Skip to main content

The Impact of Post Anoxic Dissolved Oxygen Concentrations on nitrous Oxide Emissions in Nitrification Processes

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

Abstract:

Emissions of nitrous oxide (N2O) from wastewater treatment plants have become a prominent field of study in terms of emissions inventories and mechanisms behind their production. This study aims to analytically determine the impact of select recovery dissolved oxygen (DO) concentrations on N2O emissions from a nitrifying enrichment culture, subjected to a 6 hour anoxic period followed by a recovery aeration period. This study examined three different recovery DO set points, a low value of 0.8mg/L, an intermediate value of 2mg/L, and a high value of 3mg/L. As such, three different N2O emissions profiles were produced illustrating the distinct response of the microbial cultures to the imposition of a transient anoxic period and subsequent ammonia accumulation vis-à-vis N2O emissions. Higher emissions were observed at the higher recovery DO values of 2.0 and 3.0 mg O2/L. Based on proposed metabolic pathways for autotrophic ammonia oxidation, N2O emissions in response to anoxic-oxic transients appear to be linked to interim hydroxylamine accumulation and subsequent oxidation either to nitrite or nitric oxide.

Keywords: biological nitrogen removal; emissions; nitrification process; nitrous oxide

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802766506

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 These proceedings are not peer reviewed.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
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
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