Record Display for the EPA National Library Catalog


Main Title Shredded Rubber Tires as a Bulking Agent in Sewage Sludge Composting.
Author Higgins, A. J. ; Suhr, J. L. ; Rahman, M. S. ; Singley, M. E. ; Rajput, V. S. ;
CORP Author Rutgers - The State Univ., New Brunswick, NJ.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1986
Report Number EPA-R-810255-01; EPA/600/J-86/348;
Stock Number PB87-180816
Additional Subjects Elastomers ; Tires ; Sludge ; Composts ; Bulking ; Particle size ; Soil properties ; Zinc ; Iron ; Mixtures ; Anaerobic processes ; Digestion(Decomposition) ; Reprints ; Heavy metals
Library Call Number Additional Info Location Last
NTIS  PB87-180816 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22p
The study evaluated shredded rubber tires mixed with raw primary sludge to determine the optimum particle size and mix ratio for efficient composting. Of the three sizes and mix ratios tested, the 1.27-2.54 cm size and the rubber chip to sludge mix ratio of 2:1 were found to be optimum. Anaerobically digested and secondary biological sludges were then composted with the optimum size rubber chips. Due to their high moisture content and low C/N ratio, all three sludges required a moisture absorbing amendment and supplemental carbon. Sawdust was tested and found to be a suitable amendment. Heavy metal levels increased due to the concentrating effect as organic matter was decomposed. Rubber chips contributed zinc and iron to the finished compost. Although elevated after five cycles, the increases in zinc and iron were not high enough to limit the use of shredded rubber in composting sewage sludge.