Effect of lime-stabilized sludge as landfill cover on refuse decomposition
Journal Article
·
· Journal of Environmental Engineering
- Anderson and Associates, Greensboro, NC (United States)
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Civil Engineering
Increased quantities of wastewater-treatment sludge coupled with more stringent regulations make it important to develop alternatives for residuals management. The use of a mixture of anaerobically digested, lime-stabilized wastewater sludge (LSS) and soil as a cover material was evaluated for its effect on refuse decomposition and leachate quality. Tests were conducted in 4-L reactors filled with shredded refuse an operated to accelerate refuse stabilization. Cover mixtures evaluated in quadruplicate included pure soil, pure lime, and mixtures containing 40% and 70% LSS in soil. Methane production and leachate stabilization were enhanced in reactors containing added lime or LSS. The presence of LSS in the cover did not increase the concentrations of NH{sub 3}-N, PO{sub 4}-P, Cd, Cr, Fe, Ni, Pb, or Zn in the leachate. There was a slight increase in Cu attributable to LSS. The use of LSS, or other lime-containing wastes in landfill cover material has the potential to be beneficial as a source of inexpensive cover material, as an outlet for lime waste, and as a method to enhance refuse decomposition and leachate stabilization.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 85988
- Journal Information:
- Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 7 Vol. 121; ISSN 0733-9372; ISSN JOEEDU
- Country of Publication:
- United States
- Language:
- English
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