Greenhouse Gas Emissions Analysis Working toward Zero-Waste and Its Indication to Low Carbon City Development
Greenhouse Gas Emissions Analysis Working toward Zero-Waste and Its Indication to Low Carbon City Development
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DOI：
10.3390/en14206644
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发表时间：
2021-10
期刊：
影响因子：
3.2
通讯作者：
Ruixi Zhao;Lu Sun;Xiaolong Zou;Yi Dou
中科院分区：
文献类型：
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作者：
Ruixi Zhao;Lu Sun;Xiaolong Zou;Yi Dou
发展低碳城市和减少城市社区温室气体(GHG)排放迫在眉睫。在社区一级改进温室气体清单的潜力很大。与此同时，由于垃圾产生量的快速增加，建设零废物城市和提高垃圾处理效率已经成为重大的环境问题。这项研究旨在通过应用自下而上的方法，制定一个社区规模的废物部门温室气体排放清单，并提高其准确性和一致性。这项研究涵盖废物部门的直接和间接排放类别，目标是建立一个零废物社区。位于日本的本条早稻田社区被用作案例研究社区。通过第一手现场数据对废物处理行业的能耗进行了评估和计算。废物部门的温室气体排放量估计包括废物焚烧、生活废水和废物运输。由于产生的废物量较大，排放最多的是百事达超市，其中二氧化碳-生物质碳排放量约占总排放量的50%。此外，还对新技术的实施情况进行了量化分析。这项研究通过对三个案例的比较，提出了减少温室气体排放以实现零废物社区的建议。案例1一切照常；案例2提出了焚烧生物气化的组合；案例3介绍了固体回收燃料和生物气化系统的组合。SRF对减排的贡献最大，情况3的能量回收率最高。此外，对比使用SRF发电和供热产生的温室气体排放量，发现使用SRF作为供暖比使用SRF发电减少了更多的温室气体排放。
Low carbon city development and greenhouse gas (GHG) emission mitigation in urban communities are urgent. There is great potential to improve the GHG inventory at the community level. Meanwhile, building zero-waste cities and improving waste treatment efficiency have been significant environmental issues due to the rapid increase of waste generation. This research aims to develop a community-scale GHG emission inventory of the waste sector and improve its accuracy and consistency through applying the bottom-up approach. This study covers both direct and indirect emissions categories of the waste sector with the goal of building a zero-waste community. Honjo Waseda community, located in Japan, was used as a case study community. Energy consumption waste treatment sectors were evaluated and calculated through first-hand field data. GHG emission estimation of the waste sector included waste incineration, residential wastewater, and waste transport. The highest emissions originated from Beisiagate supermarket due to the large waste amount produced, and the CO2-biomass carbon emissions reached approximately 50% of the total emissions. Furthermore, a quantitative analysis of the implementation of new technologies was also conducted. This study created proposals for GHG emission reduction toward a zero-waste community through the comparison of three cases. Case 1 was business as usual; Case 2 proposed a combination of incineration bio-gasification (MBT); Case 3 introduced a combination of solid recovered fuel (SRF) and a bio-gasification system. SRF contributed the most to emission reduction, and Case 3 exhibited the highest energy recovery. Furthermore, comparing the GHG emissions produced by the use of SRF for power generation and heat supply revealed that using SRF as a heat supply reduced more GHG emissions than using SRF for power generation.