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Rotating reverse osmosis: a dynamic model for flux and rejectionReverse osmosis (RO) is a compact process for the removal of ionic and organic pollutants from contaminated water. However, flux decline and rejection deterioration due to concentration polarization and membrane fouling hinders the application of RO technology. In this study, a rotating cylindrical RO membrane is theoretically investigated as a novel method to reduce polarization and fouling. A dynamic model based on RO membrane transport incorporating concentration polarization is used to predict the performance of rotating RO system. Operating parameters such as rotational speed and transmembrane pressure play an important role in determining the flux and rejection in rotating RO. For a given geometry, a rotational speed sufficient to generate Taylor vortices in the annulus is essential to maintain high flux as well as high rejection. The flux and rejection were calculated for wide range of operating pressures and rotational speeds. c 2001 Elsevier Science B.V. All rights reserved.
Document ID
20040088592
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Lee, S.
(Northwestern University Evanston, IL 60208, United States)
Lueptow, R. M.
Date Acquired
August 21, 2013
Publication Date
October 15, 2001
Publication Information
Publication: Journal of membrane science
Volume: 192
Issue: 2
ISSN: 0376-7388
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAG9-1053
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Life Support Systems

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