School of Business, Nanjing University of Information Science & Technology, Nanjing City, Jiangsu Province, China; School of Management and Economics, Beijing Institute of Technology, Beijing 100181, China; Center for Energy and Environmental Policy Research, Beijing Institute of Technology, Beijing 100181, China.
School of Business, Nanjing University of Information Science & Technology, Nanjing City, Jiangsu Province, China.
Sci Total Environ. 2021 Dec 1;798:149258. doi: 10.1016/j.scitotenv.2021.149258. Epub 2021 Jul 24.
Globally, the production of vast volumes of municipal solid waste impacts public health and the climate. Greening the solid waste sector could contribute to the achievement of the Sustainable Development Goals (SDGs). Therefore, this study assessed how the potential electricity and environmental benefits of recycling paper and plastic wastes could contribute to the achievement of the SDGs. The study used model equations methods to estimate the electricity consumption, diesel consumption, and greenhouse gas (GHG) emissions saved due to recycling. The key findings show that the 132.4 thousand toe/day of electricity saved globally in 2012 soared to 182.3 thousand toe/day in 2025. In 2012 and 2025, an average of 63.6% of electricity was saved. Globally, recycling saved a record of 1.4 million ktons COeq/day of GHG emissions in 2012 and 1.9 million ktons COeq/day in 2025. It was further realized that the overall volume of diesel fuel saved in 2012 grew from 511,146 to 703,887 million Liters/day in 2025, representing a rise of 37.7%. The sensitivity analysis shows an increase in the waste collection rate, the fraction of paper waste, the fraction of plastic waste, and the recycling rate in 2025 will boost recyclable resources' energy and environmental benefits. The findings of this study could offer scientific guidance for the achievement of the SDGs related to solid waste recycling and management.
全球范围内,大量城市固体废物的产生对公共健康和气候造成影响。使固体废物处理行业绿色化可能有助于实现可持续发展目标(SDGs)。因此,本研究评估了回收纸和塑料废物的潜在电力和环境效益如何有助于实现 SDGs。该研究使用模型方程方法来估算因回收而节省的电力消耗、柴油消耗和温室气体(GHG)排放。主要发现表明,2012 年全球节省的 13.24 太瓦时/天的电力在 2025 年飙升至 18.23 太瓦时/天。在 2012 年和 2025 年,平均节省 63.6%的电力。全球范围内,回收在 2012 年节省了创纪录的 140 万吨二氧化碳当量/天的温室气体排放,2025 年为 190 万吨二氧化碳当量/天。此外,人们还意识到,2012 年节省的柴油燃料总量从 5.11146 亿升/天增加到 2025 年的 7.03887 亿升/天,增长了 37.7%。敏感性分析表明,提高废物收集率、废纸比例、塑料废物比例和 2025 年的回收率将提高可回收资源的能源和环境效益。本研究的结果可为实现与固体废物回收和管理相关的 SDGs 提供科学指导。