The Effects of Changing Water Flow Velocity on the Formation of Biofilms and Water Quality in Pilot Distribution System Consisting of Copper or Polyethylene Pipes

The Effects of Changing Water Flow Velocity on the Formation of Biofilms and Water Quality in Pilot Distribution System Consisting of Copper or Polyethylene Pipes

The effects of changing water flow velocity on the formation of biofilms and water quality in pilot distribution system consisting of copper or polyethylene pipers were determined. The formation of biofilms increased with the flow velocity of water. The increase in microbial numbers and contents of...

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Veröffentlicht in:Water research (Oxford) 2006-06, Vol.40 (10), p.2151-2151
Hauptverfasser: Lehtola, Markku J, Laxander, Michaela, Miettinen, Ilkka T, Hirvonen, Arja, Vartiainen, Terttu, Martikainen, Pertti J
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container_end_page 2151
container_issue 10
container_start_page 2151
container_title Water research (Oxford)
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creator Lehtola, Markku J
Laxander, Michaela
Miettinen, Ilkka T
Hirvonen, Arja
Vartiainen, Terttu
Martikainen, Pertti J
description The effects of changing water flow velocity on the formation of biofilms and water quality in pilot distribution system consisting of copper or polyethylene pipers were determined. The formation of biofilms increased with the flow velocity of water. The increase in microbial numbers and contents of ATP was clearer in the PE pipes than in the copper pipes. This indicated that the mass transfer of nutrients was in major role in the growth of biofilms. However, the increased biomass of biofilms did not affect microbial numbers in the water. Rapid changes in water flow rate resuspended biofilms and sediments, which increased the concentrations of bacteria and copper in water. The disturbance caused by the changing water flow was also seen as an increase in the particle counts and water turbidity recorded with online instrumentation.
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title The Effects of Changing Water Flow Velocity on the Formation of Biofilms and Water Quality in Pilot Distribution System Consisting of Copper or Polyethylene Pipes
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