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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.4
- 수록면
- 203 - 212 (10page)
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초록· 키워드
오류제보하기
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/m³-d for 17 days (PVA hydrogel packing ratio=17%). The maximum oxygen penetration depth (OPD) was reduced from 966.7±52.3 μm before enrichment to 333.3±36.4 μm after the AOB enrichment. The liable bacteria were observed within a range of 165 μm 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 μm was suggested to facilitate a successful PN–AMX process.
목차
ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References
참고문헌 (46)
참고문헌 신청
Do H, Lim J, Shin SG, Wu YJ, Ahn JH, Hwang S. Simultaneous effect of temperature, cyanide, and ammonia-oxidizing bacteria concentrations on ammonia oxidation. J. Ind. Microbiol. Biotechnol. 2008;35(11):1331-1338.
Qian W, Peng YZ, Li XJ, Zhang Q, Ma B. The inhibitory effects of free ammonia on ammonia-oxidizing bacteria and nitrite-oxidizing bacteria under anaerobic condition. Bioresour. Technol. 2017;243:1247-1250.
Cua LS, Stein LY. Effects of nitrite on ammonia-oxidizing activity and gene regulation in three ammonia-oxidizing bacteria. FEMS Microbiol. Lett. 2011;319(2):169-175.
Geets J, Boon N, Verstraete W. Strategies of aerobic ammonia-oxidizing bacteria for coping with nutrient and oxygen fluctuations. FEMS Microbiol. Ecol. 2006;58(1):1-13.
Kim WK, Rong C, Deokjin J. Enrichment of ammonia-oxidizing bacteria for efficient nitrification of wastewater. J. Microbiol. Biotechnol. 2005;15(4):772-779.
Qian W, Peng YZ, Li XJ, Zhang Q, Ma B. The inhibitory effects of free ammonia on ammonia-oxidizing bacteria and nitrite-oxidizing bacteria under anaerobic condition. Bioresour. Technol. 2017;243:1247-1250.
Cua LS, Stein LY. Effects of nitrite on ammonia-oxidizing activity and gene regulation in three ammonia-oxidizing bacteria. FEMS Microbiol. Lett. 2011;319(2):169-175.
Geets J, Boon N, Verstraete W. Strategies of aerobic ammonia-oxidizing bacteria for coping with nutrient and oxygen fluctuations. FEMS Microbiol. Ecol. 2006;58(1):1-13.
Kim WK, Rong C, Deokjin J. Enrichment of ammonia-oxidizing bacteria for efficient nitrification of wastewater. J. Microbiol. Biotechnol. 2005;15(4):772-779.
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