Skip to main content

Operation and Performance of East Greenwich, Rhode Island Nitrogen Removal Filtration System to Achieve 5 mg/L

Buy Article:

$17.50 plus tax (Refund Policy)


In July 2001, the Rhode Island Department of Environmental Management and the Town of East Greenwich entered into a Consent Agreement to upgrade the 1.7 mgd wastewater treatment plant to meet a strict new seasonal total nitrogen limit of 5 mg/L. Utilizing proprietary Severn Trent Services treatment technology, Tighe & Bond, Inc. designed an innovative upgrade to reduce nutrient loading to Greenwich Cove, an important recreational area of Narragansett Bay.

The nitrogen removal system utilizes a tertiary two-stage, biological filtration process where ammonia is oxidized to nitrate (nitrification) in the first stage and the nitrate is subsequently reduced to nitrogen gas (denitrification) in the second stage. The nitrogen removal system initiated operation in April 2006 and the data collected during the three compliance periods of 2006, 2007, and 2008 indicate that the process performance of the system has been excellent. The WWTP successfully met the 5 mg/L total nitrogen limit during all compliance periods, including the colder weather month of May.

Keywords: Biological Aerated Filter; Denitrification Filter; Nitrogen Removal; Temperature

Document Type: Research Article


Publication date: January 1, 2009

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 These proceedings are not peer reviewed.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
  • ingentaconnect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect 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