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Drinking Water Engineering and Science An interactive open-access journal
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Volume 3, issue 1
Drink. Water Eng. Sci., 3, 79-90, 2010
https://doi.org/10.5194/dwes-3-79-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: HQw '09 – Removal of organics

Drink. Water Eng. Sci., 3, 79-90, 2010
https://doi.org/10.5194/dwes-3-79-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  17 Jun 2010

17 Jun 2010

Water quality and treatment of river bank filtrate

W. W. J. M. de Vet1,2,3, C. C. A. van Genuchten2, M. C. M. van Loosdrecht1, and J. C. van Dijk3 W. W. J. M. de Vet et al.
  • 1Dept. of Biotechnology, Delft Univ. of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
  • 2Oasen Drinking Water Company, P.O. Box 122, 2800 AC Gouda, The Netherlands
  • 3Dept. of Water Management, Delft Univ. of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands

Abstract. In drinking water production, river bank filtration has the advantages of dampening peak concentrations of many dissolved components, substantially removing many micropollutants and removing, virtually completely, the pathogens and suspended solids. The production aquifer is not only fed by the river bank infiltrate but also by water percolating through covering layers. In the polder areas, these top layers consist of peat and deposits from river sediments and sea intrusions.

This paper discusses the origin and fate of macro components in river bank filtrate, based on extensive full-scale measurements in well fields and treatment systems of the Drinking Water Company Oasen in the Netherlands. First, it clarifies and illustrates redox reactions and the mixing of river bank filtrate and PW as the dominant processes determining the raw water quality for drinking water production. Next, full-scale results are elaborated on to evaluate trickling filtration as an efficient and proven one-step process to remove methane, iron, ammonium and manganese. The interaction of methane and manganese removal with nitrification in these systems is further analyzed. Methane is mostly stripped during trickling filtration and its removal hardly interferes with nitrification. Under specific conditions, microbial manganese removal may play a dominant role.

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