Nanofiltration (0.001μ – 0.01μ)
Nanofiltration or NF membranes are essentially “loose” reverse osmosis membranes. These semi-permeable membranes are constructed of materials such as sulfonated sulfone, polyamides, and other thin film composites. NF membranes can be used to remove organics and many dissolved materials such as hardness. NF membranes are often used in wastewater treatment to remove BOD. NF can also be used as pretreatment to our spiral RO system; the permeate from a nanofiltration membrane is a “soft” water. Our NF membranes operate at pressures from 200 to 600 psi (~14 to ~41 bar) and can withstand a range of pH’s from 1 to 14.