Skip to main content

Controlling Gaseous Nitrogen Oxide Emissions and Nitrogen Removal Performance in Hollow Fiber Membrane-Aerated Biofilm Reactors

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

A hollow fiber membrane-aerated biofilm reactor (HFMBR) was operated at elevated temperature (30°C) and low bulk liquid dissolved oxygen (DO, <0.3 mg/l) to achieve nitritation from a synthetic, high-strength, nitrogenous wastewater. Rapid startup was achieved despite high ammonia concentrations and stable nitritation was obtained for ∼70 days, at which time nitrite oxidation was observed. Of the three corrective actions used to deter proliferation of nitrite-oxidizing bacteria (NOBs), decreased oxygenation via reduction of the lumen pressure appeared to be the most effective. Microbial population analysis via fluorescence in-situ hybridization (FISH) revealed biofilm aggregates throughout the reactor dominated by Betaproteobacterial ammonia-oxidizing bacteria (AOBs) hybridizing with probe Nso1225. Nitrospira genus NOBs hybridizing with probe Ntspa662 were present only at the most downstream sampling location in the reactor, where the biofilm developed latest in time when nitrite concentrations were high. Biomass sloughing and a pump failure resulted in conditions favorable for continued NOB proliferation. Nitrogen balancing revealed up to 10% of the ammonia oxidized was recovered as gaseous nitrogen oxide emissions in the outlet gas (N2O, NO, NO2). Two short-term corrective action experiments (increased oxygenation, elevated pH) were insufficient to mitigate these emissions, demonstrating an emerging challenge for implementing low DO nitritation systems for nutrient removal.
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: 01 January 2008

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 These proceedings are not peer reviewed.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