Linking the Nitrogen and One-Carbon Cycles - The Impact of Inorganic Carbon Limitation on Ammonia Oxidation and Nitrogen Oxide Emission Rates in Ammonia Oxidizing Bacteria

Authors: Khunjar, W. O.; Jiang, D.; Murthy, S.; Wett, B.; Chandran, K.

Source: Proceedings of the Water Environment Federation, WEFTEC 2011: Session 51 through Session 60 , pp. 3199-3207(9)

Publisher: Water Environment Federation

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Abstract:

Experiments were performed to investigate the impact of inorganic carbon (IC) limitation on ammonia oxidizing bacteria (AOB). Results confirm that ammonia removal efficiency and AOB respiration rates are negatively impacted by IC limitation. Increased nitrogen oxides emissions (nitric and nitrous oxides (NO and N₂O)) were also observed in IC limited reactors as compared with control reactors. These findings suggest that the metabolic response of AOB to IC limitation can elicit a previously undocumented increase in nitrogen oxide emission. These results further support the recently postulated link between low ammonia oxidation process efficiency and increased NO and N₂O emissions.

Keywords: Ammonia Oxidizing Bacteria; Inorganic Carbon; Nitrous Oxide; Nitric Oxide

Document Type: Research article

DOI: http://dx.doi.org/10.2175/193864711802721848

Publication date: 2011-01-01

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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 These proceedings are not peer reviewed.

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