| 引用本文: | 李伟英,周艳彦,张骏鹏,王峰,白涛,张伟.营养物质和氯对饮用水中细菌再生长的影响[J].哈尔滨工业大学学报,2017,49(2):70.DOI:10.11918/j.issn.0367-6234.2017.02.012 |
| LI Weiying,ZHOU Yanyan,ZHANG Junpeng,WANG Feng,BAI Tao,ZHANG Wei.Effects of nutrients and chlorine on bacterial regrowth in drinking water[J].Journal of Harbin Institute of Technology,2017,49(2):70.DOI:10.11918/j.issn.0367-6234.2017.02.012 |
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| 营养物质和氯对饮用水中细菌再生长的影响 |
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李伟英1,2,周艳彦1,2,张骏鹏1,2,王峰1,2,白涛3,张伟4
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(1.同济大学 环境科学与工程学院,上海200092;2.长江水环境教育部重点实验室(同济大学),上海200092; 3.上海同济城市规划设计研究院,上海200092;4.成都川力智能流体设备股份有限公司,成都 611500)
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| 摘要: |
| 饮用水生物稳定性与水质安全息息相关，控制细菌再生长是保障饮用水生物稳定性的有效措施.为此，以细菌再生长潜力(BRP)为研究方法，采用实验室配水实验，探讨碳、氮、磷3种营养物质以及自由氯对细菌再生长潜力的影响.结果表明，单一营养物质不足时，满足土著细菌生长的碳、氮、磷营养物质质量浓度的临界值分别为250、7和3 μg/L，碳、氮、磷对BRP的产率系数分别为2.35×106(R2=0.99, p < 0.05)、9.76×107(R2=0.91, p < 0.05)和1.76×108 CFU/μg (R2=0.91, p < 0.05)；两种营养物质不足时，相对质量浓度较低的营养物质为BRP主要限制因子，而且可导致其他营养物质支持细菌再生长能力的下降.研究发现随着水中自由氯质量浓度的增加，BRP呈下降趋势，当自由氯质量浓度≥0.50 mg/L，细菌生长得到有效控制，氯削减水中营养物质促进细菌再生长的能力.
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| 关键词: 饮用水 生物稳定性 细菌再生长潜力 营养物质 氯 限制因子 |
| DOI：10.11918/j.issn.0367-6234.2017.02.012 |
| 分类号:X703 |
| 文献标识码:A |
| 基金项目:国家水体污染控制与治理科技重大专项"江苏太湖水源饮用水安全保障技术集成与综合示范"(2012ZX07403-001);成都川力直饮水工程安全保障技术的研究(20150911);苏州地区饮用水管网生物稳定性及控制技术研究(20150719) |
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| Effects of nutrients and chlorine on bacterial regrowth in drinking water |
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LI Weiying1,2,ZHOU Yanyan1,2, ZHANG Junpeng1,2, WANG Feng1,2, BAI Tao3, ZHANG Wei4
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(1.College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; 2.Key Laboratory of Yangtze Aquatic Environment (Tongji University), Ministry of Education, Shanghai 200092, China; 3.Shanghai Tongji Urban Planning & Design Institute, Shanghai 200092, China;4.Chengdu Chuanli Intelligence Fuild Equipment Co., Ltd., Chengdu 611500, China)
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| Abstract: |
| The biological stability is closely associated with the safety of drinking water and can be controlled effectively by prohibiting bacterial regrowth. The effects of three main nutrients (organic carbon, phosphorus, nitrogen) and chlorine on bacterial regrowth in drinking water were investigated using BRP method in lab-scale experiments. The critical values of carbon, nitrogen and phosphorus promoting bacterial growth were 250, 7 and 3 μg/L respectively, while the yield values for heterotrophic bacteria of the three nutrients were 2.35×106(R2=0.99, p < 0.05), 9.76×107 (R2=0.91, p < 0.05) and 1.76×108 CFU/μg (R2=0.91, p < 0.05) during the absence of only one kind of nutrient. When two kinds of nutrients were in deficiency, nutrient which was relatively low would be the main BRP limiting factor and decrease the supporting ability of the other nutrients on bacterial regrowth. Moreover, BRP decrease with the increasing amount of free chlorine in drinking water. When the concentration of free chlorine reached 0.5 mg/L, the growth of bacteria was inhibited obviously. In other words, free chlorine weakened the ability of nutrients supporting bacterial regrowth.
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| Key words: drinking water biological stability bacterial regrowth potential (BRP) nutrient chlorine limiting factor |
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