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DC Field | Value | Language |
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dc.citation.number | 2 | - |
dc.citation.startPage | 200010 | - |
dc.citation.title | ENVIRONMENTAL ENGINEERING RESEARCH | - |
dc.citation.volume | 26 | - |
dc.contributor.author | Nguyen Thi Minh | - |
dc.contributor.author | Choi, Minkyu | - |
dc.contributor.author | Park, Nohback | - |
dc.contributor.author | Bae, Hyokwan | - |
dc.date.accessioned | 2023-12-21T15:53:15Z | - |
dc.date.available | 2023-12-21T15:53:15Z | - |
dc.date.created | 2023-02-14 | - |
dc.date.issued | 2021-04 | - |
dc.description.abstract | The single-stage configuration of the partial nitritation (PN)-anaerobic ammonium oxidation (AMX) process is preferred due to low pH fluctuation and the low concentration of inhibitory NO2-. The novel core-shell structure integrates ammonia-oxidizing reaction in the outer layer to protect AMX bacteria in the core gel bead from oxygen inhibition and provide NO2-. Here, the initial activity of ammonia-oxidizing bacteria (AOB) in the outer layer was assessed by the specific oxygen uptake rate (OUR). AOB activity was positively correlated with biomass loading in the outer layer. A maximum OUR of 10.5 mg-DO/L.h was achieved with AOB loading of 0.23 mg-VSS per bead. During AOB enrichment, the NO2- production rate was linearly increased up to 0.65 kg-N/m(3)-d for 17 days (PVA hydrogel packing ratio=17%). The maximum oxygen penetration depth (OPD) was reduced from 966.7 +/- 52.3 mu m before enrichment to 333.3 +/- 36.4 mu m after the AOB enrichment. The liable bacteria were observed within a range of 165 mu m of the outer layer using the live and dead cell staining. Based on the OPD and liable cell distribution results, a minimal outer layer thickness of approximately 350 mu m was suggested to facilitate a successful PN-AMX process. | - |
dc.identifier.bibliographicCitation | ENVIRONMENTAL ENGINEERING RESEARCH, v.26, no.2, pp.200010 | - |
dc.identifier.doi | 10.4491/eer.2020.010 | - |
dc.identifier.issn | 1226-1025 | - |
dc.identifier.scopusid | 2-s2.0-85105326429 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/62365 | - |
dc.identifier.url | https://www.eeer.org/journal/view.php?doi=10.4491/eer.2020.010 | - |
dc.identifier.wosid | 000632433300008 | - |
dc.language | 영어 | - |
dc.publisher | KOREAN SOC ENVIRONMENTAL ENGINEERS | - |
dc.title | Critical design factors for polyvinyl alcohol hydrogel entrapping ammonia-oxidizing bacteria: biomass loading, distribution of dissolved oxygen, and bacterial liability | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Environmental Sciences | - |
dc.relation.journalResearchArea | Engineering; Environmental Sciences & Ecology | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.subject.keywordAuthor | Aerobic ammonium oxidation | - |
dc.subject.keywordAuthor | Bacterial liability | - |
dc.subject.keywordAuthor | Oxygen penetration | - |
dc.subject.keywordAuthor | Oxygen uptake rate | - |
dc.subject.keywordAuthor | PVA/alginate hydrogel | - |
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