Skip to main content

Yosemite National Park – Innovative Solutions to Eliminate Chlorine Gas Wastewater Disinfection Hazard

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The paper describes the process of evaluating disinfection alternatives to eliminate the chlorine gas disinfection system at the El Portal Wastewater Treatment Facility that serve Yosemite National Park. The disinfection alternatives considered included ozonation, sodium hypochlorite, and UV disinfection. Based on the evaluation of the available alternatives it was concluded that UV disinfection was the preferred option. The project components included modification of an existing chlorine contact tank to a new UV disinfection channel, providing necessary instrumentation and control features to provide fully automated operation, and connecting the new UV system to an existing diesel stand-by power generator. One of the key design approaches included evaluation of the major daily flow variations and seasonal flow changes, to ensure that the required effluent criteria are met at all plant operating conditions and to optimize the design of the UV system.

The paper also highlights some of the major design issues applied to achieve the required effluent criteria and to minimize impacts to existing plant operations during construction of new facilities. The UV disinfection system was designed to adjust UV lamp output automatically to provide the appropriate UV dose while minimizing power consumption. Since this project was a retrofit of the exiting facility, which must be operated during construction of the new UV system, an evaluation of the construction mitigation measures and plant operation during construction, to achieve adequate disinfection at all times was also undertaken.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2005-01-01

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 These proceedings are not peer reviewed.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
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