A/A/O与CASS污水处理工艺碳排放评价与碳减排对策  

A/A/O and CASS Wastewater Treatment Process Carbon Footprint Evaluation and Carbon Emission Reduction Measures

作　　者：颜佳洁 陈彩云 胡军 李婕[1,2] YAN Jiajie;CHEN Caiyun;HU Jun;LI Jie(Fujian Normal University,College of Environmental and Resource Sciences College of Carbon Neutral and Modern Industry,Fujian 350108,China;Fujian Normal University,Fujian Key Laboratory of Pollution Control and Resource Reuse,Fuzhou,Fujian 350108,China;Key Laboratory of Environmental Measurement,Control and Management in Coastal Waters for Fujian Institutions of Higher Learning,Fujian Polytechnic Normal University,Fuqing,Fujian 350300,China)

机构地区：[1]福建师范大学环境与资源学院碳中和现代产业学院,福建福州350108 [2]福建师范大学福建省污染控制与资源循环重点实验室,福建福州350108 [3]福建技术师范学院近海流域环境测控治理福建省高校重点实验室,福建福清350300

出　　处：《福建技术师范学院学报》2024年第2期62-70,共9页JOURNAL OF FUJIAN POLYTECHNIC NORMAL UNIVERSITY

基　　金：福建省社科基金校内培育项目(KY2023FS13).

摘　　要：污水处理行业的碳排放定量评估及碳减排潜力挖掘是实现“双碳目标”的迫切需求.文章采用A/A/O工艺(A厂)和CASS工艺(B厂)两种典型工艺的污水处理厂为研究对象,核算框架以《污水处理厂低碳性能评估技术规范》(CAEPI 49—2022)为主要依据,研究结果表明,A厂总碳排放强度(0.43 kgCO_(2)·m^(-3))比B厂(0.30 kgCO_(2)·m^(-3))高0.13 kg CO_(2)·m^(-3);两厂的间接碳排放均为主要贡献,分别占总碳排放强度的55.4%(A厂)、79.2%(B厂),其中,电耗贡献(A厂34.0%、B厂48.6%)均为间接碳排放的最大占比.相较CASS工艺,A/A/O工艺对COD的去除率高11.3%,对TN的去除率低6.8%,但A/A/O工艺总碳排放强度中CH_(4)占比较CASS工艺多29.5%,药耗方面则低6.8%.降低电耗、药耗等间接碳排放是污水处理行业碳减排主要措施.Quantitative assessment of carbon emission and exploration of the reduction of carbon emission in sewage treatment industry are urgent for achieving the goals of"carbon peak"and"carbon neutrality".In this study,sewage treatment plants adopting two typical processes,A/A/O(Plant A)and CASS(Plant B),are taken as the study cases,and the main accounting framework is based on the Technical Specification for Low Carbon Performance Evaluation of Sewage Treatment Plants(CAEPI 49-2022).The results showed that the total carbon emission intensity of Plant A(0.43 kgCO_(2)·m^(-3))was higher than that of Plant B(0.30 kgCO_(2)·m^(-3)).The indirect carbon emissions of the two plants were the dominant contributions,accounting for 55.4%(Plant A)and 79.2%(Plant B)of the total carbon emission intensity,among which the power energy consumption contributions(34.0% in Plant A and 48.6% in Plant B)were both the largest share.Compared with CASS process,the removal rate of COD by A/A/O process was 11.3% higher,while the removal rate of TN was 6.8% lower.However,in the total carbon emission intensity of A/A/O process,CH_(4) accounted for 29.5% more than that of CASS process,and the chemical agents consumption was 6.8%lower.Reducing indirect carbon emission such as power consumption and chemical agents consumption is the major measure of carbon emission reduction in sewage treatment industry.

关 键 词：碳足迹 碳减排 温室气体 A/A/O工艺 CASS工艺 

分 类 号：X52[环境科学与工程—环境工程]