DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yoon, Sukhwan | - |
dc.contributor.advisor | 윤석환 | - |
dc.contributor.author | Song, Min Joon | - |
dc.date.accessioned | 2022-04-15T07:20:04Z | - |
dc.date.available | 2022-04-15T07:20:04Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=956370&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/294843 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 건설및환경공학과, 2021.2,[viii, 165 p. :] | - |
dc.description.abstract | Natural and engineered systems are substantial N$_2$O source, potent greenhouse gas. AOB-induced NH$_3$ oxidation is a major biological N$_2$O-genearing pathway and multiple biotic and abiotic mechanisms have been suggested to be responsible for AOB-mediated N$_2$O production. This thesis revealed the novel mechanism of enzymatic and non-enzymatic N$_2$O production from AOB-driven NH$_3$ oxidation at three different eco-systems. The first study revealed the enhancement effect of PO$_4^{3-}^-P abundance on N$_2$O yields from abiotic NH$_2$OH decomposition using biotic and abiotic lab-scale incubation and soil microcosm, which may have substantial implications to N$_2$O emissions from extracellular NH$_2$OH release by AOB-mediated NH$_3$ oxidation in PO$_4^{3-}$-rich soils (e.g. soil exposed by animal excreta). Moreover, three novel effectors were identified to have significant contribution on N$_2$O emission from oxic and anoxic tanks of activated sludge at full-scale WWTPs using random forest, which also indicated the predominant N$_2$O production from oxic unit via aerobic AOB-mediated NH$_2$OH oxidation pathway. Furthermore, considering that AOB and heterotrophic denitrifying bacteria co-thrive in PN-AMX system, we showed that the substantial impacts of interspecies interaction between AOB and heterotrophic denitrifying bacteria on the elevated N$_2$O production, where NH$_2$OH extracellularly secreted from AOB-induced NH$_3$ oxidation stimulated N$_2$O production from aerobic NO$_2^-$-mediated reduction of heterotrophic denitrifying bacteria. Overall, these findings may contribute to resolve the uncertainty unfeasible to track N$_2$O generation pathway using conventional N$_2$O-producing mechanism. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Greenhouse gas▼aNitrous oxide▼aAmmonia oxidation▼aAmmonia oxidizing bacteria▼aBiotic and abiotic mechanism▼aSoil▼aActivated sludge▼aPartial nitritation/anammox | - |
dc.subject | 온실가스▼a아산화질소▼a암모니아 산화▼a암모니아 산화균▼a생물학적/비생물학적 메커니즘▼a토양▼a활성슬러지▼a부분질산화/아나목스 | - |
dc.title | Biotic and abiotic mechanisms affecting N2O production from biological ammonia oxidation in natural and engineered systems | - |
dc.title.alternative | 자연계와 인위계의 생물학적 암모니아 산화로부터 기인되는 생물학적/비생물학적 아산화질소 생성 메카니즘 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :건설및환경공학과, | - |
dc.contributor.alternativeauthor | 송민준 | - |
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