| Abstract |
| Anaerobic ammonium oxidation (anammox) coupled to nitrite or nitrate reduction is very slow reaction with about 20days of doubling time. For cultivation of the very slow growing bacteria, a sequencing batch reactor (SBR) is considered the most credible reactor and the utilization of media for providing a high biomass concentration using a vast surface area. This study compared the N removal efficiencies of SBR with fluidized media to those without media. The optimum operating time in SBR with and without media, when the removal efficiency of TN did not increase anymore, appeared at 21 h and 24h, respectively. The TN removal efficiency was 61% and 35% in SBR with and without packed media at 24 h. It is because NO_{3}^{-} and NH₃ in SBR with media were more removed and NO_{3}^{-} was less produced than those without media by anammox and denitrification bacteria. |
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| Key Words |
| Anammox, Denitrification, Nitrate Reduction, Adaptation, Electron acceptor |
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