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

被引：1

作者：

Chen J.-H. ^{[1
]}

Bian R.-X. ^{[1
]}

Zhang T.-X. ^{[1
]}

Gao C.-Q. ^{[1
]}

Sun Y.-J. ^{[1
]}

Li W.-H. ^{[1
]}

Zhang G.-D. ^{[2
]}

Zhan M.-L. ^{[3
]}

机构：

[1] School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao

[2] Qingdao Jieyuan Environment Co., Ltd., Qingdao

[3] Qingdao Solid Waste Disposal Co., Ltd., Qingdao

来源：

Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 05期

关键词：

anaerobic digestion; carbon emissions; carbon footprints; food waste; waste classification;

D O I：

10.13227/j.hjkx.202206322

中图分类号：

学科分类号：

摘要：

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 CO2 / 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 -1, respectively. Improving the classification efficiency of food waste had no significant impact on carbon emissions. The reduction in carbon emissions increased linearly with the improvement of waste recycling efficiency. For every 10% increase in the recovery efficiency of recyclable waste, the net carbon emission decreased by 26. 6%(16. 5 kg.t - 1 ). Appropriate separation of food waste, improving the recycling efficiency of recyclable waste, and reducing the leakage rate of biogas from anaerobic digestion are feasible strategies to reduce carbon emissions from MSW disposal units through the classification of MSW. © 2023 Science Press. All rights reserved.

引用

页码：2995 / 3002

页数：7

共 41 条

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