摘要：

采用两段BAF处理城市污水,探讨了气水比对反应器处理效果的影响。在A段水力负荷为0.81 m/h、气水比为3:1时,分析了B段气水比分别为3:1、2:1和1:1时反应器的运行情况。结果表明:A段反应器对TN基本上没有去除效果,因NH₄⁺-N的部分氧化使得出水中NO₂^--N质量浓度介于0.45~0.70 mg/L之间,NO₃^--N质量浓度则介于6.09～41.04 mg/L;B段反应器气水比为2:1时,TN的去除效果最好,平均去除率为50.02%,出水中硝酸盐含量达到最小值。

关键词: 气水比, 同步硝化反硝化, 曝气生物滤池

Abstract:

The two-stage BAF process for treating municipal sewage，and the influence of air/water ratio on the treatment effectiveness of the reactors have been investigated. When the hydraulic loading for stage A is 0.81 m/h and air/water ratio 3∶1，the operational state of the reactor is analyzed when the air/water ratio for stage B is 3∶1，2∶1 and 1∶1，respectively. The results show that the reactor in stage A basically has no removal effect on TN，because the partialoxidation of NH₄⁺-N makes the mass concentration of NO₂^--N in the effluent range from 0.45 to 0.70 mg/L and that of NO₃^--N range from 26.09 mg/L to 41.04 mg/L. When the air/water ratio for stage B is 2∶1，the removal efficiency of TN is the best. The verage removal rate is 50.02%. The content of nitrate achieves the minimum.

Key words: air/water ratio, simultaneous nitrification and denitrification （SND）, biological aerated filter （BAF）

中图分类号: 

• X703.1