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Assessing the transition effects in a drinking water distribution system caused by changing supply water quality: an indirect approach by characterizing suspended solids

机译：评估由于供水水质变化而引起的饮用水分配系统的过渡效应：表征悬浮固体的间接方法

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摘要

Worldwide, it is common that the drinking water distribution systems (DWDSs) may be subjected to changes of supply water quality due to the needs of upgrading the treatment processes or switching the source water. However, the potential impacts of quality changed supply water on the stabilized ecological niches within DWDSs and the associated water quality deterioration risks were poorly documented. In the present study, such transition effects caused by changing the supply water quality that resulted from destabilization of biofilm and loose deposits in DWDS were investigated by analyzing the physiochemical and microbiological characteristics of suspended particles before (T-0), during (T3-weeks) and after upgrading the treatments (T6-months) in an unchlorinated DWDS in the Netherlands. Our results demonstrated that after 6 months' time the upgraded treatments significantly improved the water quality. Remarkably, water quality deterioration was observed at the initial stage when the quality-improved treated water distributed into the network at T3-weeks. observed as a spike of total suspended solids (TSS, 50-260%), active biomass (ATP, 95-230%) and inorganic elements (e.g. Mn, 130-250%). Furthermore, pyrosequencing results revealed sharp differences in microbial community composition and structure for the bacteria associated with suspended particles between To and T3-weeks, which re-stabilized after 6-months at To-months. The successful capture of transition effects was especially confirmed by the domination of Nitrospira spp. and Polaromonas spp. in the distribution system at T3-weeks, which were detected at rather low relative abundance at treatment plant. Though the transitional effects were captured, this study shows that the introduction of softening and additional filtration did not have an effect on the water quality for the consumer which improved considerably after 6-months' period. The methodology of monitoring suspended particles with MuPFiSs and additional analysis is capable of detecting transitional effects by monitoring the dynamics of suspended particles and its physiochemical and microbiological composition. (C) 2019 The Authors. Published by Elsevier Ltd.
机译：在全球范围内，由于需要升级处理工艺或更换原水，饮用水分配系统（DWDS）可能会受到供水水质变化的影响。但是，质量变化对自来水公司内部稳定的生态位的潜在影响并不完整，相关的水质恶化风险也没有得到充分记录。在本研究中，通过分析（T-0）之前，（T3周内）悬浮颗粒的理化和微生物学特征，研究了由于DWDS中生物膜失稳和沉积物疏松而引起的供水水质变化引起的这种过渡效应。 ），并在荷兰升级了无氯DWDS中的处理（T6个月）后。我们的结果表明，经过6个月的时间升级处理后，水质明显改善。值得注意的是，在初始阶段，当经过质量改进的处理水在T3周分配到网络中时，观察到水质恶化。观察到总悬浮固体（TSS，50-260％），活性生物质（ATP，95-230％）和无机元素（例如Mn，130-250％）的峰值。此外，焦磷酸测序结果显示，在To和T3周之间，与悬浮颗粒相关的细菌的微生物群落组成和结构存在显着差异，在To-month 6个月后重新稳定。 Nitrospira spp的统治尤其证实了成功捕获过渡效应。和北极星属。在T3周的分配系统中检测到，在处理厂以相对较低的相对丰度检测到。尽管捕获了过渡效果，但这项研究表明，引入软化和附加过滤不会对消费者的水质产生影响，在六个月的使用期后，消费者的水质有了很大改善。用MuPFiSs监测悬浮颗粒并进行其他分析的方法能够通过监测悬浮颗粒的动力学及其理化和微生物组成来检测过渡效应。 （C）2019作者。由Elsevier Ltd.发布

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  • 来源
    《Water Research》 |2020年第1期|115159.1-115159.10|共10页
  • 作者

    Chen Lihua; Ling Fangqiong; Bakker Geo; Liu Wen-Tso; Medema Gertjan; van der Meer Walter; Liu Gang;

  • 作者单位

    Chinese Acad Sci Res Ctr Ecoenvironm Sci Key Lab Drinking Water Sci & Technol Beijing 100085 Peoples R China|Delft Univ Technol Fac Civil Engn & Geosci Dept Water Management Sanit Engn POB 5048 NL-2600 GA Delft Netherlands;

    Washington Univ Sch Engn & Appl Sci Dept Energy Environm & Chem Engn St Louis MO 63130 USA;

    Vitens NV POB 1205 NL-8001 BE Zwolle Netherlands;

    Univ Illinois Dept Civil & Environm Engn 205 N Mathews Ave Urbana IL 61801 USA;

    Chinese Acad Sci Res Ctr Ecoenvironm Sci Key Lab Drinking Water Sci & Technol Beijing 100085 Peoples R China|KWR Watercycle Res Inst POB 1072 NL-3430 BB Nieuwegein Netherlands;

    Oasen Water Co POB 122 NL-2800 AC Gouda Netherlands|Univ Twente Sci & Technol POB 217 NL-7500 AE Enschede Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Upgrading treatments; Drinking water distribution system; Transition effects; Suspended solids; Water quality deterioration risks;

    机译：升级治疗;饮用水分配系统;过渡效果;悬浮固体;水质恶化的风险;

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