Skip to main content

IFAS Pilot Study for Cold Weather Nitrogen Reduction

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


Facing a new effluent total nitrogen discharge limit, the Town of Stafford Springs Connecticut chose to upgrade their Water Pollution Control Facility using a fixed media Integrated Fixed-Film/ Activated Sludge (IFAS) system. The IFAS media would allow a retrofit of the existing aeration basins for biological nutrient removal without having to add basin volume. The raw influent wastewater was a mixture of municipal and industrial wastes that included at high concentration of fibrous suspended solids from a local textile manufacturer. Because of the unusual nature of the wastewater, a pilot study was commissioned to confirm the design basis for the IFAS system. After good initial results, the pilot study was cut short due to operational difficulties associated with the fibrous influent. Other fixed media IFAS systems were studied to help confirm the design rate, and the Town decided to proceed with construction of the IFAS system in April of 2009.

Keywords: BioWeb; IFAS; integrated fixed-film activated sludge; nitrification

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 These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • 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