Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Improved liquid-solids separation by an aluminum compound in activated sludge treatment /
Author Lenhart, Charles F.
Other Authors
Author Title of a Work
Cagle, Joseph W.
CORP Author Greene County Board of Commissioners, Ohio.;Municipal Environmental Research Lab., Cincinnati, Ohio. Wastewater Research Div.;Nalco Chemical Co., Chicago, Ill.
Publisher U.S. G.P.O.,
Year Published 1975
Report Number EPA-600/2-75-039; EPA-17030-EBH
Stock Number PB-248 228
OCLC Number 02138899
Subjects Sewage--Purification. ; Separation (Technology) ; Sewage--Activated sludge process
Additional Subjects Sewage treatment ; Activated sludge process ; Pilot plants ; Sodium inorganic compounds ; Aluminates ; Precipitation(Chemistry) ; Alums ; Chemical removal(Sewage treatment) ; Biochemical oxygen demand ; Sludge digestion ; Phosphorus ; Cost estimates ; Sodium aluminates
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-75-039 Headquarters Library/Washington,DC 08/29/2011
EJBD  EPA 600-2-75-039 c.1 Headquarters Library/Washington,DC 08/16/2013
EKAM  TD756.L45 Region 4 Library/Atlanta,GA 09/15/1995
ELBD  EPA 600-2-75-039 AWBERC Library/Cincinnati,OH 11/20/1998
ESAD  EPA 600-2-75-039 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-248 228 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation viii, 60 pages : illustrations ; 27 cm.
This study demonstrates that feeding liquid alkaline alumina, identified as sodium aluminate, to a small to medium (2.5 million gal per day) activated sludge wastewater treatment plant is a practical method of gaining several operational benefits. Specific benefits were found in the areas of solids handling and ease of sludge volume index control. Additional benefit was noted in the concentration of aerobically digested solids, particularly in cold weather. Reduction of suspended solids carryout of secondary clarifiers resulted from the sodium aluminate feed, reducing the loading to the tertiary treatment unit. Phosphorus removal in amounts approaching 80% were achieved with feed rates of 10 mg/liter as Al to the aeration basins. The cost of alkaline alumina addition was 2.6 cents per 1000 gallons of raw wastewater flow.
"Project no. 17030 EHB." Includes bibliographical references (page 59).