全覆盖污水处理厂N_(2)O排放实测及本地化因子测算  

Measurement of Nitrous Oxide Emission and Localization Factor Determination in a Fully Covered Wastewater Treatment Plant

作　　者：熊鹏宇 钱晓雍[2] 王丽花 万春黎[1] 林冰洁 汪吉祥 吕燕 李政文 刘翔[1] XIONG Peng-yu;QIAN Xiao-yong;WANG Li-hua;WAN Chun-li;LIN Bing-jie;WANG Ji-xiang;LÜYan;LI Zheng-wen;LIU Xiang(Department of Environmental Science and Engineering,Fudan University,Shanghai 200433,China;Shanghai Academy of Environmental Sciences,Shanghai 200233,China;Shanghai Chengtou Wastewater Treatment Group Co.Ltd.,Shanghai 201203,China)

机构地区：[1]复旦大学环境科学与工程系,上海200433 [2]上海市环境科学研究院,上海200233 [3]上海城投污水处理有限公司,上海201203

出　　处：《中国给水排水》2024年第15期28-35,共8页China Water & Wastewater

基　　金：上海市科委技术标准项目(22DZ2200100)。

摘　　要：准确核算氧化亚氮(N_(2)O)排放量是碳减排研究的重要基础。为此,选取上海市采用UNITANK工艺的某全覆盖污水处理厂为研究对象,对4个污水处理单元(进水泵房、沉砂池、调蓄池和生物反应池)的N_(2)O排放量进行了长期监测和全面评估。结果表明,污水脱氮过程是污水处理厂中N_(2)O排放的主要来源(92.94%),排放量均值为0.13 g/m^(3);UNITANK工艺全年不间断排放N_(2)O。在季节性尺度上,相关性分析显示,N_(2)O排放量与水温、进水总氮浓度和总氮去除率相关。N_(2)O排放量在日变化上可能受到水温及进水水质的影响,其与水温及进水总氮浓度同步达到峰值。经计算,UNITANK工艺的本地化N_(2)O排放因子(EFN_(2)O)为0.07%~0.425%,显著低于联合国政府间气候变化专门委员会(IPCC)提出的EFN2O默认值(1.6%)。本地化EFN_(2)O的提出,可为准确核算上海市及周边地区污水处理厂的N2O排放量提供参考。Accurate quantification of nitrous oxide(N_(2)O)emission is a crucial foundation for research on carbon reduction.Therefore,a fully covered wastewater treatment plant utilizing the UNITANK process in Shanghai was chosen as the study subject for conducting long-term monitoring and comprehensive assessment of N_(2)O emission from four treatment units(inlet pumping station,grit chamber,storage tank,and bioreactor).The nitrogen removal process accounted for 92.94%of N_(2)O emission in the wastewater treatment plant,with an average emission of 0.13 g/m^(3).The UNITANK process exhibited continuous N_(2)O emissions throughout the year.For seasonal variation,the correlation analysis revealed that N_(2)O emission was associated with water temperature,influent total nitrogen,and total nitrogen removal rate.The diurnal variation of N_(2)O emission might be influenced by water temperature and influent quality,and its peak value was synchronized with water temperature and total nitrogen concentration.The localization factor(EFN_(2)O)for the UNITANK process was calculated to range from 0.07%to 0.425%,which was significantly lower than the default EFN_(2)O value(1.6%)proposed by the Intergovernmental Panel on Climate Change(IPCC).The localization of EFN_(2)O can provide reference for the accurate calculation of N_(2)O emission of wastewater treatment plants in Shanghai and surrounding areas.

关 键 词：全覆盖污水处理厂 N_(2)O排放因子 本地化 UNITANK工艺 

分 类 号：TU992[建筑科学—市政工程]