INTRICACIES OF MODELING THE EMERGING INTEGRATED FIXED-FILM ACTIVATED SLUDGE (IFAS) PROCESS

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

The Integrated Fixed-film Activated Sludge (IFAS) process is a technology that provides the means for effective nitrogen removal in a smaller footprint than those for conventional biological nitrification processes. It is particularly attractive for retrofitting carbonaceous-only activated sludge treatment plants as, in many cases, it can be added without the need for expanding reactor or clarifier volume. Improvements to the design of IFAS plants have been developed using process models based on the GPS-X Hybrid model, which was originally conceived for the Kaldnes Moving Bed Biofilm Reactor (MBBR), but contains all the features needed to model IFAS. The model was calibrated using pilot plant data. This paper presents the calibration steps along with typical operating data for the pilot plant. The paper also includes a discussion of the most pertinent calibration parameters, in particular the anoxic oxygen half-saturation coefficient and the hydrolysis rates used to calibrate nitrate concentrations. Nitrate concentrations measured in the pilot plant are much lower than would be predicted using a conventional activated sludge model, because of the high level of simultaneous nitrification and denitrification (SND) observed.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864703784641973

Publication date: January 1, 2003

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 These proceedings are not peer reviewed.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

Tools

Favourites

Share Content

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
X
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