利用缺氧反硝化降解硝基苯的试验

首先在(35±0.1)℃水温条件下,采用静态试验装置测定硝基苯缺氧反硝化的pH值以及理论COD质量浓度与NOx--N(包括NO3--N和NO2--N)质量浓度的比值w,然后参考这些参数,利用动态试验装置(水温为35℃左右)研究NO2--N质量浓度对硝基苯降解的影响和反硝化处理硝基苯废水的实际运行效果。结果表明:6.0~8.0范围内的pH值和NO2--N质量浓度对硝基苯缺氧反硝化去除效果都没有显著影响;在硝基苯质量浓度不超过60 mg/L、w约为0.23的情况下,废水中的硝基苯能得到有效降解。

Study on degradation of nitrobenzene under anoxic denitrification condition

The stationary testing apparatus was used to measure the pH value and the theoretical mass concentration ratio C/N of COD and NOx -N （including NO3^--N and NO2^--N） at a temperature of 35±0.1℃. Using the parameters from stationary tesdng, the dynamic testing apparatus was nan at a temperature around 35±. The influence of the mass concentration of NO2^- -N on the biodegrading properties of the nitrobenzene and the practical operation effectiveness of denitrifying the nitrobenzene wastewater were studied. The results showed that the effective removal of anoxic denitrifieation was not significantly affected by the pH value and the mass concentration of NO2^--N. Nitrobenzene in the wastewater could biedegrade effectively when the nitrobenzene concentration was not more than 60mg/L and the C/N ratio was about 0.23.