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OLS Field Name OLS Field Data
Main Title Evaluation of an activated sludge secondary clarifier distributed inlet /
Author Semon, J. A.
CORP Author Stamford Water Pollution Control Facility, CT.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher Water Engineering Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1987
Report Number EPA/600/2-87/012; EPA-R-810261
Stock Number PB87-152443
Additional Subjects Waste water ; Activated sludge process ; Waste treatment ; Water pollution control
Library Call Number Additional Info Location Last
NTIS  PB87-152443 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 70 pages ; 28 cm
Abstract Secondary clarifiers are crucial to the overall performance of the activated sludge process. Research over the last 40 years indicates that density currents are factors which degrade clarifier performance when not considered in design. However, present designs of most center-feed, peripheral overflow clarifiers fail to adequately control these influences. The document summarizes the results of a full-scale demonstration project which evaluated a unique inlet designed to distribute flow in this type of secondary clarifier equally both horizontally and vertically and prevent the formation of density currents. The inlet failed to create the expected uniformly distributed flow or improve the clarifier's performance.
Notes "January 1987." Microfiche.
Place Published Cincinnati, OH :
Supplementary Notes Sponsored by Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
PUB Date Free Form 1987.
NTIS Prices PC A04/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20020111171719
Language eng
Origin NTIS
OCLC Rec Leader 00837nam 2200217Ka 45020