혐기조와 무산소조의 유입수 분할주입에 의한 영양염류 제거

This study was carried out to investigate the influence of nitrogen and phosphorus removal with a separate feeding of influent carbon source and also changes of internal recycle to Anoxic tank from final Clarifier in a Parallel Anaerobic-Anoxic tank. The study was operated with 4 phases according to the changes of influent carbon source and internal recycle. The results were concluded as follows, In all phase, Organic and NH^(+)₄-N removal efficiencies were more than 90%. Phase Ⅳ operated with influent COD concentration 290mg/L and internal recycle 30 obtained best results that the concentrations of Effluent SP and NO^(-)₃-N were 0.98mg/L and 2.62mg/L, respectively and as internal recycle increases, denitrification amounts in anoxic tank of phase Ⅳ has more than doubled in denitrification amounts in anoxic tank of phase Ⅰ.