Record Display for the EPA National Library Catalog

RECORD NUMBER: 431 OF 683

OLS Field Name OLS Field Data
Main Title Pilot plant evaluation of alternative activated sludge systems /
Author Heidman, James A.
CORP Author District of Columbia Dept. of Environmental Services, Washington. EPA-DC Pilot Plant.;Municipal Environmental Research Lab., Cincinnati, Ohio.
Publisher Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; For sale by the National Technical Information Service,
Year Published 1977
Report Number EPA/600/2-77/108; EPA-68-03-0349
Stock Number PB-272 758
OCLC Number 35264086
Subjects Sewage--Purification--Activated sludge process. ; Water treatment plants--United States.
Additional Subjects Activated sludge process ; Sewage treatment ; Combined sewers ; Substitutes ; Pilot plants ; Performance evaluation ; Tables(Data) ; Design criteria ; Process charting ; Biochemical oxygen demand ; Plug flow reactors
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9100SQ0F.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 600-2-77-108 Headquarters Library/Washington,DC 10/25/2011
EJBD  EPA 600-2-77-108 c.1 Headquarters Library/Washington,DC 03/26/2014
EKAM  600/2-77/108 Region 4 Library/Atlanta,GA 11/20/1998
ELBD RPS EPA 600-2-77-108 repository copy AWBERC Library/Cincinnati,OH 10/17/2014
ESAD  EPA 600-2-77-108 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-272 758 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation xii, 157 p. : ill. ; 28 cm.
Abstract
Step feed, plug flow and complete mix activated sludge systems were compared on a pilot plant scale under similar operating conditions with the same municipal wastewater. The process loading to each system was varied over a wide range during the course of the investigation. Extended periods of steady state operation at constant flow provided extensive data on effluent quality, sludge yield, settling characteristics, etc. at several fixed F/M loadings for each of the system configurations. All systems demonstrated that the variability in carbonaceous effluent quality was mostly influenced by the suspended solids concentrations in the effluent over a wide range of process loadings. Sludge production was the same within experimental error in all systems at comparable SRT's. Analysis of the aggregate data from all systems produced a yield coefficient of 0.79 g VSS/g BOD5 applied and a decay coefficient of 0.064/day. The sludge from the complete mix system exhibited the poorest settling characteristics. A step feed system was found to offer the best physical arrangement for secondary treatment of District of Columbia wastewater.
Notes
Includes bibliographical references (p. 154-157).