Abstract
The effect of feed water flow rate on the concentration-polarization of magnesium sulfate, sodium chloride, and sodium selenate in reverse osmosis (RO) spiral-wound elements was investigated and modeled. Experiments were performed with 40 in. long and 2.5 in. in diameter spiral-wound elements tested with feed solutions of the single electrolyte magnesium sulfate, and a mixture of sodium chloride and sodium selenate as major and trace components respectively. The feed flow rates investigated ranged from 1.12 to 13.5 L/min, corresponding to Reynolds numbers from 25 to 300. The element was modeled by dividing it into \in identical subelements, each separated into two compartments, feed channel and product water carrier, by the RO membrane. The feed channel compartment of each subelement was assumed to be an ideal continuous-flow stirred tank reactor (CSTR). Model predictions correlated generally well with experimental observations. Predicted product water flow rates and solute concentrations were within 12 and 24% respectively, of corresponding experimental values.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
