同一城市的两个市政污水处理厂中抗生素抗性基因消长研究  

Changes of antibiotic resistance genes in two municipal wastewater treatment plants in the same city

作　　者：陈茂霞 常佳丽 卫诗倩 邹家尉 杨娟 Chen Maoxia;Chang Jiali;Wei Shiqian;Zou Jiawei;Yang Juan(School of Chemistry,Resource and Environment,Leshan Normal University,Leshan 614000)

机构地区：[1]乐山师范学院化学与资源环境学院,四川乐山614000

出　　处：《环保科技》2021年第1期1-8,共8页Environmental Protection and Technology

基　　金：乐山师范学院引进人才科研启动项目(No.801418009);四川省教育厅自然科学项目(No.18ZB0271)。

摘　　要：为了考察处理工艺对污水中抗生素抗性基因(antibiotic resistance genes,ARGs)削减的影响,本研究检测了同一城市的两个市政污水处理厂(1#:缺氧+好氧,2#:CASS+纤维转盘滤池)污水中六种典型ARGs(tetX、sul1、blaTEM、qnrS、ermB、intl1)绝对丰度和相对丰度的变化。结果表明,两个污水处理厂进水的ARGs指标和常规污染物指标均相似,污水处理厂对ARGs绝对丰度的总去除率为99.74%~99.96%,对ARGs相对丰度影响不大。污水中ARGs的去除主要发生在生物处理单元和过滤单元,紫外消毒对ARGs去除效果有限。出水中检出较高sul1和intl1残留,其中2#污水处理厂出水中上述残留ARGs绝对丰度分别为6.77×10^(2)copies/mL和6.85×10^(3)copies/mL,相比1#出水更低(分别为2.28×10^(3)copies/mL和1.24×10^(4)copies/mL)。The absolute abundance and relative abundance of six typical ARGs(tetX,sul1,blaTEM,qnrS,ermB,intl1)from two municipal wastewater treatment plants(WWTPs)(1#:anoxic+aerobic;2#:CASS+fiber turntable filter)in the same city were investigated in this study.The results showed that the abundance of ARGs and the conventional pollutants in the influents of the two WWTPs were similar.The total removal efficiency of the absolute abundance of ARGs in the two WWTPs was 99.74%-99.96%,while the effect of treatment facilities could be neglected on the relative abundance of ARGs.The removal of ARGs in sewage mainly occurred in biological treatment units and filtration unit,and UV disinfection has limited effect on the removal of ARGs.High absolute abundance of sul1 and intl1 were detected in the effluents,and the absolute abundance of sul1 and intl1 in effluent of 2#WWTP were 6.77×10^(2)copies/mL and 6.85×10^(3)copies/mL,respectively,lower than those in 1#WWTP(2.28×10^(3)copies/mL and 1.24×10^(4)copies/mL,respectively).

关 键 词：污水处理厂 市政污水 抗生素抗性基因 生物污染物 

分 类 号：X703[环境科学与工程—环境工程]