drinking water discolouration Articles

  • Methodology for sampling drinking water discolouration loose deposits at low velocities

    The occurrence of discoloured water at the tap is one of the most frequent reasons for customers to complain. Water discolouration arises from the re-suspension of loose deposits (LD) that accumulate in drinking water pipes, due to velocity increase. Because of its typical brownish/reddish colour, discoloured water is traditionally perceived as a consequence of cast-iron pipe corrosion, even in ...


    By IWA Publishing

  • Linking discolouration modelling and biofilm behaviour within drinking water distribution systems

    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 ...


    By IWA Publishing

  • Hydrogel floc nature and biogenic constituents of drinking water discolouration deposits

    Loose deposits (LD) develop and accumulate in drinking water distribution systems' (DWDS) pipes and often lead to discolouration incidents, which are a major reason for customers' complaints. In addition, LD may accumulate contaminants, while discolouration may be accompanied by degradation of the water's microbiological quality. Along with iron oxides, organic compounds are ...


    By IWA Publishing

  • Multivariate data mining for estimating the rate of discolouration material accumulation in drinking water distribution systems

    Particulate material accumulates over time as cohesive layers on internal pipeline surfaces in water distribution systems (WDS). When mobilised, this material can cause discolouration. This paper explores factors expected to be involved in this accumulation process. Two complementary machine learning methodologies are applied to significant amounts of real world field data from both a ...


    By IWA Publishing

  • Modelling both the continual erosion and regeneration of discolouration material in drinking water distribution systems

    The erosion of the cohesive layers of particulate matter that causes discolouration in water distribution system mains has previously been modelled using the Prediction of Discolouration in Distribution Systems (PODDS) model. When first proposed, PODDS featured an unvalidated means by which material regeneration on pipe walls could be simulated. Field and laboratory studies of material ...


    By IWA Publishing

  • Biological iron and manganese removal, pilot and full scale applications

    Both manganese and iron are found in surface and ground waters at varying concentration levels. When present even at low concentrations they can be linked to the following problems: discolouration, turbidity and taste problems or form slime and iron noxide or manganese dioxide accumulations in pipes. Both metals promote the growth of certain types of chlorine tolerant micro-organisms in water ...

  • How & When We Measure Turbidity

    Turbidity, along with Suspended Solids, is a way of measuring the clarity of a body of water, and how many particles are affecting it. The difference is that while Suspended Solids describes the density of the materials in the water, Turbidity describes how those materials affect light passing ...


    By Partech (Electronics) Ltd.

  • Shining a Light on the Food and Beverage Industry

    As published in this months edition of Process & Control, Diane White discusses how UV systems can provide a practical, power saving alternative to pasteurisation in food and beverage production Waterborne micro-organisms are responsible for adverse effects on flavour, colour, odour and shelf life of products and, of course, potential health risks to consumers. A number of emerging ...


    By atg UV Technology

  • Case study - SOFI

    Liquid Sugar Disinfection atg UV Technology, market leaders in the Ultraviolet treatment industry have supplied SOFI, atg UV’s French distributors with three state-of-the-art, ultra compact SS-73-4 Ultraviolet disinfection systems for the treatment of sugar syrup solutions. The systems where supplied to a market leading Algerian food and beverage manufacture who required ...


    By atg UV Technology

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