A/O工艺污水处理厂醛酮化合物释放特征及风险评价  

Characterisation of Aldehydes and Ketones Emission From A/O Process WTTP and Risk Evaluation

作　　者：杨庆[1] 蒋显聪 刘秀红[2] 徐宗泽 曹效鑫 董余凡 胡展宏 石磊[1] 李雪梅[4] YANG Qing;JIANG Xiancong;LIU Xiuhong;XU Zongze;CAO Xiaoxin;DONG Yufan;HU Zhanhong;SHI Lei;LI Xuemei(National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology,Beijing University of Technology,Beijing 100124,China;Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;Guizhou Zhuxin Water Environment Industry Co.Ltd.,Guiyang 550001,China;Renmin University of China,Office of Laboratory Management and Teaching Facilities Development,Beijing 100872,China)

机构地区：[1]北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室,北京100124 [2]北京工业大学城市建筑学部,北京100124 [3]贵州筑信水务环境产业有限公司,贵阳550001 [4]中国人民大学实验室管理与教学条件保障处,北京100872

出　　处：《北京工业大学学报》2023年第12期1338-1347,共10页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51978008)。

摘　　要：对北京市某A/O工艺城市污水处理厂各处理单元释放的挥发性醛酮类有机化合物的释放通量及环境空气浓度进行长期监测,评估了空间尺度上4种典型醛酮化合物的排放特征,同时计算了各工艺单元暴露风险值,评估醛酮化合物对工作人员及周边居民的危害性。结果表明,污水处理厂中挥发性醛酮化合物排放通量由大到小依次为:好氧池1段、好氧池2段、好氧池3段、缺氧池、初沉池、二沉池。生物曝气池是各处理单元中醛酮化合物日排放量占比最大的处理单元,4种醛酮气体的占比达57.81%以上。各处理单元环境空气中醛酮化合物的环境质量浓度也均不相同,总质量浓度变化范围在30.44~1230.79μg/m^(3),其中甲醛的质量浓度最低,为2.46~71.36μg/m^(3),乙醛质量浓度最高,为59.32~1454.44μg/m^(3)。各处理单元排放的乙醛存在致癌风险。This study conducted long-term monitoring of the emission fluxes and ambient air concentrations of volatile aldehydes and ketones released from each treatment unit of an A/O process urban wastewater treatment plant in Beijing,evaluated the emission characteristics of four typical aldehydes and ketones on the spatial scale,and calculated the exposure risk values of each process unit to assess the hazards of aldehydes and ketones to the staff and the neighbourhood residents.Results show that the emission fluxes of volatile aldehydes and ketones compounds in the wastewater treatment plant are,in descending order:aerobic tank section 1>aerobic tank section 2>aerobic tank section 3>anoxic tank>primary sedimentation tank>secondary sedimentation tank.The BAF is the treatment unit with the largest percentage of daily emissions of aldehydes and ketones among the treatment units,with more than 57.81%of the four aldehydes and ketones gases.The ambient concentrations of aldehydes and ketones in the ambient air of each treatment unit also varies,with the total concentration varying from 30.44 to 1230.79μg/m^(3),of which formaldehyde has the lowest concentration content,ranging from 2.46 to 71.36μg/m^(3),and acetaldehyde has the highest concentration,ranging from 59.32 to 1454.44μg/m^(3).There is a carcinogenic risk of acetaldehyde emitted from each treatment unit.

关 键 词：城市污水处理厂 醛酮 释放通量 环境空气浓度 日排放量 风险评价 

分 类 号：X703[环境科学与工程—环境工程]