| 混凝沉淀-UF工艺去除二级出水中ARGs效能研究 |
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| 引用本文： | 张启伟,孙丽华,史鹏飞,张雅君.混凝沉淀-UF工艺去除二级出水中ARGs效能研究[J].环境科学研究,2019,32(4):718-724. |
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| 作者姓名： | 张启伟 孙丽华 史鹏飞 张雅君 |
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| 作者单位： | 北京建筑大学环境能源工程学院,北京,100044;北京建筑大学,城市雨水系统与水环境教育部重点实验室,北京 100044 |
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| 基金项目： | 国家自然科学基金项目（No.51678027） |
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| 摘 要： | 为了研究混凝沉淀-UF工艺对城市污水处理厂二级出水中ARGs（抗生素抗性基因）去除的影响，以PACl（聚合氯化铝）和PFS（聚合硫酸铁）作为混凝剂，采用qPCR（实时荧光定量聚合酶链式反应）和EEM（三维荧光光谱）等分析混凝沉淀-UF工艺对ARGs的削减及其影响因素.结果表明:① PACl、PFS投加量（分别以Al、Fe计，下同）分别为0.85、0.50 mmol/L时，与直接UF工艺相比，混凝沉淀-UF工艺对水中各类ARGs的去除量高2~3个数量级，其中PACl-UF工艺的效果更好，去除量为2.51~3.52个数量级；对水中DOC（溶解性有机碳）、富里酸类及溶解性微生物代谢产物的去除效果更好，DOC去除率由18%升至36%.②直接UF、PACl-UF、PFS-UF 3种工艺膜进、出水的线性拟合结果显示，ARGs浓度与ρ（DOC）、16S rDNA浓度均呈显著正相关.研究显示，混凝沉淀-UF工艺可以有效去除二级出水中的ARGs，且有机物、16S rDNA的去除有助于ARGs的削减.
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| 关 键 词： | 抗性基因 超滤 混凝沉淀 有机物 |
| 收稿时间： | 2018/4/25 0:00:00 |
| 修稿时间： | 2018/9/7 0:00:00 |
Removal Efficiency of ARGs in Secondary Effluent by Coagulation-Sedimentation-UF Process |
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| ZHANG Qiwei,SUN Lihu,SHI Pengfei and ZHANG Yajun.Removal Efficiency of ARGs in Secondary Effluent by Coagulation-Sedimentation-UF Process[J].Research of Environmental Sciences,2019,32(4):718-724. |
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| Authors: | ZHANG Qiwei SUN Lihu SHI Pengfei and ZHANG Yajun |
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| Affiliation: | 1.School Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China2.Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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| Abstract: | In order to study the effect of a coagulation sedimentation-UF process on the removal of antibiotic resistance genes (ARGs) in the secondary effluent from wastewater treatment plants (WWPTs), the degree and the factors of ARGs reduction by polyaluminum chloride (PACl) and polyferric sulfate (PFS) coagulants were analyzed by real-time fluorescence quantitative polymerase chain reaction (qPCR) and three-dimensional fluorescence spectrum scanner (EEM). When the PAC1 was 0.85 mmol/L as Al and the PFS was 0.50 mmol/L as Fe, the removal of ARGs by the coagulation sedimentation-UF was 2-log to 3-log higher than by direct UF, and the removal efficiency of ARGs by PACl-UF was 2.51-log to 3.52-log. Compared to direct UF, the coagulation sedimentation-UF process had better removal of DOC (dissolved organic carbon), fulvic acid and soluble microbial metabolites, and the DOC removal rate increased from 18% to 36%. The results of the linear fitting of the membrane influent and effluent of the direct UF, PAC1-UF, and PFS-UF indicated that the ARGs had significant positive correlations with organic matter and 16S rDNA. The study showed that the ARGs in the secondary effluent could be effectively removed by the coagulation sedimentation-UF process, and the removal of organic matter and 16S rDNA contributed to the reduction of ARGs. |
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| Keywords: | antibiotic resistance genes ultrafiltration coagulation-sedimentation organic matter |
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