Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The inhibition effects of total ammonia nitrogen (TAN) on acetotrophic methanogenic activity using biomass from two thermophilic anaerobic reactors were investigated in this study. The biomass was acclimated at different background levels of TAN before Anaerobic Toxicity Assay (ATA) were conducted. The TAN background concentrations in the reactors were 400, and 1,200 mg/L. The digester operated with a TAN concentration of 400 mg/L, showed a similar system performance to the digester operated at a TAN of 1,200 mg/L in terms of chemical oxygen demand (COD) removal and methane yield. The results from the ATA indicated: 1) The TAN concentrations higher than 2,000 and 4,000 mg/L began to cause inhibition on acetotrophic methanogens of the biomass from the reactors acclimated to the TAN concentrations of 400 and 1,200 mg/L, respectively. 2) The lethal TAN concentration of methanogens was approximately 10,500 mg/L, independent of pH and background TAN concentrations. 3) At a constant TAN concentration, methanogenic activities varied with the pH values. The highest methanogenic activities were observed at pH of 7.5 for the biomass from both reactors. 4) It was also observed that methanogenic activities at TAN of 400 mg/L were consistently lower comparing to the biomass acclimated to 1,200 mg/L of TAN.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2001-01-01

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 These proceedings are not peer reviewed.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