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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30 minutes Adjusted to 77°F approximately Average calculated carbon treated secondary CARBON-TREATED SECONDARY EFFLUENT casting changes Chloride cleaning COEFFICIENT concentrated primary effluent Conductivity correction determined enzyme-active laundry presoak evaluate feasibility feed tank Figure filter flow Flushed for 30 flux decline further development groups hydroxyl groups in-situ regenerable membrane indicate initial levels laundry presoak solution maintained material measured mg/l modified cellulose acetate Office OPERATED ON CARBON-TREATED Operated on Primary organic Percent Removal Performance of Tubular plot porous prepared from transesterified presented pressure Primary and Concentrated primary effluent feed product water flux properties psig pump RECYCLE REGENERABLE UNIT Removal Percent Report Returned reverse osmosis samples Set 2a Stage Table temperature test results Total Solids treated secondary effluent treatment tube Tubular Membrane Set tubular membranes prepared tubular units urea Values waste water Wastewater Constituents
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Página ii - US Environmental Protection Agency, and approved for publication. Approval does not signify that the contents necessarily reflect the views and policies of the US Environmental Protection Agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use.
Página 21 - ... in the twelfth edition of "Standard Methods for the Examination of Water and Waste Waters...
Página 66 - TO! WATER RESOURCES SCIENTIFIC INFORMATION CENTER US DEPARTMENT OF THE INTERIOR WASHINGTON. DC 20240...
Página 19 - The field test unit was operated continuously for 24 hours a day and 7 days a week throughout the tests. Operating pressure was maintained at 600 psig. The flow rate through the reverse osmosis unit was maintained at 12 gallons per minute.
Página 4 - Basic elements of the reverse osmosis process consist of the membrane, a means for providing a high-pressure differential across the membrane, and a support for the membrane against this pressure differential. To meet these requirements various geometries have evolved, including circular flat-plate membrane stacks contained within cylindrical pres sure vessels, tubular membranes contained within porous tubes, and flat membrane sheets spirally wound.
Página 4 - A number of different membrane materials possess the favorable osmotic properties of relatively high product water flux and low or no solute trans port.
Página 21 - Total chemical oxygen demand (COD) was determined by potassium dichromate-sulfuric acid digestion for two hours and ferrous ammonium sulfate titration to the ferroin indicator endpoint; any chloride present in the sample was complexed with mercuric sulfate.
Página 4 - Treatment processes incorporating reverse osmosis may be capable of performing a much superior treatment in fewer operations; dissolved salts, organic substances, and insoluble suspended matter are all removed in the same operation.