Chlorine resistant polysulfone reverse osmosis modules

Spiral wound reverse osmosis modules incorporating a highly chlorine resistant membrane have been developed for use in the purification of water. The modules exhibit >95% salt rejection with product flux rates of up to 55 gal/ft 2/day (gfd), at 400psi transmembrane pressure, 25°C, and with soften...

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Bibliographic Details
Published in:Desalination 1987, Vol.64, p.285-304
Main Authors: Allegrezza, A.E., Parekh, B.S., Parise, P.L., Swiniarski, E.J., White, J.L.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Membranes
Porous materials
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Summary:Spiral wound reverse osmosis modules incorporating a highly chlorine resistant membrane have been developed for use in the purification of water. The modules exhibit >95% salt rejection with product flux rates of up to 55 gal/ft 2/day (gfd), at 400psi transmembrane pressure, 25°C, and with softened feed water. The modules can be operated with high chlorine concentrations, i.e., continuous exposure to 5ppm free chlorine or intermittent exposure up to 100ppm free chlorine (pH range of 5.5–10). The modules have a pH operation range of 4–11, with excursions outside of this range allowable during cleaning procedures. Module field tests have shown good fouling resistance combined with excellent response to cleaning protocols. A summary of system costs is also included.
ISSN:0011-9164
1873-4464
DOI:10.1016/0011-9164(87)90103-2