Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Trench incorporation of sewage sludge in marginal agricultural land /
Author Walker, J. M.,
Other Authors
Author Title of a Work
Walker, J. M.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1975
Report Number EPA-600/2-75-034; EPA-68-01-0162
Stock Number PB-246 561
OCLC Number 02024186
Subjects Sewage sludge. ; Sewage disposal. ; Trenching machinery.
Additional Subjects Sludge disposal ; Farms ; Fertilizing ; Land reclamation ; Coliform bacteria ; Trenching ; Ditches ; Salmonella ; Field tests ; Aquifers ; Feasibility ; Metals ; Calcium oxides ; Soils ; Cultivation ; Grasses ; Nitrogen ; Plant growth ; Chlorides ; Heavy metals
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-75-034 Headquarters Library/Washington,DC 06/11/2012
EJBD  EPA 600-2-75-034 Headquarters Library/Washington,DC 05/02/2013
EKBD  EPA-600/2-75-034 Research Triangle Park Library/RTP, NC 06/13/2003
ELBD  EPA 600-2-75-034 AWBERC Library/Cincinnati,OH 01/31/1997
ESAD  EPA 600-2-75-034 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-246 561 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xviii, 232 pages : illustrations ; 27 cm
A trench method was tested for transporting and placing digested and limed raw (undigested) sewage sludges (8% and 20% solids) in trenches in study soil at loadings up to 1150 dry tons/hectare (500 dry tons/acre) without odor problems or hazard of surface runoff. Field scale trenching was best achieved by digging the trenches on contour not more than 75 cm deep, 60 cm wide, and from 60 to 75 cm apart. The study indicated that the best sludge transport method would employ concrete mixer trucks. Trenches could then be filled directly from discharge chutes or indirectly with a peristaltic pump. A tracked trenching machine with a maneuverable rear-mounted digging wheel dug a new trench and simultaneously backfilled a parallel sludged trench. In 2 years, neither heavy metals nor pollution indicator organisms (coliform and salmonella) have moved more than about 30 cm from entrenched sludge into surrounding soil. Moderate amounts of nitrate nitrogen have moved into underdrainage water but not into the underground aquifier. The lime in the sludge reduced metal movement into soil and availability to crops and metal uptake was modest. Tested agricultural practices included cross ripping, tilling, and cropping, with grasses recommended for the first year. Entrenchment appeared feasible for sludge disposal and improving marginal land.
"Program element no.1BB043."