Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Evaluation of dewatering devices for producing high-solids sludge cake /
Author Cassel, Alan F. ; Johnson, Berinda P.
Other Authors
Author Title of a Work
Johnson, Berinda P.
CORP Author District of Columbia Dept. of Environmental Services, Washington. Water Resources Management Administration.;Municipal Environmental Research Lab., Cincinnati, OH.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available to the public from the National Technical Information Service,
Year Published 1979
Report Number EPA-600/2-79-123; EPA-68-03-2455
Stock Number PB80-111503
OCLC Number 06509492
Subjects Sewage sludge--Drying.
Additional Subjects Sludge disposal ; Dewatering ; Sewage treatment ; Incinerators ; Performance evaluation ; Design ; Pilot plants ; Filters ; Cost analyses ; Solid wastes
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  TD769.7.M37 Region 1 Library/Boston,MA 04/29/2016
EJBD ARCHIVE EPA 600-2-79-123 Headquarters Library/Washington,DC 02/09/2011
EJBD  EPA 600-2-79-123 Headquarters Library/Washington,DC 08/31/2011
ELBD  EPA 600-2-79-123 AWBERC Library/Cincinnati,OH 12/05/2017
ESAD  EPA 600-2-79-123 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-111503 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xiii, 177 pages : illustrations, charts ; 28 cm.
Pilot-plant dewatering tests were made to establish design and operating parameters for dewatering municipal wastewater sludges on recessed plate filter presses (both diaphragm and fixed volume types), continuous belt presses, and retrofit units for a vacuum filter. Results from the 1.5-year study showed that when dewatering lime and ferric chloride-conditioned sludges, the recessed plate presses consistently produced a 30-40% solids filter cake. Feed solids to the units averaged 5% total solids with a range from 2.4 to 10%. Various ratios of waste-activated to primary sludge solids, with emphasis on the 2/1 ratio, were tested. Belt presses produced cake solids from 25-30% when the polymer conditioning dosage was optimized. When used as a retrofit device to a vacuum filter, the belt press gave cake solids in the 30-40% range during laboratory-scale tests. Design parameters are developed to dewater a mixture of 67% secondary and 33% primary sludge in a full-scale plant installation. The estimated costs for dewatering plus final disposal by either incineration or composting are also presented.
"District of Columbia Government, Department of Environmental Services, Water Resources Management Administration." "August 1979. "Contract no. 68-03-2455."