高氨氮浓度下的亚硝化过程及其影响因素研究

Study on short-cut nitrification process and its affecting factors under high a mmonia concentration condition

利用小试 CSTR反应器对高氨氮浓度条件下的亚硝化过程进行了试验研究 ,结果表明 :35℃时 ,在无污泥回流的情况下 ,运行 2 6 d后即实现了亚硝化 ,从第 73d开始出水中检测不出 NO3- ;在增加了连续污泥回流的情况下 ,反应器的运行更稳定 ,且出水中仍检测不到 NO3- ;反应器内的污泥具有很高的氨氧化活性 ,其最大氨氧化速率可达 3.0 1 kg N H+ 4- N / ( kg VSS· d) ;并利用间歇试验对 p H和

A study was conducted on the short-cut nitrification process under hig h ammonia concentration condition in a lab-scale continuous stirring tank react or. The results showed that, at temperature of 35℃, short-cut nitrification wa s achieved after 26 days operation without sludge recycle. After 73 days, no NO 3 - in the effluent could be detected. While continuous sludge recycling wa s started, the performance of the reactor became more stable, and still no NO 3 - could be detected in the effluent. The ammonia oxidation activity of th e sludge was relatively high, and its maximum rate was 3.01 kgNH + 4-N/(kgVS S·d). The affecting of pH and DO to the ammonia oxidation rate was also studied .