Progression of elevated temperatures in municipal solid waste landfills

Navid H. Jafari, Timothy D. Stark, Todd Thalhamer

Research output: Contribution to journalArticlepeer-review

Abstract

Elevated temperatures in municipal solid waste landfills can pose health, environmental, and safety risks because they can generate excessive gases, liquids, pressures, and heat that can damage landfill infrastructure. This paper discusses mechanisms that can lead to elevated temperatures in the landfill and presents a case history to establish trends in gas composition, leachate collection, settlement, and slope movement. In general, landfill gas composition changes from predominantly methane [50-60% volume-to-volume ratio (v/v)] and carbon dioxide (40-55% v/v) to a composition of carbon dioxide (60-80% v/v), hydrogen (10-35% v/v), and carbon monoxide [>1,500 parts per million per volume (ppmv)] as temperatures elevate. As waste temperatures increase, gas and leachate pressures also increase, resulting in odors, leachate outbreaks, and potential slope instability. These observations are summarized in a progression of elevated temperature indicators that are related to field manifestations and possible remedial measures. Finally, biological and chemical processes are proposed to explain the changes in internal landfill processes.

Original languageEnglish (US)
Article number05017004
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume143
Issue number8
DOIs
StatePublished - Aug 1 2017

Keywords

  • Fire
  • Landfill
  • Municipal solid waste
  • Pyrolysis
  • Rapid oxidation
  • Smoldering combustion
  • Temperature

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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