Record Display for the EPA National Library Catalog

RECORD NUMBER: 35 OF 80

OLS Field Name OLS Field Data
Main Title New and Ultrathin Membranes for Municipal Wastewater Treatment by Reverse Osmosis.
Author Rozell, L. T. ; Scattergoo, E. M. ; Nelso, B. R. ; Cadott, J. E. ;
CORP Author North Star Research and Development Inst., Minneapolis, Minn.
Year Published 1970
Report Number DI-14-12-587; EPA-WQO-17020-EFA; 11372,; 17020-EFA-10/70
Stock Number PB-202 237
Additional Subjects ( Sewage treatment ; Osmosis) ; ( Membranes ; Osmosis) ; Cellulosic resins ; Sulfonic acids ; Performance evaluation ; Reverse osmosis ; Tertiary sewage treatment
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-202 237 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 65p
Abstract
A series of new and ultrathin membranes with thicknesses from 250 to 5000 angstroms and consisting of various polysaccharide mixed esters and ethers were tested on microporous supporting films for improved reverse osmosis treatment of municipal wastewaters. From the screening studies with secondary effluent, ultrathin membranes prepared from two polymers (out of a total of 44) looked very promising: cellulose methyl sulfonate O-propyl sulfonic acid (CMSOPSA) and cellulose acetate O-propyl sulfonic acid (CAOPSA). Long-term (150 hours) testing of the CMSOPSA membrane with secondary effluent resulted in an average water flux of 34 to 36 gfd over the last 100 hours, and rejections of 96 percent for total dissolved solids, 94 percent for ammonia, and 83 percent for total organic carbon. Preliminary membrane optimization studies showed that the reverse osmosis properties of these new membranes could be improved by closely controlling the polymer preparation procedures and the casting and annealing conditions. A preliminary economic analysis was conducted.