지원사업
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.
초록· 키워드
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The purpose of this study was to investigate the nitrification characteristics of biological aerated filter (BAF) packed with ceramic media, especially focusing on nitrite build-up during nitrification. When increasing the nitrogen load above $1.63kgNH_4{^+}-N/m^3{\cdot}d$, ammonium removal efficiency decreased to less than 60% and the nitrite ratio ($NO_2{^-}-N/NO_x-N$) of higher than 75% was achieved due to the inhibitory free ammonia (FA, $NH_3-N$) concentration and oxygen limitation. FA inhibition, however, is not recommended strategy to promote nitrite build-up since FA concentration in the reactor is coupled with decreased ammonium removal efficiency. Nitrite ratio in the effluent was also affected by aeration rate and influent ammonium concentration. Ammonium oxidation was enhanced at a higher aeration rate regardless of influent ammonium concentration but, the nitrite ratio was dependent on both aeration rate and influent ammonium concentration. While a higher nitrite ratio was obtained when BAFs were fed with $50mgNH_4{^+}-N/L$ of influent, the nitrite ratio significantly decreased for a greater influent concentration of $200-300mgNH_4{^+}-N/L$. Taken together, aeration rate, influent ammonium concentration and FA concentrations kept in the BAF were found to be critical variables for nitrite accumulation in the BAF system.
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참고문헌 (25)
참고문헌 신청
American Public Health Association / 1992 / Standard Methods for the Examination of Water and Wastewater / American Public Health Association :4~75
Anthonisen, A. C. / 1976 / Inhibition of Nitrification by Ammonia and Nitric Acid / Journal of the Water Pollution Control Federation 48:835~852
Garrido, J. M. / 1997 / Influence of Dissolved Oxygen Concentration on Nitrite Accumulation in a Biofilm Airlift Suspension Reactor / Biotechnology and Bioengineering 53:168~178
Hasan, H. A. / 2011 / Response Surface Methodology for Optimization of Simultaneous COD, NH4+-N, and Mn2+ Removal from Drinking Water by Biological Aerated Filter / Desalination 275:50~61
Hellinga, C. A. / 1998 / The Sharon Process : An Innovative Method for Nitrogen Removal from Ammonium-rich Wastewater / Water Science and Technology 37:135~142
Anthonisen, A. C. / 1976 / Inhibition of Nitrification by Ammonia and Nitric Acid / Journal of the Water Pollution Control Federation 48:835~852
Garrido, J. M. / 1997 / Influence of Dissolved Oxygen Concentration on Nitrite Accumulation in a Biofilm Airlift Suspension Reactor / Biotechnology and Bioengineering 53:168~178
Hasan, H. A. / 2011 / Response Surface Methodology for Optimization of Simultaneous COD, NH4+-N, and Mn2+ Removal from Drinking Water by Biological Aerated Filter / Desalination 275:50~61
Hellinga, C. A. / 1998 / The Sharon Process : An Innovative Method for Nitrogen Removal from Ammonium-rich Wastewater / Water Science and Technology 37:135~142
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