Record Display for the EPA National Library Catalog


Main Title Advanced Waste Water Treatment Using Powdered Activated Carbon in Recirculating Slurry Contactor-Clarifiers.
Author Garlan, C. F. ; Beeb, R. L. ;
CORP Author Infilco, Tucson, Ariz.
Year Published 1970
Report Number FWQA-14-12-400; FWQA-17020-FKB; 05386,; 17020-FKB-07/70
Stock Number PB-197 890
Additional Subjects ( Sewage treatment ; Activated carbon treatment) ; Polyelectrolytes ; Activated carbon ; Flocculants ; Cost estimates ; Water flow ; Adsorption ; Powders ; Contactors ; Slurries ; Pilot plants ; Field tests ;
Library Call Number Additional Info Location Last
NTIS  PB-197 890 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 89p
Pilot-scale studies dealing with the use of recirculating-slurry solids-contact clarifiers in treating activated sludge plant effluent were studied. Evaluation of all available materials led to selection of Darco S-51 activated powdered carbon and Purifloc C-32 polyelectrolyte flocculating agent, with 6 to 7 mg/l of polyelectrolyte required at a carbon feed rate of up to 140 mg/l. 30% greater carbon efficiency, as opposed to a single stage conventional unit, was achieved with a single slurry unit, while results for two series clarifiers were comparable to that of two conventional counter-current adsorption systems requiring multiple agitated tanks, clarifiers, and filters. Estimated costs for a 10 mgd plant with 240 mg/l and 8 mg/l dosages of carbon and polyelectrolytes respectively are $0.15/1000 gal for a 10 mgd plant, and $0.12.7/1000 gal for a 100 mgd plant. Further cost reductions could be possible in the event that effluent quality restrictions would allow a decrease in the carbon dosages. (WRSIC abstract)