| 引用本文: | 祝泽兵,吴晨光,钟丹,袁一星,单莉莉,袁媛,魏星际,张杰.寒区湖库型水源供水系统中耐氯菌的生长[J].哈尔滨工业大学学报,2015,47(8):1.DOI:10.11918/j.issn.0367-6234.2015.08.001 |
| ZHU Zebing,WU Chenguang,ZHONG Dan,YUAN Yixing,SHAN Lili,YUAN Yuan,WEI Xingji,ZHANG Jie.The growth of chlorine resistant bacteria in water supply sourced from lakes and reservoirs in cold region[J].Journal of Harbin Institute of Technology,2015,47(8):1.DOI:10.11918/j.issn.0367-6234.2015.08.001 |
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| 寒区湖库型水源供水系统中耐氯菌的生长 |
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祝泽兵1,2,3,吴晨光1,2,钟丹1,2,袁一星1,2,单莉莉1,2,袁媛1,2,魏星际4,张杰1,2
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(1. 城市水资源与水环境国家重点实验室(哈尔滨工业大学),150090 哈尔滨;2. 哈尔滨工业大学 市政环境工程学院, 150090 哈尔滨;3. 华东交通大学 土木建筑学院,330013 南昌;4. 哈尔滨供水工程有限责任公司,150060 哈尔滨)
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| 摘要: |
| 研究供水系统中耐氯菌的生长对饮用水中微生物安全的评估、预防和控制至关重要,为此,以寒区湖库型水源供水系统的主体水及生物膜为研究对象,对其中的异养菌和耐氯菌进行了检测,并利用扫描电子显微镜观察了生物膜的生物相.结果表明：自来水在管网输送过程中,余氯质量浓度大于0.2 mg/L的主体水中仍然存在细菌再生长现象.耐氯菌在所研究的供水系统中普遍存在,经水厂消毒和管网输送后主体水中的耐氯菌数量小于350 CFU/mL,而生物膜中耐氯菌数目一般高于主体水的耐氯菌数目2个数量级.未经消毒处理的滤后水和生物膜中耐氯菌数目均最多,而在清水池中生长的细菌大多比较耐氯.供水系统生物膜中的微生物能见杆菌和球菌,以杆菌居多. |
| 关键词: 耐氯菌 生长 湖库型水源 供水系统 主体水 生物膜 |
| DOI：10.11918/j.issn.0367-6234.2015.08.001 |
| 分类号:TU991. 33 |
| 基金项目:国家自然科学基金(51308149)；城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2014TS08)；国家水体污染控制与治理科技重大专项(2012ZX07408-002-004-002). |
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| The growth of chlorine resistant bacteria in water supply sourced from lakes and reservoirs in cold region |
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ZHU Zebing1,2,3, WU Chenguang1,2, ZHONG Dan1,2, YUAN Yixing1,2, SHAN Lili1,2, YUAN Yuan1,2, WEI Xingji4, ZHANG Jie1,2
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(1. State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology), 150090 Harbin, China; 2. School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin,China; 3. School of Civil Engineering and Architecture, East China Jiaotong University, 330013 Nanchang,China; 4. Harbin Water Supply Engineering Co. Ltd., 150060 Harbin, China)
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| Abstract: |
| The study on the growth of chlorine resistant bacteria in water supply systems is critical for the assessment, control, and prevention of microbiological safety associated with drinking water. In this study, bulk water and biofioms in water supply system sourced from lakes and reservoirs in cold region were investigated by the detection of heterotrophic bacteria and chlorine resistant bacteria, and the biota in the biofilm were observed by scanning electron microscope. Results showed that the bacteria regrowth still existed in the bulk water even within more than 0.20 mg/L free chlorine in the distribution systems. Chlorine-resistant bacteria survived pervasively in the studied water supply system. The chlorine-resistant bacteria in post-chlorination and distributed water were less than 350 CFU/mL. The number of chlorine-resistant bacteria in the biofilm was two orders of magnitude higher than that of the bulk water in general. The chlorine resistant bacteria presented most in pre-chlorination of sand filter water and biofilm, while almost all viable bacteria in the clearwell were chlorine-resistant bacteria. Microbial morphologies in the biofilms of water supply systems were composed of cocci and rod, with the latter especially predominated in the biofilms. |
| Key words: chlorine-resistant bacteria growth lake and reservoir water resource water supply system bulk water biofilm |
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