| 氯消毒和紫外消毒对城市污水处理厂二沉池出水中粪大肠菌群耐药性的影响 |
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| 引用本文： | 张崇淼,苗艳辉,张庆珮,徐 欢.氯消毒和紫外消毒对城市污水处理厂二沉池出水中粪大肠菌群耐药性的影响[J].环境科学研究,2014,27(4):422-428. |
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| 作者姓名： | 张崇淼 苗艳辉 张庆珮 徐 欢 |
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| 作者单位： | 1.西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 陕西 西安 710055 ;清华大学, 国家环境保护环境微生物利用与安全控制重点实验室, 北京 100084 |
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| 基金项目： | 国家自然科学基金项目(51248002);国家环境保护环境微生物利用与安全控制重点实验室开放基金项目(MARC 2011D038);陕西省污水处理与资源化重点科技创新团队项目(2013KCT-13) |
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| 摘 要： | 为考察城市污水处理厂消毒方式对出水中细菌耐药性的影响,使用二沉池出水进行氯消毒和紫外消毒试验. 选择AMP(氨苄西林)、TET(盐酸四环素)、CIP(环丙沙星)和CHL(氯霉素)作为典型的抗生素,研究消毒前后粪大肠菌群耐药率的变化. 结果表明:当水中ρ(有效氯)在0~1.0mg/L范围内增加时,粪大肠菌群对AMP和CIP的耐药率都有所升高,而对TET的耐药率却呈下降趋势. 当使用1.0mg/L氯消毒之后,粪大肠菌群对AMP、TET、CIP、CHL的耐药率分别为35.1%、5.6%、62.3%、0. 粪大肠菌群对AMP、TET和CIP的耐药性在氯消毒后会逐渐恢复. 氯消毒后48h,粪大肠菌群对AMP、TET和CIP的耐药率均高于消毒前. 在较低的紫外辐照剂量 (约16mJ/cm2以下)范围内,随着紫外辐照剂量的升高,粪大肠菌群对多种抗生素的耐药率均有降低,而较高的紫外辐照剂量则可能导致粪大肠菌群耐药率升高.
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| 关 键 词： | 氯消毒 紫外消毒 粪大肠菌群 耐药性 二沉池出水 |
| 收稿时间： | 2013/8/21 0:00:00 |
| 修稿时间： | 2013/10/28 0:00:00 |
Effects of Chlorination and Ultraviolet Disinfection on Antibiotic Resistance of Fecal Coliforms in Secondary Settling Tank Effluent of Municipal Wastewater Treatment Plant |
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| ZHANG Chong-miao,MIAO Yan-hui,ZHANG Qing-pei and XU Huan.Effects of Chlorination and Ultraviolet Disinfection on Antibiotic Resistance of Fecal Coliforms in Secondary Settling Tank Effluent of Municipal Wastewater Treatment Plant[J].Research of Environmental Sciences,2014,27(4):422-428. |
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| Authors: | ZHANG Chong-miao MIAO Yan-hui ZHANG Qing-pei and XU Huan |
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| Institution: | Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China ;State Environmental Protection Key Laboratory of Microorganism Application and Risk ControlMARC, Tsinghua University, Beijing 100084, China;Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China |
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| Abstract: | In order to investigate the effect of disinfection method on the antibiotic resistance of bacteria in the secondary effluent of municipal wastewater treatment plant, the secondary settling tank effluent samples were used to conduct the experiments of chlorination and ultraviolet disinfection. Ampicillin (AMP), tetracycline (TET), ciprofloxacin (CIP) and chloramphenicol (CHL) were chose as typical antibiotics to study the resistance rates of fecal coliforms before and after disinfection. The results showed that when the available chlorine concentration in range of 0-1.0mg/L during chlorination process, the fecal coliforms resistance rate to AMP, and CIP increased with the increase of chlorination dose after chlorination, while TET-resistant rate showed a downward trend. After treatments with 1.0mg/L chlorine, the resistance rates to AMP, TET, CIP, CHL were 35.1%, 5.6%, 62.3%, 0, respectively. Fecal coliforms can restore their vesistances to AMP, TET and CIP after chlorination. At 48h after chlorination, these resistance rates were higher than those before chlorination. When the ultraviolet irradiation dose was low (approximate under 16mJ/cm2), the fecal coliforms resistance rates to antibiotics decreased with the increase of ultraviolet irradiation dose, however, but the high dose of ultraviolet irradiation may cause the rise of the antibiotic resistance rate. |
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| Keywords: | chlorination ultraviolet disinfection fecal coliforms antibiotic resistance secondary settling tank effluent |
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