폐기물매립지에서 탄소거동을 이용한 폐기물 온실가스 발생량 평가 = Evaluation of Greenhouse Gas Emissions from Municipal Solid Wastes through Carbon Flows in Landfill

다국어 초록 (Multilingual Abstract)

The objective of this research was to estimate the greenhouse gas (GHG) emission factors for food, paper, and woodwastes through methane (CH4) flow analysis. The GHG emissions from a given amount of landfill waste depend on thecarbon (C) flows in the waste: (1) carbon storage in landfills, (2) C in carbon dioxide (CO2) and CH4 generated in anaerobicwaste decomposition, (3) C in CO2 and CH4 emitted to the atmosphere through vertical gas wells, (4) C in CO2 fromCH4 oxidation through cover soils, and (5) C in CH4 emitted to the atmosphere through cover soils. This study reviewsthe literature on the ranges for DOCf (the fraction of degradable organic carbon that can decompose) and OX (oxidationfactor) values of food, paper, and wood, with a particular focus on the role of lignin. There is an inverse relationshipbetween lignin and the DOCf of paper and wood wastes. In this respect, the lignin content could be used as an abatementindicator for the DOCf of paper and wood. The literature review shows that the average DOCf values for food, paper,and wood were 0.72, 0.61, and 0.12, respectively. The country-specific DOCf value for wood (0.44) is significantly higherthan the ranges reported in the literature, which implies that the country-specific DOCf for wood can overestimate GHGemissions compared to the DOCf obtained from the literature. The estimated GHG emissions factors were 1,055 kg-CO2e/ton-wet waste for food, 1,367 kg-CO2e/ton-wet waste for paper, and 276 kg-CO2e/ton-wet waste for wood. Sensitivityanalysis results showed that the most influential parameters were MCF (CH4 correction factor), DOCf, and OX. In orderto reduce GHG emissions from landfill in Korea, landfill sites currently in operation should be converted from anaerobicto semi-aerobic.

참고문헌 (Reference)

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