Forward-Reverse Osmosis Processes for Oily Wastewater Treatment

In this study, the feasibility of Forward–Reverse osmosis processes was investigated for treating oily wastewater. The first stage applied forward process to recover pure water from Sodium chloride (NaCl) and magnesium (MgCl2) salts were used as draw solutions membrane that in (FO) cellulose triacetate (CTA) membrane. operating parameters studied were: solution concentrations (0.25 – 0.75 M), oil concentration feed (FS) (100-1000 ppm), temperature FS (DS) (30 - 45 °C), pH (4-10) flow rate both DS (20 60 l/h). It found flux increase by increasing solutions, a limit (40oC), then, decrease with because happening internal polarization phenomenon. By DS, decreased, while it had fluctuated behavior pHof also MgCl2 gives higher than NaCl. So values resistance solute diffusion within porous support layer 55.93 h/m 26.21 NaCl respectively. second reverse using polyamide (thin film composite (TFC)) separating fresh diluted different such (0.08–0.16 (20–40