Skip to main content

Paris, France – City of “UV“ Light CFD Modeling as a Design Evaluation Tool for UV System Retrofit

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The city of Paris, France is implementing Ultraviolet (UV) disinfection at the discharge of the Orly and Joinville drinking water treatment plants (WTPs) with the primary goal to limit the production of bromates (KBrO3, NaBrO3) during disinfection of the source water using the existing Ozonation process. The proposed UV system design consists of two closed vessel, cross-flow Medium Pressure (MP) UV reactors arranged in series for each filter cell at the Orly WTP and a single closed vessel, cross-flow MP UV reactor per filter cell at the Joinville WTP. Each UV treatment train is identical and equipped with both an upstream isolation valve and a downstream flow regulating valve.

A Computational Fluid Dynamics (CFD) modeling study was conducted in order to analyze the predicted disinfection performance of the UV systems, noting that the proposed piping configuration differed from the bioassay validated configuration and typical recommendations from both the DVGW W294 and USEPA UVDGM guidelines. The CFD modeled dose values meet or exceed the design requirements for all conditions. The proximity of the isolation and flow regulating valves to the UV reactors does not compromise the disinfection performance of the UV trains. The addition of the UV reactors at the discharge of the filter cells does not increase headloss beyond the maximum limits specified for this project confirming that operation and performance of the upstream filters will not be disturbed.

A sensitivity study was conducted encompassing parameters that are essential to the accuracy of the CFD modeling procedure employed. Based on the results of this sensitivity analysis the CFD modeled dose values initially obtained may be slightly over-estimated. However, the CFD predicted UV dose always underestimates the actual UV dose as obtained from bioassay validation testing. The proposed CFD modeling procedure used to model the UV systems for the Orly and Joinville WTPs yields a conservative estimate of the UV reactors bioassay validated performance irrespective of the settings that were changed during the parameter sensitivity study.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Computational Fluid Dynamics; UV Disinfection

Document Type: Research Article

Publication date: 2009-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more