Record Display for the EPA National Library Catalog


Main Title Relationship between Free Liquids and Solids Content for Sewage Sludges.
Author Farrell, J. B. ; Gerstle, R. W. ;
CORP Author IT Environmental Programs, Inc., Cincinnati, OH.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher 1992
Year Published 1992
Report Number EPA/68-03-3346; EPA/600/J-92/303;
Stock Number PB92-227453
Additional Subjects Earth fills ; Sludge disposal ; Liquids ; Waste water ; Requirements ; Tests ; Solids ; Dewatering ; Drying ; Leachates
Library Call Number Additional Info Location Last
NTIS  PB92-227453 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 15p
EPA guidelines for disposal of solid waste to landfills require that the wastes contain no 'free liquids', where the absence of free liquids is demonstrated by the EPA-prescribed paint filter liquids test (PFLT). The requirement applies to wastewater treatment sludges disposed to landfills. The investigation was conducted to determine whether solids content of sludges could be used in lieu of the PFLT since most treatment plants routinely determine solids content of their sludges. The experiments carried out demonstrated that solids content required to pass the PFLT ranged from 5.5% for waste activated sludge to 15.6% for primary sludges. Agitation such as might be encountered in truck transport of sludge to a landfill did not cause sludges that initially passed the test to fail; however, some sludges that initially passed the test failed after standing for 24 hours.