分别采用恒定鼓风量[0.4 m3空气/(m3水·h)]和恒定DO(0.5 mg/L)的连续曝气控制方式,通过控制温度为30±1℃、pH值为7.9～ 8.2,研究两种曝气控制方式对于低C/N城市污水短程硝化的特性.结果表明:恒定曝气量[0.4 m3空气/(m3水·h)]实现稳定短程硝化的时间明显快于恒定DO(0.5 mg/L)的曝气控制方式,而且恒定曝气量实现稳定的亚硝酸盐积累率达95％以上,明显地高于恒定DO(0.5 mg/L)的曝气控制方式的NO2-N积累率85％,恒定曝气量[0.4 m3空气/(m3水·h)]的控制方式短程硝化的曝气控制时间宜控制为4h,而恒定DO(0.5 mg/L)的控制方式短程硝化的曝气控制时间宜控制为3h.%In this experiment,under the conditions of temperature of 30+ 1 ℃ and pH value of 7.9 to 8.2,the shortcut nitrification characteristics of low C/N urban wastewater are researched by the control modes of constant blast volume [0.4m3空气/(m水 · h)]and constant DO (0.5 mg/L) of continuous aeration.The results showed that the time required for the constant aeration mode [0.4 m3空气/(m3水 · h)] was significantly less than that of the constant DO(0.5 mg/L) aeration control mode to achieve stable short cut nitrification.And NO2-N accumulation efficiency of constant aeration reached to 95％,which was higher than the rate of 85％ for constant DO (0.5 mg/L) aeration control.In addition,the time of shortcut nitrification aeration with constant aeration [0.4 m3空气/(m3水 · h)]should be controlled to 4 h,while the mode of constant DO (0.5 mg/L) should be at 3 h.
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