Feasibility of Nanofiltration process in dual stage in desalination of the seawater

Abstract

The main objective of this paper is to predict the performances of NF membranes for seawater desalination utilizing a two. ROSA software was used in this study to verify the applicability of the NF in dual stage desalination process. Similarly to dual stage NF desalination process, an NF membrane was used in the first stage and BW membrane in the second stage.The first stage includes a nanofiltration membrane, but the second includes a nanofiltration or reverse osmosis (BW) membranes in order to produce potable water (TDS less than 1000mg/l). The effect of membranes type and seawater salinity is examined to achieve our objective. The results of energy requirements of NF-NF and NF-BW were eventually compared to single stage RO desalination in order to estimate the effectiveness of process. Keywords: Nanofiltration, Reverse osmosis, Desalination, Rosa software, Dual stage.