Record Display for the EPA National Library Catalog


Main Title Recovery of lime and magnesium in potable water treatment
Author Thompson, C. G.
Other Authors
Author Title of a Work
Mooney, G. A.
CORP Author Johnson County Water District No. 1, Kans. ;Black, Crow and Eidsness, Inc., Montgomery, Ala.;Municipal Environmental Research Lab., Cincinnati, Ohio. Water Supply Research Div.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1976
Report Number EPA-600/2-76-285; EPA-S-803194-01-4
Stock Number PB-266 276
OCLC Number 15265558
Additional Subjects Water treatment ; Water softening ; Sludges ; Solid waste disposal ; Potable water ; Calcium oxides ; Surface waters ; Coagulation ; Flotation ; Design criteria ; Pilot plants ; Magnesium carbonates ; Materials recovery ; Calcium carbonates ; Economic analysis ; Cost analysis ; Performance evaluation ; Reclamation ; Separation ; Sediments ; Capitalized costs ; Operating costs ; Experimental design ; Tables(Data)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600/2-76-285 Headquarters Library/Washington,DC 03/31/2014
ELBD ARCHIVE EPA 600-2-76-285 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-2-76-285 AWBERC Library/Cincinnati,OH 02/11/2000
ESAD  EPA 600-2-76-285 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-266 276 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation ix, 119 p. : ill. ; 28 cm.
A hard, turbid surface water was successfully treated using the magnesium carbonate process in a 2 mgd pilot plant at the treatment works of Water District No. 1 of Johnson County, Kansas, for one year during 1975 and 1976. During this study, froth flotation was used to separate river sediments from calcium carbonate formed in the treatment process. Both bench-scale and pilot plant flotation tests have shown that sludges formed by softening turbid waters can be processed to yield a relatively pure calcium carbonate suitable for lime recovery. Prior to this work lime sludge from surface water treatment had not been useable for lime reclamation. Process variables affecting both magnesium carbonate recovery and calcium carbonate beneficiation were studied in this work. Magnesium carbonate was successfully produced on a continuous pilot scale from recycled magnesium bicarbonate liquor. Process economics were favorable. A comparison of capital and operating costs for magnesium carbonate treatment, sludge flotation and lime recovery with present operating costs, including waste disposal, indicated that annual costs would be lower with the new technology.
"December 1976." "EPA-600/2-76-285." Includes bibliographical references (p. 79-81).