Performance of the Pressure Assisted Forward Osmosis-MSF Hybrid Desalination Plant

An osmotically driven membrane process was proposed for seawater pretreatment in a multi-stage flashing (MSF) thermal plant. Brine reject from the MSF plant draw solution (DS) forward osmosis (FO) order to reduce chemical use. The purpose of FO is removal divalent ions prior desalination. In this study, at 80 g/L and 45 concentrations were used as brine seawater, respectively. temperature 40 °C 25 °C. Commercial thin-film composite (TFC) cellulose triacetate (CTA) membranes evaluated pressure-assisted (PAFO) processes. Experimental results showed 50% more permeation flux by increasing feed pressure 1 4 bar, reached 16.7 L/m2h PAFO with TFC compared 8.3 CTA membrane. experienced up 15% reduction after cleaning DI water while >6%. maximum recovery rate 11.5% 8.8% membrane, power consumption 0.06 kWh/m3 0.1