Mass Transfer in Rotating Reverse Osmosis Based on Couette-Taylor Flow
نویسندگان
چکیده
Reverse Osmosis (RO) is an efficient process for the removal of ionic and organic pollutants from wastewater. However, flux decline and rejection deterioration due to concentration polarization and membrane fouling hinders the application of RO technology. Rotating RO takes advantage of high shear and the Taylor vortex instability to reduce the flux decline related to concentration polarization and membrane fouling. This process was investigated as a novel method for wastewater recovery. The mass transfer coefficient in rotating RO was experimentally determined based on film theory. A model developed for rotating RO allowed the prediction of flux and pollutant rejection over a wide range of design and operational parameters. The model matches the experimental results from a labscale rotating RO system very well. According to the model, rotating RO shows better flux and rejection than a non-rotating system by effectively reducing concentration polarization.
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