원추형 유동층반응기에서 박테리아 Pseudomonas denitrificans(ATCC 13867)을 25/35mesh와 활성탄에 부착시켜 생물학적 탈질소시키는 반응에 대하여 연구하였다. 탈질화 반응에서 최적 pH 및 온도는 7-8.5 및 25-35℃였으므로 nitrate의 환원속도는 nitrate의 농도와 무관한 0 차 반응이었다. 반응기 설계를 위한 수학적 모델은 S0^(0.55)_0=-Kt￣+ S^(0.55)_i 였으며, 여기에서 K=1.657(1-ε_a) (ρk)^(0.55)D^(0.45)r^(-0.9)_p 였다. 본 실험에는 K는 0.024의 값을 가졌다.

A tapered fluidized bed reactor was employed for biological denitrication, in which a facultative and heterotrophic denitrifier Ps. denitrificans(ATCC 13867) adhering on 25/35 mesh activated carbon was used. It has been found that optimum pH was in 7-8.5, and optimum temperature in 25-35℃. The rate of nitrate reduction was almost constant irrespective of nitrate concentration and zero order. A mathematical model was developed for the design of reactor S^(0.55)_0=-Kt￣+ S^(0.55)_i where K=1.657(1-ε_a)(ρk)^(0.55)D^(0.45)r^(-0.9)_p In the experiments, K value was 0.024.