Reproducible Microbial Community Dynamics of Two Drinking Water Systems Treating Similar Source Waters
Reproducible Microbial Community Dynamics of Two Drinking Water Systems Treating Similar Source Waters
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DOI：
10.1021/acsestwater.1c00093
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
Sarah C. Potgieter;Zihan Dai;Minette Havenga;S. Vosloo;Makhosazana Sigudu;A. Pinto;S. Venter
中科院分区：
文献类型：
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作者：
Sarah C. Potgieter;Zihan Dai;Minette Havenga;S. Vosloo;Makhosazana Sigudu;A. Pinto;S. Venter
了解饮用水微生物组的时空动态是否在全规模饮用水系统中可重现是设计有效管理和操纵它的工程策略的重要一步。然而，直接比较全规模饮用水系统是具有挑战性的，因为从水源到处理工艺选择和配置的多个因素对每个系统都是独特的。本研究比较了具有相同处理策略序列的两个饮用水处理厂（DWTPs）中饮用水微生物组的时空动态。这些DWTP处理来自同一河流系统的源沃茨，处理后的饮用水在具有相似消毒剂残留量的同一大型分配系统（DWDS）内分配。水源水社区的差异进行了调和的预消毒处理，导致两个系统之间的过滤后微生物群落高度相似。然而，高社区营业额由于消毒导致两个系统之间的成品水中的微生物群落高度不同。然而，有趣的是，尽管存在消毒剂残留，但在通过DWDS的运输过程中，两个系统中微生物群落的相似程度增加。总的来说，我们的研究发现，饮用水微生物组在独立但几乎相同的DWTP及其相应的DWDS中表现出可重现的空间和时间动态。
Understanding whether the spatiotemporal dynamics of the drinking water microbiome are reproducible in full-scale drinking water systems is an important step in devising engineering strategies for effectively managing and manipulating it. However, direct comparisons across full-scale drinking water systems are challenging because multiple factors, from source water to treatment process choice and configuration, can be unique to each system. This study compared the spatiotemporal dynamics of the drinking water microbiome in two drinking water treatment plants (DWTPs) with identical sequences of treatment strategies. These DWTPs treat source waters from the same river system and treated drinking water is distributed within the same large-scale distribution system (DWDS) with similar disinfectant residual regiments. Dissimilarities in source water communities were tempered by the predisinfection treatments, resulting in highly similar postfiltration microbial communities between the two systems. However, high community turnover due to disinfection resulted in highly dissimilar microbial communities in the finished water between the two systems. Interestingly, however, the degree of similarity of the microbial communities in the two systems increased during transit through the DWDS despite the presence of a disinfectant residual. Overall, our study finds that the drinking water microbiome demonstrated reproducible spatial and temporal dynamics within both, independent but nearly identical, DWTPs and their corresponding DWDSs.