Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Interim Report on Task Force on Phosphate Removal Sludges.
Author Farrell., Joseph B. ;
CORP Author National Environmental Research Center, Cincinnati, Ohio.
Year Published 1975
Report Number EPA-670/2-75-013;
Stock Number PB-238 317
Additional Subjects Sewage treatment ; Activated sludge process ; Sludge drying ; Dewatering ; Phosphates ; Waste water ; Filtration ; Sludge disposal ; Thickening ; Trickling filtration ; Vacuum filters ; Aluminum sulfate ; Iron chlorides ; Calcium oxides ; Alums ; Chemical removal(Sewage treatment) ;
Library Call Number Additional Info Location Last
NTIS  PB-238 317 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 210p
Information on dewatering properties of municipal wastewater sludges is scant and poorly organized. A Task Force has collected information on wastewater sludges with particular emphasis on sludges produced when lime, Fe(+++) or Al(+++) are added for the purpose of P removal to some portion of the wastewater treatment sequence. Data are presented on the thickening and dewatering characteristics of the sludges. Most of the information relates to the mass of sludge produced and its filtering properties. Sludges produced when lime is added to wastewater have greater solids content after settling and dewater at greater mass rates than conventional sludges. However, mass of sludge per volume of wastewater is greatly increased. Considerable information is available on such sludges. Sludges produced when Al(+++) or Fe(+++) is added to wastewater dewater more poorly than conventional sludges and sludge solids content is less. Sludge mass is greater than in conventional treatment but not as great as would be produced by lime addition. Information is clearly not yet adequate for accurately predicting dewatering properties of such sludges.