Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Slow sand filter and package treatment plan evaluation : operating costs and removal of bacteria, giardia, and trihalomethanes /
Author Pyper, Gordon Richardson.
CORP Author Dufresne-Henry, Inc., North Springfield, VT.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher GPO,
Year Published 1985
Report Number EPA/600/2-85/052
Stock Number PB85-197051
OCLC Number 48167919
Subjects Water treatment plants. ; Diatomaceous earth. ; Giardia. ; Water--Purification--Filtration
Additional Subjects Operating costs ; Packaged sewage plants ; Sand filters ; Water treatment ; Performance evaluation ; Giardia ; Cysts ; Turbidity ; Municipalities ; Halogen organic compounds ; Methanes
Library Call Number Additional Info Location Last
NTIS  PB85-197051 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 198 pages : illustrations
A two-year study was conducted on a municipally owned operating slow sand filter and a pressure diatomaceous earth (DE) filter, using the same source of supply. The systems were compared by monitoring ambient turbidity, particle county, total coliform, and standard plate count bacteria in the influent and filtered water as well as bacterial and Giardia cyst spikes. Both methods of treatment were comparable in effectiveness for most parameters. Turbidity removal tended to be better in the slow sand filter treatment than in the DE except for the period of time following slow sand filter scraping. Particle reduction tended to be very erratic in both systems for this particular source water.
"Final report 9/81 - 3/85." "April 1985." "EPA/600/2-85/052." Microfiche.