【摘要】 利用气提式反应器研究硝化过程中的亚硝酸积累现象,并在运行6个月后将其与一升流式污泥床反应器相连接,研究硝化反硝化联合工艺的处理效果。结果表明,在硝化部分,当进水氨氮浓度>98mg/L,游离氨(FA)为1.07mg/L时,亚硝态氮浓度开始逐渐上升,亚硝化率(NO2--N/NOX--N)>50%。实验条件下氨氮污泥负荷为0.53kg/(kg·d)时,氨氮去除率较高且亚硝化率最大,但当污泥负荷达到0.85kg/(kg·d)时,氨氮去除率降低。升流式污泥床反应器中形成明显的颗粒污泥,在碳源充足的条件下(即C/N>3),最终出水效果显著提高。更多还原

【Abstract】 Some studies on nitrite accumulation in nitrification process by using air lift reactor were performed. Treatment effect of combined process of nitrification-denitrification was also studied by combining air lift reactor with upflow sludge bed after it had been operating for six months. The results show that when concentration of influent ammonia was more than 98 mg/L and free ammonia reached 1.07 mg/L ,concentration of effluent nitrite started to rise and over 50% of nitritation rate(NO-2-N/NO-X-N)could be achieved. When ammonia sludge loading was close to 0.53 kg/(kg·d) ,ammonia removal rate was quite high and nitritation rate was maximum. But when sludge loading reached 0.85 kg /(kg·d) ,ammonia removal rate fell. There was obvious particulate sludge in upflow sludge bed reactor. Treatment effect of ultimate effluent turned good obviously when carbon source was enough.更多还原