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Effects of dissolved oxygen and pH on nitrous oxide production rates in autotrophic partial nitrification granules
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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)
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Submitter: 佐藤 久
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