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- W2891296677 abstract "Safe drinking water is essential for human health and its provision in a changing climate is a globalpressing problem. Research communities, governments and drinking water supplying companies areworking on improving the quality of drinking water and reducing its cost. Microorganisms colonisethe inner surfaces of pipes and form biofilms. In drinking water systems biofilms are problematic asthey cause loss of disinfectants, harbour pathogens and affect the aesthetics of drinking water. Fromthe engineering perspective, that leads to corrosion of the pipe’s material and reduced life of theexisting infrastructure. Thus, it is imperative that we gain a deeper understanding of the growth ofbiofilms if we are to develop effective strategies for their removal or control.In this study we focused on the growth of biofilms in drinking water under stagnant conditions, whichoften occur in parts of drinking water pipes. A bioreactor was used to simulate the service lines ofdrinking water systems. After 4 weeks, the thickness and density of the biofilms were characterisedusing gravimetric measurements, and their surface area was determined using fluorescencemicroscopy. Also, the concentration of cells and microcolonies both in the bulk water and on thereactor surfaces was determined using fluorescence microscopy. Finally, spatial statistics were usedto describe the biofilm structures that were formed on the exposed surfaces of the reactor. It wasrevealed that even under stagnant and oligotrophic conditions, drinking water bacteria moved fromthe bulk water of the reactor and attached to the available surfaces forming a high number ofmicrocolonies. Biofilms were able to grow on the exposed surfaces of the reactor formingcharacteristic structures consisting of dense cell clusters. Our results revealed that even underunfavourable conditions biofilms can grow within our drinking water systems." @default.
- W2891296677 created "2018-09-27" @default.
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- W2891296677 date "2018-07-01" @default.
- W2891296677 modified "2023-09-27" @default.
- W2891296677 title "Biofilm Growth in Drinking Water Systems under Stagnant Conditions" @default.
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