Record Display for the EPA National Library Catalog

RECORD NUMBER: 38 OF 53

OLS Field Name OLS Field Data
Main Title Membrane Materials for Wastewater Reclamation by Reverse Osmosis.
Author Dougla, A. S. ; Tagam, M. ; Milstea, C. E. ;
CORP Author Gulf General Atomic, Inc., San Diego, Calif.
Year Published 1970
Report Number FWQA-14-12-452; FWQA-17040-EFO; 04185,; 17040-EFO-06/70
Stock Number PB-197 448
Additional Subjects ( Sewage treatment ; Osmosis) ; ( Membranes ; Osmosis) ; ( Cellulose acetate ; Membranes) ; ( Water reclamation ; Osmosis) ; Chemical removal(Sewage treatment) ; Demineralizing ; Polyurethane resins ; Polyelectrolytes ; Pyrrolidines ; Tests ; Reverse osmosis ; Tertiary sewage treatment ; Polyvinyl pyrrolidone
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-197 448 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 75p
Abstract
An experimental program was carried out to evaluate potential reverse osmosis membranes for the tertiary treatment of secondary sewage effluent. The evaluation program consisted of both direct osmosis and reverse osmosis tests on various membranes using both single solutes and secondary effluent. The types of membranes tested were polyurethane latices, cellulose diacetate, cellulose 2.5-acetate, polyvinylpyrrolidone (PVP)-polyisocyanate interpolymers, and polyelectrolytes. The cellulose diacetate, polyurethane latices, and PVP membranes were not suitable for waste-water treatment. Although rejection of most solutes by PVP membranes was quite good for dense, homogeneous membranes, high-flux, asymmetric membranes had poor rejection characteristics. Very-high flux membranes were prepared from polyacrylic acid cast onto cellulose nitrate, cellulose nitrate-cellulose acetate, and polysulfone porous supports. The best combination of high flux and rejection was obtained wtih asymmetric cellulose 2.5-acetate membranes heat-treated in water at 55 to 70C. (Author)