污水处理厂不同粒径生物气溶胶负载肠杆菌科细菌分布特征及影响因素  

Distribution Characteristics and Influencing Factors of Enterobacteriaceae Loaded by Size-segregated Bioaerosols From Wastewater Treatment Plants

作　　者：高爱丽[1] 王旭一 黄青 隋心 杨唐[1] 程丽华[1] 姜波 惠晓亮 张展鹏 高晓东 GAO Aili;WANG Xuyi;HUANG Qing;SUI Xin;YANG Tang;CHENG Lihua;JIANG Bo;HUI Xiaoliang;ZHANG Zhanpeng;GAO Xiaodong(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China;Qingdao Shouchuang Ruihai Water Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266520 [2]青岛首创瑞海水务有限公司,青岛266000

出　　处：《北京工业大学学报》2023年第12期1330-1337,共8页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(52100125);山东省自然科学基金资助项目(ZR2021QD022)。

摘　　要：为探究污水处理厂不同粒径生物气溶胶负载肠杆菌科分布特征及影响因素,在江苏省某污水处理厂厂界内及周边采集了不同季节不同粒径生物气溶胶样本,并分析其负载的肠杆菌科浓度。对于生物气溶胶负载的总肠杆菌科及其可吸入性片段,冬季是最主要的逸散季节,而污泥脱水间是最主要的释放单元。污水处理厂不同粒径生物气溶胶负载肠杆菌科的分布特征存在显著的季节性差异和处理单元间差异。相比于上风向,厂界内和下风向生物气溶胶具有更高的肠杆菌科总浓度、可吸入性片段浓度及相对比例。厂界内与上风向生物气溶胶负载肠杆菌科的粒径分布存在显著的差异性,差异度为64.32%;而厂界内与下风向生物气溶胶负载肠杆菌科的粒径分布的差异性不显著,且差异度下降至32.17%。相对湿度、温度、风速和光照强度均对污水处理厂不同粒径生物气溶胶负载肠杆菌科的分布存在显著影响(P<0.05);其中,相对湿度是最主要的影响因素。该研究可为污水处理厂生物气溶胶污染的风险评估和控制提供理论依据。To investigate the distribution characteristics and influencing factors of Enterobacteriaceae loaded by size-segregated bioaerosols from wastewater treatment plants(WWTPs),size-segregated bioaerosols in different seasons were collected within and around a WWTP in Jiangsu Province,and the concentration of the loaded Enterobacteriaceae was then analyzed.For the Enterobacteriaceae in overall bioaerosols and corresponding respiratory fragments,winter was the dominant emission season,and the sludge dewatering room was the main emission unit.Significant difference of Enterobacteriaceae loaded on size-segregated bioaerosols from WWTPs was found among different seasons or treatment units.Compared to upwind,the WWTP and downwind were characterized with higher enrichment of Enterobacteriaceae in overall bioaerosols and corresponding respiratory fragments.The size distribution of Enterobacteriaceae loaded by bioaerosols was significantly different between the WWTP and upwind,with a dissimilarity of 64.32%;that between the WWTP and downwind were not significantly different,and the dissimilarity decreased to 32.17%.The relative humidity,temperature,wind speed,and solar radiation,all had significant effects on the Enterobacteriaceae loaded by size-segregated bioaerosols(P<0.05);among them,the relative humidity was the predominant factor.This study can provide a theoretical basis for the risk assessment and control of bioaerosol pollution in WWTPs.

关 键 词：污水处理厂 生物气溶胶 肠杆菌科 粒径分布 可吸入性片段 影响因素 

分 类 号：X513[环境科学与工程—环境工程] X703