Relationships between levels of heterotrophic bacteria and water quality parameters in a drinking water distribution system
Relationships between levels of heterotrophic bacteria and water quality parameters in a drinking water distribution system
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DOI：
10.1016/s0043-1354(99)00310-3
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发表时间：
2000-04-01
期刊：
影响因子：
12.8
通讯作者：
Lee, Y
中科院分区：
文献类型：
--
作者：
Carter, JT;Rice, EW;Lee, Y
采用传统的电镀方法对饮用水分配系统中的异养细菌进行定量。采用平板计数琼脂（PCA）、R2A琼脂和尖血琼脂（TSA-SB）三种培养基检测异养平板计数（HPC）水平。每周采集Grab样本。在1997年夏季和秋季，在一个市政供水系统的四个地点。四个采样点包括水处理厂、一个垂直立管、一个增压泵站和一个沿死角干线的私人住宅。泵站和私人住宅也安装了水质探测器和在线生物反应器。检测了HPC细菌水平与标准理化参数之间的关系。在所有四个地点，R2A琼脂上的HPC水平与TSA-SB琼脂上的HPC水平不相关。在所有的大液和生物膜样品中，橙色和黄色色素细菌都是显性表达。大体积流体样品中色素细菌的比例在立管处最高。发现色素沉着百分比与配水系统中水二元性的标准物理和化学参数无关。(C) 2000 Elsevier Science Ltd.版权所有。
Conventional plating methods were used to quantify heterotrophic bacteria from a drinking water distribution system. Three media, plate count agar (PCA), R2A agar and sharp blood agar (TSA-SB) were used to determine heterotrophic plate count (HPC) levels. Grab samples were collected weekly. during the summer and autumn of 1997 at four locations in-a municipal water distribution system. The four sampling sites included the water treatment plant, a vertical standpipe, a booster pump station and a private residence along a dead-end mainline, Thr: pump station and private residence were also instrumented with water quality probes and on-line bioreactors. Relationships between levels of HPC bacteria and standard physical and chemical parameters were examined. HPC levels from R2A agar were found to be uncorrelated with HPC levels on TSA-SB agar at all four locations. Orange and yellow pigmented bacteria were the dominant expressions in all bulk fluid and biofilm samples. The fraction of pigmented bacteria in bulk fluid samples was greatest at the standpipe. Pigmentation percentages were found to be uncorrelated with standard physical and chemical parameters of water duality in distribution systems. (C) 2000 Elsevier Science Ltd. All rights reserved.