. Operating pressures range from 75-300 psi, significantly lower than RO systems, resulting in reduced energy consumption and operational costs. The selective nature of NF membranes makes them particularly valuable in applications requiring specific contaminant removal while preserving water’s natural mineral content. Advanced spiral-wound membrane configurations maximise surface area and minimise fouling potential, while innovative cleaning protocols maintain long-term performance. Control systems monitor key parameters including colour units, conductivity, and differential pressure to optimise operation and predict maintenance requirements.