Record Display for the EPA National Library Catalog

RECORD NUMBER: 32 OF 39

OLS Field Name OLS Field Data
Main Title Slow sand filter maintenance costs and effects on water quality /
Author Letterman, Raymond D. ; Cullen, T. R.
Other Authors
Author Title of a Work
Cullen, Thomas R.
CORP Author Syracuse Univ., NY.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher GPO,
Year Published 1985
Report Number EPA/600/2-85/056
Stock Number PB85-199669
Subjects Water--Purification--Filtration. ; Water quality--New York (State) ; Water treatment plants--New York (State)
Additional Subjects Sand filters ; Water treatment ; Water pollution ; Maintenance ; Cost analysis ; Operating costs ; Pilot plants ; Monitoring ; Deterioration ; Turbidity ; Particles ; Removal ; Sands ; Scraping
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB85-199669 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 124 pages : illustrations
Abstract
A study was conducted to determine how slow sand filter effluent quality is affected by scraping and to quantify the labor required to operate and maintain a slow sand filter. The data were obtained by monitoring scraping and other maintenance operations at six full-size slow sand filtration plants in Central New York. The time required for filtrate quality to improve after filter scraping varied from 6 hr to 2 weeks at the slow sand filtration plants visited. In four of ten maintenance operations some quality deterioration occurred. The nature of the particulate matter in raw water apparently has an important effect on filtrate quality, and a pilot plant study should always be conducted before a slow sand filtration plant is constructed. Continuous monitoring of the turbidity of each filter effluent may be needed to determine if filter maintenance operations have a detrimental effect on treated water quality.
Notes
"Final report 6/83-12/84." "May 1985." "EPA/600/2-85/056."