Influence of the Classification of Municipal Solid Wastes on the Reduction of Greenhouse Gas Emissions: A Case Study of Qingdao City, China

• Published in: Huanjing kexue Vol. 44; no. 5; p. 2995
• Main Authors: Chen, Ji-Hong, Bian, Rong-Xing, Zhang, Ting-Xue, Gao, Chen-Qi, Sun, Ying-Jie, Li, Wei-Hua, Zhang, Guo-Dong, Zhan, Mei-Li
• Format: Journal Article
• Language: Chinese
• Published: China 08.05.2023
• Subjects: waste classification; carbon emissions; anaerobic digestion; food waste; carbon footprints
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.202206322

The municipal solid waste (MSW) sector is an important source of greenhouse gas (GHG) emissions. MSW classification can achieve waste reduction and improve resource utilization. However, few studies have investigated the effects of MSW classification on GHG emission reduction. Therefore, the GHG emissions under different MSW disposal modes before and after classification were studied based on the life cycle assessment method in the four districts of Qingdao City. The results showed that MSW classification could significantly reduce the GHG emissions during the whole MSW treatment process. The net carbon emissions(in CO /MSW)during the whole process of waste treatment for mode 1 (mixed collection+landfill), mode 2 (mixed collection+incineration), mode 3 (waste classification+anaerobic digestion of food waste and other incineration), and mode 4 (waste classification+anaerobic digestion of food waste, recycling of recyclable waste, and other incineration) were 686.39, -130.12, -61.88, and -230.17 kg·t , respecti