Linking discolouration modelling and biofilm behaviour within drinking water distribution systems
Linking discolouration modelling and biofilm behaviour within drinking water distribution systems
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DOI：
10.2166/ws.2016.045
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发表时间：
2016-08-01
影响因子：
--
通讯作者：
Boxall, J.
中科院分区：
文献类型：
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作者：
Husband, S.;Fish, K. E.;Boxall, J.
高质量的饮用水已经从现代化的处理厂中排出，但在饮用水分配系统中，诸如变色之类的水质退化仍在继续发生。在全球范围内观察到变色，这表明尽管来源、处理、消毒和网络配置存在差异，但有一个共同的过程。变色的主要原因已被确定为颗粒材料从管壁的动员和验证的预测变色的分配系统（PODDS）模型使用可测量的网络水力学来模拟这种反应。在本文中的变色材料的内聚特性进行了探讨，它是假设，在模拟浊度响应，PODDS模型实际上是描述的发展和内聚强度行为的生物膜。因此，应用这一概念可以促进DWDS生物膜活性的快速和简单的评估。从国际上进行的PODDS研究的结果进行审查，侧重于宏观或可观察到的变色方面。这些进行了比较，并与相关的生物膜的研究，认为变色材料在微观尺度。结合这些（过去）的研究结果，以提高微生物生态和变色之间的相互作用的理解进行了讨论，以期DWDS的运营策略，保障和优化饮用水供应。
High quality drinking water exits modern treatment works, yet water quality degradation such as discolouration continues to occur within drinking water distribution systems (DWDS). Discolouration is observed globally, suggesting a common process despite variations in source, treatment, disinfection and network configurations. The primary cause of discolouration has been identified as mobilisation of particulate material from pipe walls and the verified Prediction of Discolouration in Distribution Systems (PODDS) model uses measurable network hydraulics to simulate this response. In this paper the cohesive properties of discolouration material are explored and it is hypothesised that in simulating the turbidity response, the PODDS model is actually describing the development and cohesive strength behaviour of biofilms. Applying this concept can therefore facilitate a rapid and simple assessment of DWDS biofilm activity. A review of the findings from PODDS studies conducted internationally is presented, focussing on the macro or observable aspects of discolouration. These are compared and contrasted with associated biofilm studies which consider discolouration material at the micro-scale. Combining the results from these (past) studies to improve the understanding of interactions between microbial ecology and discolouration are discussed with a view to DWDS operational strategies that safeguard and optimise drinking water supply.