Record Display for the EPA National Library Catalog
RECORD NUMBER: 19 OF 28
|OLS Field Name||OLS Field Data|
|Main Title||Removing 'Giardia' Cysts from Low Turbidity Waters by Rapid Rate Filtration.|
|Author||Al-Ani, M. Y. ; Hendricks, D. W. ; Logsdon, G. S. ; Hibler, C. P. ;|
|CORP Author||Colorado State Univ., Fort Collins.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.|
|Additional Subjects||Giardia ; Membranes ; Filtration ; Water treatment ; La Pondre River ; Pilot plants ; Turbidity ; Coliform bacteria ; Coagulation ; Dosage ; Bacteria ; Diatomaceous earth ; Flocculating ; Sedimentation ; Cysts ; Removal ; Efficiency ; Reprints ; Pre-treatment water|
Pilot-plant studies showed that when effective chemical pretreatment is employed in combination with rapid rate filtration, removals of turbidity, total coliform bacteria, and Giardia cysts from low turbidity waters may be greater than 80 and 99.9 percent, respectively. Proper coagulation, however, requires the careful selection of chemicals and dosages. It was also observed that for waters having turbidity levels less than 1ntu, percent reduction of turbidity can serve as a surrogate indicator of the removal of Giardia cysts.