STUDIES ON CONCENTRATION POLARIZATION FOR PURIFICATION OF SALINE WATER USING SPIRAL WOUND REVERSE OSMOSIS MODULE

In this work the experimental studies were carried out to predict the performance of spiral wound reverse osmosis system. Experiments were conducted on laboratory scale spiral wound reverse osmosis module taking sodium chloride as a solute. The objective of this work is to study the effects of varying operating conditions such as feed pressure, feed concentration and feed flow rate on concentration polarization. The simplified form of solution diffusion model has been used to find the model transport parameters such as mass transfer coefficient and diffusivity. Observations indicated that as the feed pressure increases the mass transfer coefficient also increases and thus the concentration polarization decreases.