Skip to main content

Relationships Between Operational Conditions and Nitrogen Removal and Media Biofilm Accumulation in an IFAS Process Demonstration Study

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Recent changes in discharge regulations limiting the six James River (VA) Basin treatment plants operated by the Hampton Roads Sanitation District (HRSD) to an aggregate mass discharge of total nitrogen (TN) to 6,000,000 lbs/year by January 1, 2011 has prompted implementation of a strategy to reduce discharges from each of the six treatment plants. At the 16.7 MGD James River Wastewater Treatment Plant (JRTP) modification of the existing conventional activated sludge process to an integrated fixed-film activated sludge (IFAS) process is being considered to achieve a target effluent TN at this facility of approximately 8 mg/L (annual average). To better understand the capabilities of the process and to better design the IFAS system, an IFAS demonstration study at JRTP was conducted to evaluate nutrient removal, temporal and spatial accumulation of biomass on the media, media distribution in the aeration basin, and overall operational conditions and the effect on performance. To accomplish these objectives, one of the nine existing fully-aerobic conventional aeration basins with dedicated secondary clarification was converted to a 1.86 MGD (2.22 MGD max month) IFAS train in a modified Ludzack-Ettinger (MLE) configuration with a 50% fill plastic biofilm carriers in the aerobic zone. During the study, biomass concentrations on the biofilm carriers were monitored as well as nitrogen species concentrations in the IFAS reactor to quantify the nitrogen transformations occurring within the demonstration tank. It was observed that continuous monitoring of the biomass on the IFAS media is necessary for successful operation of IFAS system. The performance of the nitrogen removal process was identified through nitrogen species measurements across the demonstration tank and conducting nitrogen mass balances.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Biofilm carriers; IFAS

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
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