The membranes were investigated at 10 bar of applied pressure
during 6 h of operation. Before the set-up of the experiment, membranes
were soaked in the ultrapure water for 24 h for conditioning.
The permeate samples were collected after each 30 min in the initial
2 h period and after each 2 h for the last 4 h period. During sampling,
the permeate flow rate was also measured. The concentrate flow rate
was maintained constant as 96 L/h during the experiment. This value