来自水处理厂(WTP)的合格成品水可能在饮用水分配系统(DWDS)的运输过程中变色和变质,严重影响自来水水质。由于管道腐蚀和腐蚀水垢的不稳定,经常发生这种水稳定性问题。本文对DWDS中的管道腐蚀进行了全面的综述,包括腐蚀过程,腐蚀垢的形成,DWDS中的影响因素和监测技术。就腐蚀过程而言,腐蚀发生,发展机制,目前应用的化验,并总结了用于确定腐蚀可能性的指标,以及化学和细菌的影响。在水垢形成方面,讨论了腐蚀性质和结垢形成机理的解释,并说明了其典型的多层结构。此外,综合讨论了水质和微生物活性对水垢转化的影响。还总结了属水平的腐蚀相关细菌及其相关的腐蚀机理。这篇综述有助于加深目前对DWDS中管道腐蚀和水垢形成的理解,为供水公用事业提供指导,以确保采取有效措施保持水质稳定和保证饮用水安全。
The qualified finished water from water treatment plants (WTPs) may become discolored and deteriorated during transportation in drinking water distribution systems (DWDSs), which affected tap water quality seriously. This water stability problem often occurs due to pipe corrosion and the destabilization of corrosion scales. This paper provides a comprehensive
review of pipe corrosion in DWDSs, including corrosion process, corrosion scale formation, influencing factors and monitoring technologies utilized in DWDSs. In terms of corrosion process, corrosion occurrence, development mechanisms, currently applied assays, and indices used to determine the corrosion possibility are summarized, as well as the chemical and bacterial influences. In terms of scale formation, explanations for the nature of corrosion and scale formation mechanisms are discussed and its typical multilayered structure is illustrated. Furthermore, the influences of water quality and microbial activity on scale transformation are comprehensively discussed. Corrosion-related bacteria at the genus level and their associated corrosion mechanism are also summarized. This
review helps deepen the current understanding of pipe corrosion and scale formation in DWDSs, providing guidance for water supply utilities to ensure effective measures to maintain water quality stability and guarantee drinking water safety.