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Removing Giardia Cysts From Low Turbidity Waters by Rapid Rate Filtration
Author(s) -
AlAni Mohammed Y.,
Hendricks David W.,
Logsdon Gary S.,
Hibler Charles P.
Publication year - 1986
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1986.tb05746.x
Subject(s) - turbidity , giardia , filtration (mathematics) , environmental science , coagulation , water treatment , environmental engineering , environmental chemistry , biology , chemistry , microbiology and biotechnology , ecology , mathematics , medicine , statistics , psychiatry
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, 99.9, 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 <1 ntu, percent reduction of turbidity can serve as a surrogate indicator of the removal of Giardia cysts.