Skip to main content

Shelter From The Storm: Integrated Fixed Film Activated Sludge Protects Nitrifiers From Toxic Upsets

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial

Abstract:

The potential benefits of integrated fixed film activated sludge (IFAS) with respect to protecting against chemical inhibitors of nitrification were evaluated in a pilot-scale study. Parallel IFAS and non-IFAS (Control) trains in A2O configurations were fed primary effluent from a full scale system. Chemical inhibition was evaluated in batch tests of both suspended phase (activated sludge) and attached phase (biofilm on IFAS media) samples. Attached biomass from a downstream aerobic reactor had approximately 50% greater specific rates of nitrification than either suspended phase biomass. Attached biomass was consistently more resistant to chemical inhibition than was suspended phase biomass for all chemicals tested. For example, at 0.2 mg copper/L, the Control system experienced 53% inhibition, while both of the IFAS attached growth phases experienced only 13 to 14% inhibition. These results suggest that IFAS systems may be useful for providing greater process stability due to increased resistance to inhibition.

Keywords: Integrated fixed film activated sludge; ammonia; inhibition; nitrate; nitrification; process stability; toxic chemicals

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864710798158085

Publication date: January 1, 2010

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 These proceedings are not peer reviewed.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
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
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