Skip to main content

Evaluation of the Single Sludge Deammonification Process for the Treatment of Plant Recycle Streams Containing a High Ammonium Concentration

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

An innovative biological process for the treatment of ammonium-rich plant recycle streams from the dewatering of anaerobically digested sludges ("centrate" or "rejection water") is being evaluated in North America in an unprecedented collaborative technology evaluation program between the New York City Department of Environmental Protection, the District of Columbia Water and Sewer Authority and the Alexandria Sanitation Authority. The technology is being evaluated as part of a broader program to identify reliable, cost-effective technologies for total nitrogen removal.

The process consists of a single-sludge suspended growth sequencing batch reactor called DEMON®, which is operated with pH-controlled intermittent aeration to provide aerobic and anoxic/anaerobic periods for nitritation and anaerobic ammonium oxidation (ANAMMOX) reactions (the complete process is referred to as "Deammonification"). The DEMON® process has been successfully implemented in full-scale facilities in Strass, Austria and Glarnerland, Switzerland; however, the collaborative project participants established a research program to understand the operating conditions that contribute to the stability (or threaten the stability) of the process. Specifically, the focus of the work has been on operating ranges for dissolved oxygen, pH, pH bandwidth, temperature, nitrite concentration and the maximum ammonium-N loading rate.

The results presented in the paper are the product of one-and-a-half years of work by the collaborative research project participants and were assembled to provide the reader with the status of the DEMON® process development and operational characteristics of the process. This project will continue into 2008 as further work is conducted on the defining procedures and/or technical options for recovering from operational upsets and accumulating a greater mass of anammox biomass for seeding larger systems for eventual full-scale implementation in North America.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics


Document Type: Research Article

Publication date: 2007-10-01

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