Record Display for the EPA National Library Catalog


Main Title Comparing Constant-Rate and Declining-Rate Direct Filtration of a Surface Water.
Author Hilmoe, D. J. ; Cleasby, J. L. ;
CORP Author Iowa State Univ., Ames.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1986
Report Number EPA/600/J-86/302;
Stock Number PB87-175642
Additional Subjects Filtration ; Surface waters ; Water treatment ; Flow rate ; Turbidity ; Coliform bacteria ; Particles ; Giardiasis ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB87-175642 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Pilot-scale constant-rate and declining-rate direct filtration systems were evaluated for treating a high quality surface water, using two flow rates and alum or cationic polymer as the primary coagulant. Turbidity, particle count, and total coliform count were used to compare filtrate qualities. It was found that the effluent qualities for the two filtration schemes were the same-a results that disagrees with the conclusions of a previous study that used lime-softened groundwater. However, the results of the current study were consistent with those of past projects in that the rate of head loss increase was the same for both types of filters. (Copyright (c) 1986 Journal AWWA.)