摘要
Abstract
[Objective]In order to achieve sustainable social development under the current background of"dual carbon",this paper aims to explore the application of life cycle assessment(LCA)method in the study of carbon emission reduction of urban water utilities system and clarify the characteristics and laws of carbon emissions,in order to provide reference for formulation of carbon emission reduction strategy of urban water utilities system.[Methods]Firstly,the theoretical framework of LCA is introduced,including four stages:target definition,inventory analysis,impact evaluation and interpretation.On this basis,this paper summarizes the application of LCA method to the carbon accounting and carbon emission reduction of various subsystems(water supply,wastewater,reclaimed water and rainwater)of urban water system,and the carbon accounting objects and boundaries are clarified,and the composition of carbon emissions of different systems is analyzed.[Results]Through application of LCA method,this paper summarizes the research progress of carbon emission reduction of urban water system at home and abroad,reveals the carbon emission of each subsystem of urban water utilities system,and provides data support for carbon emission reduction.The study finds that the carbon emissions of urban water utilities systems mainly come from energy consumption,chemical use and sewage sludge treatment.[Conclusion]In view of the carbon emission problem of urban water utilities system,this paper proposes carbon emission reduction paths and strategies in three categories:carbon reduction,carbon substitution and carbon sink.Specific actions include optimizing energy utilization structure,improving energy efficiency,promoting low-carbon technologies,and strengthening the construction and management of wastewater treatment facilities.At the same time,it is necessary to pay attention to the responsibility relationship between various entities in water system,and strengthen cooperation from the operating enterprises to management departments.Through implementation of these specific carbon reduction measures,it is expected to reduce the carbon emissions of urban water utilities systems and contribute to the realization of China's"dual carbon"goal.关键词
城镇水务系统/生命周期评价(LCA)/碳减排/碳中和/碳核算Key words
urban water utilities system/life cycle assessment(LCA)/carbon emission reduction/carbon neutrality/carbon accounting分类
资源环境
