Record Display for the EPA National Library Catalog


Main Title Chemical coagulation/mixed-media filtration of aerated lagoon effluent /
Author Grutsch, J. F., ; Mallatt, R. C. ; Peters., A. W.
CORP Author American Oil Co., Yorktown, Va.;Robert S. Kerr Environmental Research Lab., Ada, Okla.
Publisher National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency, For sale by the Supt. of Docs., U.S. Govt. Print. Off.
Year Published 1975
Report Number EPA-660/2-75-025; EPA-S-803026; EPA-ROAP-21AZP
Stock Number PB-247 148
OCLC Number 01914716
Subjects Sewage--Purification--Filtration ; Aerated package treatment systems ; Sewage lagoons
Additional Subjects Filtration ; Industrial waste treatment ; Coagulation ; Refineries ; Lagoons(Ponds) ; Temperature ; Concentration(Composition) ; Turbidity ; Design ; Operating costs ; Maintenance ; Cold weather construction ; Aeration ; Petroleum products ; Brackish water ; Virginia ; Aeration ponds ; Zeta potential
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA 660-2-75-025 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA 660-2-75-025 repository copy AWBERC Library/Cincinnati,OH 02/03/2020
EMBD  EPA/660/2-75/025 NRMRL/GWERD Library/Ada,OK 06/07/1996
ESBD  EPA-660-2-75-025 CPHEA/PESD Library/Corvallis,OR 09/27/2017
NTIS  PB-247 148 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 103 pages : illustrations ; 27 cm.
Operating problems and the effect of operating variables were investigated during full-scale plant operations in the scalping mode. Influent suspended solids concentration and water temperature were the most significant independent variables. Mechanical limitations were studied, including a filter bed disturbance that necessitated a total bed replacement. High, localized backwash velocity caused the invisible disturbance which reduced turbidity removal from about 80% to 50%. Diagnostic procedures, design changes, and the costs of operation and maintenance are reported. A cold weather study showed that a three-chemical destablization pretreatment system is required for filtration of biocolloids in brackish water. Determination of the optimal three-chemical destabilization system using zeta potentials required evaluation of zeta potentials in a manner which sorted out the effect of double-layer repression. The colloid destabilization mechanisms of charge neutralization and bridging were required for optimal filter performance. For colder water temperatures, even with optimal chemical treatment, the filter hydraulic loading must be decreased. The change in hydraulic loading with temperature related directly to the water's viscosity.
"Grant #S803026-01; program element 1BB036; ROAP/Task no. 21AZP/028-037." "June 1975." Report prepared by Amoco Oil Company, Yorktown, Virginia. Includes bibliographical references (page 67).