Impacts of temperature and hydraulic regime on discolouration and biofilm fouling in drinking water distribution systems
Impacts of temperature and hydraulic regime on discolouration and biofilm fouling in drinking water distribution systems
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温度和水力状况对饮用水分配系统变色和生物膜污垢的影响
DOI：
10.1371/journal.pwat.0000033
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
J. Boxall
中科院分区：
文献类型：
--
作者：
K. Fish;R. Sharpe;C. Biggs;J. Boxall
变色是客户对饮用水质量不满的最大原因，可能掩盖其他故障，包括可能影响公众健康和福祉的微生物问题。在研究季节温度变化和水力制度的影响和相互作用的同时，研究了饮用水分配系统（DWDS）中生物膜（复杂微生物群落）和变色之间的理论联系。通过使用温度控制的全尺寸分布实验设施，确保了结果可转移到可操作的DWDS。这样就可以分离出感兴趣的因素，并结合物理、化学和微生物分析。与较冷的温度（冬季，8°C）相比，较暖的温度（夏季，16°C）下观察到更大的变色和生物膜细胞积累，这表明微生物是DWDS变色行为的重要驱动因素。温度通常比水力制度施加的剪切应力对变色和生物膜细胞体积的影响更大，水力制度包括三种稳态和两种不同的流动模式。然而，趋势是复杂的，表明在控制微生物积累和变色的两个参数之间的相互作用。这些结果对我们老化的水处理系统基础设施的可持续管理具有重要意义，以提供安全、高质量的饮用水。通过提供新的证据表明变色是一个生物膜/微生物介导的过程，我们可以更好地理解针对炎热季节进行干预的重要性，以及操纵水力条件（我们可以控制），以尽量减少即将发生的气候变化对水质的长期影响。
Discolouration is the greatest cause of customer dissatisfaction with drinking water quality, potentially masking other failures, including microbial issues, which can impact public health and well-being. The theorised association between biofilms (complex microbial communities) and discolouration within drinking water distribution systems (DWDS) was explored, whilst studying the impact and interactions of seasonal temperature variations and hydraulic regime. Transferability of findings to operational DWDS was ensured by using a temperature controlled, full-scale distribution experimental facility. This allowed isolation of the factors of interest, with integration of physical, chemical and microbial analyses. Greater discolouration and biofilm cell accumulation was observed under warmer (summer, 16°C) temperatures compared to cooler (winter, 8°C), evidence of microbiology being an important driver in DWDS discolouration behaviour. Temperature was generally more influential upon discolouration and biofilm cell volumes than the shear stress imposed by the hydraulic regimes, which included three steady state and two varied flow patterns. However, the trends were complex, indicating interactions between the two parameters in governing microbial accumulation and discolouration. These results are important in informing sustainable management of our ageing DWDS infrastructure to deliver safe high quality drinking water. By providing new evidence that discolouration is a biofilm/microbiologically-mediated process, we can better understand the importance of targeting interventions to hotter seasons, and manipulating hydraulic conditions (which we can control), to minimise the long-term impacts of impending changing climates on water quality.
影响因子：
--
作者：
Husband, S.;Fish, K. E.;Boxall, J.
通讯作者：
Boxall, J.
关于水力瞬变如何导致饮用水分配系统内物质流动的实验研究。
影响因子：
12.8
作者：
Weston SL
通讯作者：
Weston SL
用于估计饮用水分配系统中变色物质积累率的多变量数据挖掘
影响因子：
2.7
作者：
Boxall J
通讯作者：
Boxall J