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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

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

Document Type: Research Article

Publication date: 2011-01-01

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