城市水务系统碳排放测算及减碳对策分析：以成都市为例

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 high-quality 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 CO₂ 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.