| Abstract |
| Abstract : The study was conducted based on the A2/O process consisting of anaerobic / anoxic / oxic reaction tank. The removal rate of nitrogen was compared with that of the existing process by placing a zeolite - filled biological aerated filter (BAF) at the end of the process. A2/O was designed in three types. Type B increased the size of the oxic tank, and Type C placed the additional BAF. Zeolite has excellent adsorption ability of NH4+-N, and this study has taken the advantage of that NH4 +-N can be easily used by nitrifying microorganism. As a result, total nitrogen and NH4+-N removal efficiency of A2/O-BAF were about 15% higher than other types. Also, A2/O-BAF showed superior treatment efficiency compared to other types even when the loading of NH4+-N increased in the temperature range of 4.4 - 13.6℃. And the relationship between MLSS and operation efficiency was investigated in this study, but additional research is needed on this subject. |
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| Key Words |
| A2/O, BAF, Nitrification, Total Nitrogen Removal, Zeolite |
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