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在中国进口固体废弃物禁令下,评估回收纸制品生命周期温室气体排放量:一个案例研究

Huijing Deng¹, Dingfan Zhang¹, Huajun Yu¹

¹Fudan Tyndall Center, Department of Environmental Science & Engineering, Fudan University, Shanghai 200438, China.

The Science of the total environment

|May 27, 2023

概括

中国的进口固体废物禁令增加了新闻纸的生命周期温室气体 (GHG) 排放. 使用家用废纸可显著减少温室气体排放,为回收纸业提供可持续的解决方案.

科学领域:

环境科学环境科学
工业生态学工业生态学
材料科学材料科学材料科学

背景情况:

中国2018年禁止进口固体废物,这大大改变了其回收纸业的原材料采购.
这种转变影响了纸张产品 (如报纸) 的环境足迹,特别是整个生命周期的温室气体 (GHG) 排放.

研究的目的:

评估进口固体废物禁令对中国新闻纸生产生命周期温室气体排放的影响.
使用不同的原材料场景来比较报纸生产的环境性能:进口废纸,原始纸,国内废纸和进口回收纸.

主要方法:

使用了生命周期评估 (LCA) 方法,涵盖了从原材料获取到制造 ("摇篮到坟墓") 的整个产品生命周期.
该研究分析了四种生产途径:P0 (禁令前进口废纸),P1 (原始纸),P2 (国内废纸) 和P3 (进口回收纸).
评估的关键影响类别是全球变暖潜力,表达为每生产的报纸每公斤CO2e.

主要成果:

使用原始纸 (P1) 的报纸生产导致温室气体排放量最高 (2724.91千克CO2e/),其次是进口回收纸 (P3),排放量最高为2400.88千克CO2e/.
国内废纸 (P2) 的温室气体排放量最低 (1619.27千克CO2e/),仅略低于使用进口废纸 (P0) 的禁令前情景的1742.39千克CO2e/.
禁令后目前的温室气体平均排放量增加了17.62%,达到2049.33千克CO2e/;然而,转向家用废纸 (P2) 或进口回收纸 (P3) 可以将其减少12.22%,甚至导致0.79%的下降.

结论:

进口固体废物禁令导致了中国新闻纸生产生命周期温室气体排放量的增加.
国内废纸被认为是中国回收纸业减少温室气体排放的关键和有前途的原材料.
加强中国国内废纸回收系统,为进一步减少温室气体排放和提高环境可持续性提供了重大机会.

关键词:

禁止进口固体废弃物的使用.中国中国中国中国.温室气体排放排放量温室气体排放量生命周期评估生命周期评估报纸上的新闻纸.

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