Record Display for the EPA National Library Catalog


Main Title Feasibility of recovering useful salts from irrigation wastewater concentrates produced by power plant cooling /
Author Sephton, Hugo H.
CORP Author California Univ., Berkeley. Sea Water Conversion Lab.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory ; National Technical Information Service [distributor],
Year Published 1980
Report Number EPA-600/7-80-047; R804760
Stock Number PB80-187966
OCLC Number 07046671
Subjects Salts. ; Crystallization. ; Water--Pollution--United States.
Additional Subjects Waste water ; Brines ; Water pollution control ; Inorganic salts ; Materials recovery ; Feasibility ; Sodium sulfates ; Calcium sulfates ; Electric power plants ; Agricultural wastes ; Irrigation ; Evaporation ; Crystallization ; Ion exchanging ; Pilot plants ; Cost analysis ; Design ; Process charting ; Cooling towers ; Wind tunnels ; Field tests
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-7-80-047 Headquarters Library/Washington,DC 06/15/2011
EJBD  EPA 600-7-80-047 Headquarters Library/Washington,DC 03/29/2016
ELBD  EPA 600-7-80-047 AWBERC Library/Cincinnati,OH 10/30/2018
ERAD  EPA 600/7-80-047 Region 9 Library/San Francisco,CA 02/19/2013
ESAD  EPA 600-7-80-047 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-187966 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation iv, 38 pages : illustrations ; 28 cm.
The report evaluates the feasibility of a novel energy-conserving way to recover useful salts (sodium sulfate and calcium sulfate) from concentrated brines by evaporation/crystallization. The concentrated brines examined were cooling tower blowdown from agricultural wastewater and this blowdown after further concentration and use in ion exchange regeneration. Laboratory and pilot tests were made with both conventional evaporation/crystallization and interface-enhanced, vertical-tube foam evaporation which increases evaporation. Sodium sulfate and calcium sulfate recovery provides potential capital cost savings, about $2 million for a 1000-MWe power plant. Sale of these products is an added incentive to their recovery. The use of foamy vapor/liquid flow on the evaporating brine/crystal slurry enhanced heat transfer by up to 40% and enabled concurrent energy reductions of 28%, compared to conventional evaporation/crystallization of sodium sulfate in a 5000-gpd vapor-compression vertical-tube evaporation pilot plant. Consequently, the use of agricultural wastewater for power plant cooling in the San Joaquin Valley with ion exchange for pre-softening and wastewater regeneration solely with concentrated brine from blowdown appears technically feasible and economically attractive.
"The University of California, Sea Water Conversion Laboratory." "March 1980." Includes bibliographical references. "Grant no. R804760, program element no. INE827."