Effects of early biofilm formation on water quality during commissioning of new polyethylene pipes

Published on 04/11/2023 | by Waterline Admin

Highlights

  • Mature biofilms are considered beneficial to non-chlorinated Danish drinking water distribution systems, as they increase the microbiological stability of the water.
  • During commissioning of new pipes, biofilms start developing on the new pipe wall, and are influenced by factors such as water quality, pipe material, flow velocity and presence of biofilm upstream.
  • The early stages of biofilm formation, prior to maturity, may impact water quality negatively and this is poorly understood.
  • This study measured microbiological water quality parameters upstream and downstream of a newly commissioned PE pipe.
  • High heterotrophic plate counts but low microbiological diversity was observed approximately 10 days after pipe commissioning.
  • Diversity increased to upstream levels by day 15 and  HPC decreased to upstream levels after 15–20 days.
  • This study highlights the importance of obtaining and maintaining a stable biofilm composed of natural bacteria originating from groundwater in pipes of non-chlorinated systems to improve water quality for consumers.  Optimizing pipe commissioning procedures can benefit the utility and it’s consumers.

 

LINK TO PAPER – CLICK HERE

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Grime Scene

ANNOUNCING OUR NEW GRIME SCENE COMPETITION:

Following on from the successful Grime Scene competition, we have decided to continue the theme for another year, but with a twist. This year, we are asking for photographs of the grimiest pictures you can find accompanied with another photograph of how the ‘scene’ has been improved by your maintenance or cleaning.


We will display the photographs in each of the Waterline editions throughout 2024. The ‘most improved’ picture will be chosen by WMSoc members via an online vote. The winner will receive a £25 Amazon Gift Voucher after the Winter 2024/25 edition has been published.


Please send your photographs to:
waterline@wmsoc.org.uk.


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