Gjornâl Furlan des SiencisFriulian Journal of Science

No. 36 (2023): GFS
RESEARCH ARTICLES

Study of the Formation-Distribution of Chlorite and Chlorate from Chlorine Dioxide in a Water Distribution Network: the Case Study of Udine

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  • FEDERICO SPIZZO,
  • DANIELE GOI,
  • SABINA SUSMEL
FEDERICO SPIZZO
Polytechnic Department of Engineering and Architecture, University of Udine, Udine, Italy.
DANIELE GOI
Polytechnic Department of Engineering and Architecture, University of Udine, Udine, Italy.
SABINA SUSMEL
Department of Agrifood, Environmental and Animal Sciences, University of Udine, Udine, Italy.

Keywords

  • Disinfection by-products,
  • Chlorine dioxide,
  • EPANET-MSX

How to Cite

[1]
SPIZZO, F., GOI, D. and SUSMEL, S. 2023. Study of the Formation-Distribution of Chlorite and Chlorate from Chlorine Dioxide in a Water Distribution Network: the Case Study of Udine. Friulian Journal of Science. 36, 36 (Dec. 2023), 19–27.

Abstract

To ensure water quality and to avoid bacterial contamination in Drinking Water Distribution Systems (DWDS), disinfection is conducted in drinking awater treatment plants. Disinfectant concentration in DWDS decreases with time while, due to chemical reactions with dissolved and particulate matter, biofilm and pipe wall material, disinfection by-product (DBP) formation increases. Chlorine-based disinfection methods are the most commonly used and, if chlorine dioxide is used as a disinfectant, chlorite and chlorate can be produced as DBPs. This study evaluates with a simulation model (EPANET MSX) the formation and distribution of chlorite and chlorate in the water distribution system of Udine, which is disinfected with chlorine dioxide. Having an integrated chemical-hydraulic model can, in fact, improve water utilities network management both in standard and special conditions. The results obtained with the simulation model were only minimally different to the concentration values measured on site, hence it can be assumed that they may be used for several conditions in order to make predictions.

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