Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Screening/flotation treatment of combined sewer overflows /
Author Mason, Donald G.
Other Authors
Author Title of a Work
Gupta, Mahendra K.
Mason, Donald G.
CORP Author Rex Chainbelt, inc. Ecology Division.
Publisher U.S. Government Printing Office,
Year Published 1972
Report Number EPA11020-FDC-01/72; EPA/620-R-72-010
OCLC Number 00515631
Subjects Sewage--Purification. ; Flotation. ; Combined sewer overflows.
Internet Access
Description Access URL"; target="_blank
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 620-R-72-010 Headquarters Library/Washington,DC 04/11/2011
EJBD  EPA 620-R-72-010 Headquarters Library/Washington,DC 03/21/2014
ELBD RPS EPA 620-R-72-010 repository copy AWBERC Library/Cincinnati,OH 11/27/2018
ELBD  EPA 11020-FDC-01-72 AWBERC Library/Cincinnati,OH 11/04/2011
Collation viii, 172 pages : illustrations ; 28 cm.
"11020 FDC 01/72." "EPA/620-R-72-010." "January 1972." "Prepared for the Office of Research and Monitoring, Environmental Protection Agency under contract 14-12-40." Includes bibliographical references.
Contents Notes
The report documents a study to develop a treatment system for combined sewer overflows. The processes of chemical oxidation, screening, dissolved-air flotation, and disinfection were evaluated in the laboratory. A 5 MGD demonstration system was designed, installed and evaluated. Suspended solids and volatile suspended solids removal in the range of 65-80% were consistently obtained at influent concentrations of 150 to 600 mg/l. BOD and COD removals were slightly lower at 55 to 65% for influent concentrations of 50 to 500 mg/l. Addition of chemical flocculents (ferric chloride and a cationic polyelectrolyte) was necessary to obtain these removals. Without the use of chemical flocculents, removal of BOD, COD, suspended solids, and volatile suspended solids were all in the range of 40-50%. The screening flotation system provided sufficient detention time (difference 15 minutes) for adequate disinfection with hypochlorite salts. Cost estimates are presented.