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Effects of dissolved oxygen and pH on nitrous oxide production rates in autotrophic partial nitrification granules

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/67732

Title: Effects of dissolved oxygen and pH on nitrous oxide production rates in autotrophic partial nitrification granules
Authors: Rathnayake, Rathnayake M.L.D. Browse this author
Oshiki, Mamoru Browse this author
Ishii, Satoshi Browse this author
Segawa, Takahiro Browse this author
Satoh, Hisashi Browse this author →KAKEN DB
Okabe, Satoshi Browse this author →KAKEN DB
Keywords: N2O emissions
autotrophic partial nitrification granule
dissolved oxygen effect
16S rRNA gene deep sequencing
N2O microsensor
Issue Date: Dec-2015
Publisher: Elsevier
Journal Title: Bioresource Technology
Volume: 197
Start Page: 15
End Page: 22
Publisher DOI: 10.1016/j.biortech.2015.08.054
PMID: 26318242
Abstract: The effects of dissolved oxygen (DO) and pH on nitrous oxide (N2O) production rates and pathways in autotrophic partial nitrification (PN) granules were investigated at the granular level. N2O was primarily produced by betaproteobacterial ammonia-oxidizing bacteria, mainly Nitrosomonas europaea, in the oxic surface layer (<200 μm) of the autotrophic PN granules. N2O production increased with increasing bulk DO concentration owing to activation of the ammonia (i.e., hydroxylamine) oxidation in this layer. The highest N2O emissions were observed at pH 7.5, although the ammonia oxidation rate was unchanged between pH 6.5 and 8.5. Overall, the results of this study suggest that in situ analyses of PN granules are essential to gaining insight into N2O emission mechanisms in a granule.
Rights: © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/67732
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 久

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