What are factors that affect nanofiltration membrane performance?

The four main factors are: feedwater salt concentration, pressure, temperature, and recovery.

Nanofiltration (NF) is a membrane technology for liquid separation. Although in many ways similar to reverse osmosis (RO), NF rejects multivalent ions such as calcium, while permitting most monovalent ions, like chloride, for example. RO, on the other hand, rejects virtually all dissolved solutes.

Feedwater salt concentration is a reference to the level of dissolved salt in water. Recovery is the amount of water which the membrane permeates, denoted in per unit time—typically in gallons per minute (GPM). The recovery rate will vary with the chemistry of the feedwater.

Nanofiltration efficiency is also affected by fouling and other factors like tangential velocity, turbulence, and feedwater particle size.

How could nanofiltration serve the treatment requirements of your liquid process?