摘要
梳理了现有污水处理碳核算体系,提出了针对不同应用场景的核算方式和边界范围,选取长沙市8座典型污水处理厂进行碳核算分析,发现污水处理厂站工程中电耗和生化单元中的N_(2)O为主要碳排热点,其分别贡献了53.28%和23.56%的碳排放量,同时化石源CO_(2)排放也是污水处理厂运行过程中不可忽视的重要排放源。通过典型工艺核算分析,发现AAO-MBR工艺各项碳排放强度指标均处于最高水平。通过碳排影响因素相关分析,研究发现进水TN、BOD_(5)浓度与各项碳排放强度呈现一定的负相关关系。案例污水处理厂通过一系列替碳措施形成在厂界范围内实现了一定规模的碳减排,但距污水处理行业碳中和目标还相差甚远,基于此,提出了源、网、厂、端全流程碳减排路径。
The existing sewage treatment carbon accounting system was sorted out in this pa-per,accounting methods and boundary ranges for different application scenarios were proposed,and 8 typical sewage treatment plants in Changsha were selected for carbon accounting analysis.It was found that the power consumption in the sewage treatment plant project and N_(2)O in the bio-chemical unit were the main carbon emission hotpots,which contributed 53.28%and 23.56%of the carbon emissions respectively.At the same time,the fossil source CO_(2) emission was also an important emission source that could not be ignored in the operation process of sewage treatment plants.Through the accounting analysis of typical processes,it was found that the carbon emission intensity indexes of AAO-MBR process were at the highest level.Through the correlation analysis of carbon emission influencing factors,it was found that the influent TN and BOD_(5) concentrations showed a negative correlation with the carbon emission intensity.The case sewage treatment plant achieved a certain scale of carbon emission reduction within the plant boundary through a series of carbon replacement measures,but it was far from the carbon neutrality target of the sewage treatment industry.Based on the analysis above,the carbon emission reduction path of the whole process of source,network,plant and terminal was proposed.
作者
刘阳
施周
文宇鸿
陈积义
龙毅湘
吴未红
王湘
吴阳春
LIU Yang;SHI Zhou;WEN Yuhong;CHEN Jiyi;LONG Yixiang;WU Weihong;WANG Xiang;WU Yangchun(Hunan Architectural Design Institute Group Co.,Ltd.,Changsha 410012,China;College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《给水排水》
CSCD
北大核心
2024年第1期37-45,共9页
Water & Wastewater Engineering
关键词
污水处理厂
碳排放特征
减排路径
核算方法
Sewage treatment plant
Carbon emission characteristics
Emission reduction path
Accounting method
