Journal
WASTE MANAGEMENT & RESEARCH
Volume 31, Issue 7, Pages 692-699Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0734242X13485794
Keywords
Bioreactor; landfill; waste; heat transfer; latent heat; anaerobic
Categories
Funding
- Ontario Centres of Excellence [CR-20033-08]
- Waste Management of Canada
- AECOM
- GENIVAR
- Golder Associates
- WESA
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A bioreactor landfill operated in Sainte-Sophie, Quebec, Canada was instrumented to better understand the waste stabilization process in northern climates. Instrument bundles were placed within the waste to monitor temperature, oxygen, moisture content, settlement, total load, mounding of leachate and electrical conductivity. A finite element model was developed to simulate the heat fluxes to and from the waste, as well as heat generation within the waste from both anaerobic and aerobic processes. The results of the analysis suggest the majority of the aerobic activity occurs in the top portion of the waste lift exposed to ambient air. In addition, the model indicates that frozen waste lifts require a significant amount of heat to thaw the liquid fraction. The model also demonstrates that when a lift of cold waste is placed at the bottom of the landfill, the subsurface acts as a significant source of heat.
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