4.1 Article

Linking discolouration modelling and biofilm behaviour within drinking water distribution systems

期刊

WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
卷 16, 期 4, 页码 942-950

出版社

IWA PUBLISHING
DOI: 10.2166/ws.2016.045

关键词

biofilms; discolouration; mobilisation

资金

  1. Pennine Water Group EPSRC Platform Grant [EP/1029346/1]
  2. EPSRC [EP/I029346/1, EP/G029946/1] Funding Source: UKRI
  3. Engineering and Physical Sciences Research Council [EP/G029946/1, EP/I029346/1] Funding Source: researchfish

向作者/读者索取更多资源

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.

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