【摘要】 采用固定化包埋颗粒,借助气升式内循环好氧流化床反应器,对人工模拟低氨氮、低有机物的微污染源水进行处理。分别研究了DO和碳氮比对氨氮和有机物去除率的影响。研究表明,在T=24℃,HRT=60min,pH=7.1～7.3的条件下,当C∶N=1∶1、DO为3～8mg/L时,系统对氨氮的去除率>90%,对COD的去除率保持在50%～60%;当DO=8mg/L、C∶N=2∶1时,对氨氮的去除率最高达93.56%,对COD的去除率为50%～60%;当C∶N=3∶1时,对氨氮的去除率>90%,对COD的去除率在40%左右。在微污染源水的处理过程中,固定化包埋硝化菌有较强的适应能力和较高的处理效率。更多还原

【Abstract】 The artificial micropolluted source water with low ammonia nitrogen and organics was treated by immobilized pellets in air-lift inner loop aerobic fluidized bed reactor.The influence of DO and C/N ratio on the removal efficiencies of ammonia nitrogen and organics was studied respectively.The study shows that under the conditions of T=24 ℃,HRT=60 min and pH=7.1 to 7.3,the removal rate of ammonia nitrogen is above 90%,and the removal rate of COD keeps at 50% to 60% at C/N ratio of 1 ∶1 and DO of 3 to 8 mg/L;the removal rate of ammonia nitrogen is up to 93.56%,and the removal rate of COD is 50% to 60% at C/N ratio of 2 ∶1 and DO of 8 mg/L;the removal rate of ammonia nitrogen remains above 90%,and the removal rate of COD is about 40% at C/N ratio of 3 ∶1.The results show that the immobilized nitrobacteria have stronger adaptability and higher treatment efficiency during treatment of micropolluted source water.更多还原