The Korean Society For New And Renewable Energy
[ Article ]
New & Renewable Energy - , pp.15-22
ISSN: 1738-3935 (Print) 2713-9999 (Online)
Online publication date 07 Sep 2020
Received 30 May 2020 Revised 25 Jun 2020 Accepted 03 Aug 2020
DOI: https://doi.org/10.7849/ksnre.2020.0014

매립가스의 에너지 회수 및 표면발산을 고려한 매립장 온실가스 배출 평가

이용현1) ; 권용재2) ; 천승규3), *
Assessment of Greenhouse Gas Emissions from Landfills Based on Energy Recovery and Surface Emissions of Landfill Gas
Lee, Yonghyun1) ; Kwon, Yongchai2) ; Chun, Seung-Kyu3), *
1)Ph.D. Candidate, Graduate School of Energy and Environment, Seoul National University of Science and Technology
2)Professor, Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology
3)Professor, Graduate School of Energy and Environment, Seoul National University of Science and Technology

Correspondence to: * skchun@seoultech.ac.kr Tel: +82-2-970-6880 Fax: +82-2-970-6800

© 2020 by the New & Renewable Energy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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 9191×103 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.

Keywords:

Landfill gas, CH4, Electricity generation, Surface emission, GHGs

키워드:

매립가스, 메탄, 발전, 표면발산, 온실가스