Salt rejection at different operating times During the
During the long run of the dual-stage NF seawater softening, the overall salt rejection was also investigated in terms of conductivity and Nanaomycin A rejection, as shown in Fig. 13. It could be seen that the overall NF permeate conductivity and the salt rejection maintained less than 10 ms·cm− 1 and around 85%, respectively. It can also be seen that during the winter season, the conductivity of the raw seawater gradually increased.