New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Assessment of Greenhouse Gas Emissions from Landfills Based on Energy Recovery and Surface Emissions of Landfill Gas

매립가스의 에너지 회수 및 표면발산을 고려한 매립장 온실가스 배출 평가

  • Lee, Yonghyun (Graduate School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Kwon, Yongchai (Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology) ;
  • Chun, Seung-Kyu (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
  • Received : 2020.05.30
  • Accepted : 2020.08.03
  • Published : 2020.09.25
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Abstract

This study involved a total budget analysis on the greenhouse gas (GHGs) emissions of landfills, focusing on surface emissions and the effect on emissions reductions of generating landfill gas (LFG) electricity from March 7, 2007 to December 31, 2018. The GHGs reduction effect from the electricity generation using 536.6 × 103 tCO2 of CH4 was only 5.8% of the GHGs from surface emissions of 9,191 × 103 tCO2. In the total budget, the collection ratio should be over 95% if the reduction effect is greater than the surface emissions. The correlation coefficient for the relationship between the LFG collection ratio and GHGs reduction was -0.89. An additional effect of lowering CH4 content may occur if the surface emitting flux of LFG decreased with an increase in the collection ratio. The unit reduction effect of GHGs by suppressing surface emissions was 4174 tCO2/TJ. This was far greater than that of LFG power generated (54.3 tCO2/TJ), demonstrating that surface emission control is the most important measure by which to mitigate GHGs emission.

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References

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