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Stabilité biologique d'un réseau de distribution alimenté avec une eau nanofiltrée

Abstract : The degradation of bacterial quality during transport of the water in a distribution network can be limit by the drastic decrease of dissolved organic matter and bacteria concentrations at the inlet of the system. This objective can be reached by using nanofiltration process. Results demonstrated that when a network, largely colonized by heterotrophic bacteria, is fed with nanofiltered water (low nutriments and low bacterial cells), (i) DOC concentrations, in the network, decrease quasi-immediately of 1 mg C L-1, (ii) BDOC concentrations are not measurable by the analytical method (< 0,1 mg C L-1) and (iii) the total number of bacterial cells decrease of a 2-fold factor after 6 weeks of feeding, and after one year densities of planktonic and fixed bacterial cells decrease of 1 log and 0,5 log, respectively. [...] Finally, in order to distribute biologically stable water, we must drastically remove nutrients and bacterial cells at the inlet of the drinking water distribution network. It seems to be necessary of disinfect the network if we want to limit the persistence/adaptation of accidental bacterial contamination.
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Submitted on : Thursday, March 29, 2018 - 11:00:40 AM
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  • HAL Id : tel-01747465, version 1



Isabelle Sibille. Stabilité biologique d'un réseau de distribution alimenté avec une eau nanofiltrée. Chimie. Université Henri Poincaré - Nancy 1, 1997. Français. ⟨NNT : 1997NAN12161⟩. ⟨tel-01747465⟩



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