饮用水处理污泥管理中温室气体排放的驱动因素和缓解:生命周期视角

IF 10 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Jing-Jing Wang , Dong-Hai Yang , Shi-Jie Yuan , Zi-Chen Ling , Bin Dong , Xiao-Hu Dai
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引用次数: 0

摘要

饮用水处理污泥(DWTS)的资源回收和处置对可持续供水系统提出了重大挑战,但其温室气体(GHG)排放核算模型仍然缺乏量化。本研究采用从摇篮到坟墓的生命周期评估(LCA),系统评估了六个典型的DWTS管理方案的温室气体排放,包括垃圾填埋处理和五种资源回收策略。结果表明,能源密集型干燥过程和化学品消耗主导了热处理路线的排放,而甲烷产生占垃圾填埋场相关排放的71.8%。在资源回收方案中,由于节能固化和骨料替代,回填材料生产实现了最低的排放(161.33千克二氧化碳当量/吨DS),与烧结砖生产(1765.02千克二氧化碳当量/吨DS)相比减少了91%。敏感性分析确定污泥特性、含水率(脱水后)和化学添加作为关键操作参数。开发的针对特定行业的LCA框架表明,与传统处置相比,优化的回收途径可以减少58 ~ 93%的温室气体排放,主要是通过能源替代和减少原始材料需求。这项工作为在水处理基础设施中实施循环经济原则提供了定量决策支持工具,同时支持减缓气候变化的目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Drivers and mitigation of greenhouse gas emissions in drinking water treatment sludge management: A life cycle perspective
The resource recovery and disposal of drinking water treatment sludge (DWTS) pose significant challenges for sustainable water supply systems, yet its greenhouse gas (GHG) emission accounting model remains poorly quantified. This study employs a cradle-to-grave life cycle assessment (LCA) to systematically evaluate GHG emissions from six representative DWTS management scenarios, including landfill disposal and five resource recovery strategies. Results reveal that energy-intensive drying processes and chemical consumption dominate emissions in thermal treatment routes, while methane generation contributes 71.8 % of landfill-related emissions. Among the resource recovery options, backfill material production achieves the lowest emissions (161.33 kg CO2-eq/t DS), representing a 91 % reduction compared to sintered brick production (1765.02 kg CO2-eq/t DS), due to energy-efficient solidification and aggregate substitution. Sensitivity analysis identifies sludge characteristics, moisture content (after dewatering), and chemical addition as key operational parameters. The developed sector-specific LCA framework demonstrates that optimized recovery pathways can reduce GHG emissions by 58∼93 % compared to conventional disposal, primarily through energy substitution and reduced virgin material demand. This work provides quantitative decision-support tools for implementing circular economy principles in water treatment infrastructure while supporting climate mitigation goals.
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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