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<p>Methane emissions occurring during the early stage of waste deposition at tropical landfills can be significant due to the presence of easily biodegradable waste components, high moisture content, and warm temperatures. This research determined surface methane emission rates at a landfill site in Thailand during the first year after waste deposition. The gas evolution and emission rates were then modeled. The measurements were performed using a static chamber methodology, and influencing factors, including time after waste deposition and presence of precipitation, were considered. The methane emission rates were found varied spatially and temporally, ranging between 0.02 and 225.28&#xa0;g/m<sup>2</sup>/day with a spatial average emission rate of 33.29&#xa0;g/m<sup>2</sup>/day over the entire waste deposition area during 10 months of monitoring period. The gas evolution with time was influenced by occurrence of precipitation just after waste decomposition and landfill closure. The progression of methane emissions could be explained by an S-shaped model when high precipitation took place whereas multi-phase exponential equations were proposed under no or low precipitation conditions. Over the entire waste disposal area, methane emission reached its peak after 7 months with a higher rate observed in the rising phase than in the decline phase.</p>

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Evolution of methane emissions during the early stage of municipal solid waste deposition in a tropical landfill

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Chart Chiemchaisri,
  • Wilai Chiemchaisri,
  • Kittikul Sarsuwan,
  • Noppharit Sutthasil,
  • Komsilp Wangyao

摘要

Methane emissions occurring during the early stage of waste deposition at tropical landfills can be significant due to the presence of easily biodegradable waste components, high moisture content, and warm temperatures. This research determined surface methane emission rates at a landfill site in Thailand during the first year after waste deposition. The gas evolution and emission rates were then modeled. The measurements were performed using a static chamber methodology, and influencing factors, including time after waste deposition and presence of precipitation, were considered. The methane emission rates were found varied spatially and temporally, ranging between 0.02 and 225.28 g/m2/day with a spatial average emission rate of 33.29 g/m2/day over the entire waste deposition area during 10 months of monitoring period. The gas evolution with time was influenced by occurrence of precipitation just after waste decomposition and landfill closure. The progression of methane emissions could be explained by an S-shaped model when high precipitation took place whereas multi-phase exponential equations were proposed under no or low precipitation conditions. Over the entire waste disposal area, methane emission reached its peak after 7 months with a higher rate observed in the rising phase than in the decline phase.