Record Display for the EPA National Library Catalog

RECORD NUMBER: 384 OF 751

OLS Field Name OLS Field Data
Main Title Mechanism for Ash Assisted Sludge Dewatering.
Author Micale., F. J. ;
CORP Author Lehigh Univ., Bethlehem, Pa. Center for Surface and Coatings Research.;Municipal Environmental Research Lab., Cincinnati, Ohio. Wastewater Research Div.
Year Published 1976
Report Number EPA-17030-ECM; EPA/600/2-76/297;
Stock Number PB-261 070
Additional Subjects Sewage treatment ; Activated sludge process ; Dewatering ; Fly ash ; Ashes ; Additives ; Incinerators ; Residues ; Surface properties ; Reclamation ; Settling ; Sewage filtration ; Inorganic salts ; Silicon dioxide ; Magnetite ; Carbon black ; Polymers ; Surfactants ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-261 070 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 62p
Abstract
The ability of various additives to improve the dewaterability of activated sludge was determined and the surface properties of additives characterized in order to arrive at a mechanism for ash conditioning of activated sludge. The primary additives investigated were fly ash and 3 sludge incinerator ashes. Since the presence of salts and a solid surface complicates the interpretation of experimental results, a series of experiments was devised where either salts or solids alone were added to the activated sludge for settleability measurements. The solids consisted of the washed ashes themselves, as well as two silicas, two carbon samples, and magnetite, which contained high surface areas and exhibited different surface properties. The salts consisted of the washings obtained from the ashes and a number of inorganic salts and ionic polymeric surfactants.