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Removing Giardia Cysts and Other Particles From Low Turbidity Waters Using Dual‐Stage Filtration
Dual‐stage filtration (DSF) in packaged form is a good alternative to conventional rapid‐rate filtration for small utilities. The purpose of the study described in this article was to test the effectiveness of DSF for removing Giardia cysts from low turbidity (<;1 ntu), low temperature (near 32°F [0°C]) water. Removals of total coliform bacteria and turbidity were also determined. Two different water sources were tested, with runs up to 35 h in length. Dual‐stage filtration removed >;99 percent of Giardia cysts from waters with a turbidity of <;1 ntu and a temperature of <;46°F (<;8°C), when proper chemical treatment was applied and the system was operated at 10 gpm/sq ft (6.8 mm/s) or less. Removal of total coliform bacteria exceeded 98 percent, and removal of turbidity exceeded 90 percent.
Removing Giardia Cysts and Other Particles From Low Turbidity Waters Using Dual‐Stage Filtration
Dual‐stage filtration (DSF) in packaged form is a good alternative to conventional rapid‐rate filtration for small utilities. The purpose of the study described in this article was to test the effectiveness of DSF for removing Giardia cysts from low turbidity (<;1 ntu), low temperature (near 32°F [0°C]) water. Removals of total coliform bacteria and turbidity were also determined. Two different water sources were tested, with runs up to 35 h in length. Dual‐stage filtration removed >;99 percent of Giardia cysts from waters with a turbidity of <;1 ntu and a temperature of <;46°F (<;8°C), when proper chemical treatment was applied and the system was operated at 10 gpm/sq ft (6.8 mm/s) or less. Removal of total coliform bacteria exceeded 98 percent, and removal of turbidity exceeded 90 percent.
Removing Giardia Cysts and Other Particles From Low Turbidity Waters Using Dual‐Stage Filtration
Horn, James B. (author) / Hendricks, David W. (author) / Scanlan, John M. (author) / Rozelle, Lee T. (author) / Trnka, Walter C. (author)
Journal ‐ American Water Works Association ; 80 ; 68-77
1988-02-01
10 pages
Article (Journal)
Electronic Resource
English
Giardia , Turbidity , Bacteria , Filtration , Water Treatment , Coliforms
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