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| Assessment of carbon emissions during excavation, screening, and reuse of municipal solid waste landfill |
| WEI Yu-fang1, XU Wen-jie1, PENG Yi2, CHEN Yun-min1, KE Han1, ZHAN Liang-tong1, YU Lin-feng1 |
1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, Hangzhou 310058, China;
2. Department of Emergency Management, School of Government, Nanjing University, Nanjing 210023, China |
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Abstract This paper evaluated the carbon emissions and carbon reduction benefits of excavating, screening, and reusing landfill material, contributing to the enhancement of China’s carbon emission calculation system in the municipal solid waste treatment sector. Initially, from a process perspective, the emission and reduction factors of each process were classified and organized. Subsequently, a large municipal solid waste landfill in Eastern China was selected as the research subject, and a Monte Carlo simulation was conducted for analysis. The results indicated that the carbon reduction from landfill mining exceeded its emissions, with an average net emission of -235.22kg CO2-eq/t stale waste. Moreover, the main sources of emissions and reductions were analyzed. It was found that the incineration of light materials was a significant contributor to emissions, while the recovery of electricity and thermal energy from incineration was the primary source of emission reduction. Lastly, through the sensitivity analysis of parameters, it was discovered that energy conversion efficiency and the net reduction factor significantly influenced the reduction results.
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Received: 06 February 2024
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