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RECORD NUMBER: 1 OF 5

OLS Field Name OLS Field Data
Main Title Evaluating Sedimentation and Various Filter Media for Removal of 'Giardia' Cysts.
Author Logsdon, G. S. ; Thurman, V. C. ; Frindt, E. S. ; Stoecker, J. G. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div. ;Cincinnati Univ., OH. Coll. of Engineering.
Year Published 1985
Report Number EPA/600/J-85/009;
Stock Number PB85-176576
Additional Subjects Antracite ; Sedimentation ; Giardia ; Water pollution control ; Cysts ; Performance evaluation ; Bacteria ; Alums ; Concentration(Composition) ; Effectiveness ; Filter ; Turbidity ; Reprints ; Giardia cysts
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB85-176576 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 8p
Abstract
The primary purpose of the pilot study described in this article was to evaluate the efficiency of sedimentation and of coarse anthracite media for removing Giardia cysts. Removal of cysts by sedimentation was observed to range from 65 to 93 percent and was generally similar to removal of turbidity. The coarse anthracite media produced water of inferior quality when alum was the only coagulant, but its performance was found to be improved by the use of a high-molecular-weight, slightly anionic polymer. Cyst concentrations appeared to be higher than usual during the initial phase of a filter run, indicating that a filter-to waste period may be desirable. The authors conclude that effective control of Giardia cysts depends on informed application of the multiple-barrier concept.