城市水务系统碳排放测算及减碳对策分析:以成都市为例

Carbon emission measurement and carbon reduction strategy analysis of urban water system:A case study of Chengdu water system

城市水务系统是单位产值能耗较高且与各行各业联系紧密的行业。在“双碳”背景下,开展碳排放核算及减碳策略研究是水务系统高质量发展的重要内容。通过构建成都市水务系统碳排放框架,基于大量统计数据,对水务系统中各个环节(取、制、供、排等)产生的直接及间接碳排放进行统筹核算。结果显示,2019年成都市水务系统碳排放总量约为70.3万吨(以CO_(2)计),主要碳排放领域为污水处理系统,其中的污水处理及污泥处理处置环节的碳排放贡献最为突出。基于核算结果,对水务系统减污降碳目标及实现路径进行系统分析及定量测算,提出包括“节水优先、高效管网、源头提质、低碳工艺及能源回用”的五大策略推进水务系统减碳转型,为成都市及类似城市的“双碳”水务系统建设提供参考。

Urban water system is an industry that has high energy consumption per unit output and is closely tied with other industries.Under the background of"carbon peaking and neutrality (double carbon)"policy,conducting carbon emission calculation and carbon reduction strategy research is an important part of highquality development of water system.This paper set up the structure of carbon emission calculation of urban water system and calculated direct and indirect carbon emission of Chengdu water system,including water extraction,production,supply,and discharge,based on large amounts of real data.The result showed that the total carbon emission of Chengdu water system was approximately 745,000 tons (as CO_(2) equivalent) in 2019.The main producer was sewage system,in which the carbon emission generated from sewage treatment and sludge disposal was the most prominent.Based on these results,the goals and implementation path of Reduce pollution and carbon of water system were systematically and quantitatively analyzed.This paper put forward five key measures to promote carbon reduction,including"water conservation as priority,efficient pipe network,source improvement,low-carbon technology,and energy reuse",which can provide theoretical and technical support for the construction of"double-carbon"water system in Chengdu and similar cities.