Skip to main content

Observations on the Performance and Modeling of Glycerin-fed Denitrification Filters

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


The objective of this investigation was to extend an earlier study (Bilyk et al., 2008) on applying the biofilm model to methanol-fed denitrification filters by simulating the performance of a glycerin-fed (MicroCglycerin™) denitrification filters at the Littleton Englewood Wastewater Treatment Facility in Colorado. The main focus of the effort was to calibrate to diurnal dynamic performance over one week of winter operation (average temperature 14.7°C). Fifteen-minute online flow and nutrient analyzer data was utilized to obtain a robust and accurate calibration. Another component of the modeling study was to assess the yield coefficient and heterotroph maximum specific growth rate parameters for MicroCglycerin™, which were validated through model calibration. Other observations of note are that the C:N ratio varied more than expected (2–10 kgCOD/kgN), and that the model predicted a significant amount of COD in the effluent, but this was much higher than what was actually observed. The C:N ratio and potential COD breakthrough is an area where further investigation is needed. Overall, the glycerin-fed filter at the LEWWTP worked very well and discharged a NOx-N concentration of about 1.5 mg/L, removing an impressive 19 mg/L of NOx-N on a daily basis. As previous work demonstrates (Ledwell et al, 2010), glycerin has been successfully utilized on denitrification filters provided the proper operational adjustments are made.

Keywords: Denitrification; carbon source; filter; glycerin; glycerol; methanol; modeling; nitrate removal

Document Type: Research Article


Publication date: January 1, 2011

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 These proceedings are not peer reviewed.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
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