Record Display for the EPA National Library Catalog


Main Title Direct Filtration of Lake Superior Water for Asbestiform Fiber Removal.
CORP Author Black and Veatch, Kansas City, Mo.;National Environmental Research Center, Cincinnati, Ohio.
Year Published 1975
Report Number DACW37-74-C-C-0079; EPA-ROAP-21AQB-024; EPA/670/2-75/050a;
Stock Number PB-245 555
Additional Subjects Water treatment ; Asbestos ; Lake Superior ; Water pollution control ; Filtration ; Amphiboles ; Serpentive ; Pilot plants ; Granular materials ; Diatomaceous earth ; Fluid filters ; Flocculating ; Cost analysis ; Turbidity ; Design ; Water supply ; Minnesota ; Duluth(Minnesota)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB-245 555 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 119p
Pilot plant research conducted in 1974 at Duluth, Minnesota, demonstrated that asbestiform fiber counts in Lake Superior water could be effectively reduced by municipal filtration plants. During the study, engineering data were also obtained for making cost estimates for construction and operation and both granular and diatomaceous earth (DE) media filtration plants ranging in size from 0.03 to 30 mgd. Both dual and mixed-media granular filters using alum and nonionic polymer, employing flash mix and flocculation without settling and DE filters with alum coated DE as precoat and/or body feed or with Catfloc B added to raw water, produced effluents with amphibole fiber counts below electron microscope detection limits. Turbidity was not a direct measure of fiber count, but amphibole counts were generally lowest at effluent turbidities (