“双碳”目标下我国黄河流域生活垃圾处置单元温室气体产生及减排策略分析

Analysis of greenhouse gas generation and emission reduction countermeasures of municipal solid waste disposal units in the Yellow River Basin under the "Dual Carbon" goals

  • 摘要: 城市生活垃圾(MSW)处理处置单元是重要的温室气体(GHG)排放源,明确其排放变化趋势是制定GHG减排对策的前提。利用IPCC清单模型,对黄河流域9省区2012—2022年MSW处置单元的GHG进行了估算。结果表明:2020年,焚烧以58.05%的占比成为MSW的主要处置方式;沿黄9省区GHG排放量(以CO2当量计)从2012年的2 284.8万t增加到2019年的3 152.7万t,而后逐年下降,在2022年降低至2 332.6万t;2021年,焚烧产生的CO2成为GHG排放主要来源;从省份分布来看,山东、四川和河南是GHG排放量较大的省份,宁夏的排放量最少。强化填埋场CH4减排及资源化、进一步实施生活垃圾分类、提高可回收垃圾资源化效率和焚烧余热梯次利用等是生活垃圾处理处置单元碳减排可行的策略。

     

    Abstract: Municipal solid waste (MSW) treatment and disposal units are important sources of greenhouse gas (GHG) emissions, and clarifying their emission pattern is a prerequisite for formulating countermeasures for GHG reduction. Using the IPCC inventory model, GHG emissions from MSW disposal units in nine provinces in the Yellow River Basin were estimated from 2012 to 2022. The results showed that incineration became the main disposal method of MSW with a 58.05% share in 2020. GHG emissions from the nine provinces along the Yellow River increased from 22.848 million tons (in terms of CO2 equivalent) in 2012 to 31.527 million tons in 2019, and then decreased year by year to 23.326 million tons in 2022. CO2 generated from MSW incineration became the main source of GHG emissions in 2021. Among the provinces, Shandong, Sichuan and Henan were the provinces with higher emissions, while Ningxia had the lowest emissions. Strengthening landfill CH4 emission reduction and resource utilization, further implementing MSW classification, improving recyclable waste resource utilization efficiency and cascading utilization of incineration waste heat are feasible strategies for carbon emission reduction in MSW disposal units.

     

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