Sustainability including renewable energy and green power, is one of the important feature in recent years due to
environmental constraints and the emission of CO2 from fossil fuel. Pressure retarded osmosis (PRO) process is
considered one of the effective technology for power generation. This study assessed the application of pressure
retarded osmosis to produce power from Tigris River water in Baghdad City, Iraq. Spiral wound TFC membrane
was tested in the PRO process with different variables. The effect of different types of draw solutions (MgCl2,
NaCl, Sodium Formate, KCl, Sodium Acetate), applied pressure (0 – 7 bar), and draw solution concentration
(0.08 and 0.4 M) were tested in this work. The flux, recovery, and power density for the five draw solution in the
order MgCl2 >NaCl>sodium formate>KCl>sodium acetate, while the reverse solute flux in the order MgCl2
