Skip to main content

Simultaneous Clarification and Endogenous Post Denitrification by Up-flow Through a Layer of Floating Media

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


Low Total-Nitrogen (TN) requirements in wastewater treatment effluents, eventually require a post denitrification step. This is commonly done by addition of an external carbon source, which adds to the cost of wastewater treatment. Some work has been done in recent years on different methods for onsite production of suitable carbon source, by fermenting primary sludge or secondary sludge. In this work an attached growth pilot system, wherein plastic biomass carriers are aerobically mixed, was operated to treat municipal wastewater. The effluent, generally having less than 200 mg/l TSS, was directly passed through an un-aerated layer of similar media, in which most of the suspended solids were retained, and could be controllably discharged. Most probably due to endogenous decay below and within the layer of media, nitrate was removed to very low levels at retention times of about 3 hours. The main design and operation issue is sludge wasting, still being optimized.

Document Type: Research Article


Publication date: January 1, 2007

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 These proceedings are not peer reviewed.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
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