Longitudinal and Source-to-Tap New Orleans, LA, USA Drinking Water Microbiology
Longitudinal and Source-to-Tap New Orleans, LA, USA Drinking Water Microbiology
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DOI：
10.1021/acs.est.6b06064
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发表时间：
2017-04-18
影响因子：
11.4
通讯作者：
Pace, Norman R.
中科院分区：
文献类型：
--
作者：
Hull, Natalie M.;Holinger, Eric P.;Pace, Norman R.
对美国路易斯安那州新奥尔良市的两个市政饮用水系统进行采样，以比较处理来自密西西比河的相同地表水的独立系统的微生物学。为了更好地了解时间趋势和微生物学传递到水龙头的来源，这些处理厂和分配系统进行了为期四年的源到水龙头采样。这两个工厂都采用传统的氯胺化处理，在沉降期间或沉降后进行处理，然后在温暖的低水龄系统中分配之前进行过滤。纵向样本表明微生物学在空间和时间上都具有稳定性，并且在处理厂和分配系统之间具有稳定性。消毒对微生物组成的影响最大，通过过滤进一步细化，并受到分配和前提管道的影响。放线菌属显示了治疗的趋势。特别是分枝杆菌属，在成品沃茨中非常低，在某些自来水沃茨中以高水平特异性地出现，表明分配和/或房屋管道是分枝杆菌的主要贡献者。军团菌属，另一个含有潜在机会致病菌的属也普遍存在。源水微生物学与自来水差异最大，处理的每一步都使样品更接近自来水沃茨。
The two municipal drinking water systems of New Orleans, LA, U.S.A. were sampled to compare the microbiology of independent systems that treat the same surface water from the Mississippi River. To better understand temporal trends and sources of microbiology delivered to taps, these treatment plants and distribution systems were subjected to source-to-tap sampling over four years. Both plants employ traditional treatment by chloramination, applied during or after settling, followed by filtration before distribution in a warm, low water age system. Longitudinal samples indicated microbiology to have stability both spatially and temporally, and between treatment plants and distribution systems. Disinfection had the greatest impact on microbial composition, which was further refined by filtration and influenced by distribution and premise plumbing. Actinobacteria spp. exhibited trends with treatment. In particular, Mycobacterium spp., very low in finished waters, occurred idiosyncratically at high levels in some tap waters, indicating distribution and/or premise plumbing as main contributors of mycobacteria. Legionella spp., another genus containing potential opportunistic pathogens, also occurred ubiquitously. Source water microbiology was most divergent from tap water, and each step of treatment brought samples more closely similar to tap waters.