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首页> 外文期刊>Environmental Science & Technology >Bacterial Community Structure in the Drinking Water Microbiome Is Governed by Filtration Processes
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Bacterial Community Structure in the Drinking Water Microbiome Is Governed by Filtration Processes

机译：饮用水微生物组中的细菌群落结构由过滤过程控制

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摘要

The bacterial community structure of a drinking water microbiome was characterized over three seasons using 16S rRNA gene based pyrosequencing of samples obtained from source water (a mix of a groundwater and a surface water), different points in a drinking water plant operated to treat this source water, and in the associated drinking water distribution system. Even though the source water was shown to seed the drinking water microbiome, treatment process operations limit the source water's influence on the distribution system bacterial community. Rather, in this plant, filtration by dual media rapid sand filters played a primary role in shaping the distribution system bacterial community over seasonal time scales as the filters harbored a stable bacterial community that seeded the water treatment processes past filtration. Bacterial taxa that colonized the filter and sloughed off in the filter effluent were able to persist in the distribution system despite disinfection of finished water by chloramination and filter backwashing with chloraminated backwash water. Thus, filter colonization presents a possible ecological survival strategy for bacterial communities in drinking water systems, which presents an opportunity to control the drinking water microbiome by manipulating the filter microbial community. Grouping bacterial taxa based on their association with the filter helped to elucidate relationships between the abundance of bacterial groups and water quality parameters and showed that pH was the strongest regulator of the bacterial community in the sampled drinking water system.
机译：使用基于16S rRNA基因的焦磷酸测序法，对饮用水微生物组的细菌群落结构进行了三个季节的表征，这些样品得自自来水（地下水和地表水的混合物），饮用水厂中处理该来源的不同点水，以及相关的饮用水分配系统。即使显示源水已成为饮用水微生物组的种子，但处理过程中的操作仍限制了源水对分配系统细菌群落的影响。相反，在该工厂中，通过双重介质快速砂滤器进行的过滤在塑造季节性分布范围内的分布系统细菌群落方面起着主要作用，因为过滤器具有稳定的细菌群落，该细菌群落为过滤后的水处理过程注入了种子。尽管通过加氯消毒对最终水进行消毒并用加氯的反冲洗水对过滤器进行反冲洗，但细菌在分类器中定居并在过滤器流出物中脱落的细菌类群仍然能够在分配系统中持续存在。因此，滤池定殖为饮用水系统中细菌群落提供了一种可能的生态生存策略，这为通过操纵滤池微生物群落控制饮用水微生物组提供了机会。根据它们与过滤器的关联对细菌类群进行分组有助于阐明细菌群的丰度与水质参数之间的关系，并表明pH是采样饮用水系统中细菌群落最强的调节剂。

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  • 来源
    《Environmental Science & Technology》 |2012年第16期|p.8851-8859|共9页
  • 作者

    Ameet J. Pinto; Chuanwu Xi; Lutgarde Raskin;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Michigan;

    Department of Environmental Health Sciences, University of Michigan;

    Department of Civil and Environmental Engineering, University of Michigan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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