Skip to main content

Enhancing Nitrification in an Oil Refinery WWTP with IFAS

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


The Frontier Oil refinery in Cheyenne, WY had a great deal of trouble meeting a new effluent permit limit of 2.18 mg/l monthly average ammonia nitrogen, mainly due to large fluctuations in the strength and type of influent wastewater. The company decided to become the first documented oil refinery in the United States to use the Integrated Fixed-Film/Activated Sludge process to upgrade their exisitng WWTP for better nitrification. Frontier added 240 m3 (16% fill fraction) of high surface area plastic carrier elements to each of their two parallel activated sludge aeration basins, and have since acheived consistant nitrification despite several major refinery process changes and corresponding wastewater plant upsets.

Document Type: Research Article


Publication date: 2008-01-01

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 These proceedings are not peer reviewed.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 ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree 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