Investigating aftergrowth potential of polymers in drinking water – the effect of water replacement and temperature: Manuscript

    Research output: Working paperResearch

    Abstract

    The aftergrowth potential of polymers used in drinking water distribution was investigated by a batch set-up, where test pieces were incubated in biostable, inorganic nutrient amended drinking water inoculated with surface water. Biomass production was measured as ATP and followed over 16 weeks in the water phase and on the material surface. Supplementary measurements of
    HPC and NVOC were applied when investigating the biostability within the test system, and the effect of water replacement and temperature. Addition of inorganic nutrients and inoculum to the biostable drinking water had no significant effect on the aftergrowth potential of the water. The background biomass production could be affected by the choice of caps for the test bottles,
    since ‘blue caps’ of polyethylene leached significant amounts of AOCP17 compared to ‘red caps’ containing teflon inlayers. There was no or only slightly difference on the biomass production of no replacement of the test water, replacement once a week or every second week. Periodical water replacement could nevertheless be considered beneficial, since a substantial NVOC
    migration occurred within the first six weeks of incubation, which potentially could affect the bacterial growth. Temperatures of 10ºC and 25ºC had no significant effect on the migration of bioavailable organic compounds, but there were a tendency for higher migration at 10ºC than at 25ºC.
    Original languageEnglish
    PublisherDTU Environment
    Number of pages12
    Publication statusPublished - 2004

    Keywords

    • Polymers
    • Drinking water
    • Bacteria growth
    • ATP
    • AOC

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