Record Display for the EPA National Library Catalog
RECORD NUMBER: 19 OF 21
|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.|
|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|
|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.