Equations and algorithm for Reverse Osmosis membranes comparison
Reverse Osmosis and Nanofiltration membrane datasheets specifications are good for evaluating the quality of the delivered products but almost useless to compare products performance. The main reason for that is that every membrane was tested under different conditions (pressure, salinity, solution composition, recovery, pH and temperature).
Water mass transport coefficient (A-Value) and Salt mass transport coefficient (B-value)
RO and NF membranes can be defined by two parameters known in the industry as A and B-values.