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DOI : ,    Vol.7, No.2, 39 ~ 49, 1999
Title
Nitrogen Removal by the Indirect Aerated Fluidized Bed
안송엽Song Yeob Ahn
Abstract
This is a study on the removal of nitrogen in wastewater by the biological fluidized bed. The results obtained through varying the recycle ratio, the hydraulic retention time and the recirculation ratio between reactors showed that the organic removal efficiency and the nitrogen removal efficiency were above 93%, 88% respectively, and the denitrification efficiency was above 85% when C/N ratio and H/A ratio were above 5 and 3.16, respectively. The biological fluidized bed obtained 93% BOD removal in 48min, 87% NH₄-N removal in 32min, and 84% NO₃-N removal in each reactor. In anoxic reactor, the recycle ratio, the total hydraulic retention time and the recirculation ratio were 30, 32min, 3 at 34℃. In aerobic reactor, 40, 48min, 3 at 28℃.
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