Use of Improved Membranes in Tertiary Treatment by Reverse OsmosisBishop, H.K., McDonnell Douglas Corporation. Astropower Laboratory, United States. Environmental Protection Agency. Water Quality Office Water Quality Office, Environmental Protection Agency, 1970 - 67 páginas |
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Página 7
... filter and vacuum dried . Upon composite cellulose acetate batch analyses the acetyl content by weight was 39.7 percent . The hydroxyl content by weight was 3. 46 percent of which 37 percent was primary and 63 percent was secondary ...
... filter and vacuum dried . Upon composite cellulose acetate batch analyses the acetyl content by weight was 39.7 percent . The hydroxyl content by weight was 3. 46 percent of which 37 percent was primary and 63 percent was secondary ...
Página 21
... filter . Initially , a dis- posable plastic filter unit ( Nalgene No. 245 ) was used . However , increases in the COD value , attributed to preservatives in the filter , were observed . Subsequent filtering was done with a pressure filter ...
... filter . Initially , a dis- posable plastic filter unit ( Nalgene No. 245 ) was used . However , increases in the COD value , attributed to preservatives in the filter , were observed . Subsequent filtering was done with a pressure filter ...
Página 63
... filter . ( f ) TDS samples filtered through a 0. 45μ millipore filter . Table CVIII PERFORMANCE OF MEMBRANE SET 6 ( REGENERABLE UNIT 63.
... filter . ( f ) TDS samples filtered through a 0. 45μ millipore filter . Table CVIII PERFORMANCE OF MEMBRANE SET 6 ( REGENERABLE UNIT 63.
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30 minutes Adjusted to 77°F available cellulose acetate carbon treated secondary CARBON-TREATED SECONDARY EFFLUENT cellulose acetate membrane chemical oxygen demand Chloride commercially available cellulose concentrated primary effluent concentrated primary feed CONSTITUENTS DURING OPERATION enzyme-active laundry presoak feed tank filter Flushed for 30 gfd(a in-situ regenerable membrane initial levels laundry presoak solution McDonnell Douglas Corporation membrane cleaning MEMBRANE COEFFICIENT membrane reverse osmosis MEMBRANE SET 2a membrane surface membranes on carbon-treated MEMBRANES OPERATED mg/l as CaCO3 modified cellulose acetate OPERATED ON CARBON-TREATED Operated on Primary Percent Percent Percent Removal PERFORMANCE OF MEMBRANE Performance of Tubular prepared from transesterified Primary and Concentrated primary effluent feed product water flux pump regenerable membrane reverse REGENERABLE UNIT REMOVAL OF WASTEWATER reverse osmosis unit salt removal SET 2a OPERATED sponge ball sulfuric acid test results test unit treated secondary effluent Tubular Membrane Set tubular membranes prepared tubular units urea Wastewater Constituents water flux decline