摘要：

在采用脉冲式SBR法处理城镇生活污水时, 通过考察硝化—投加原水—反硝化—硝化—投加乙醇—反硝化这一反复过程, 探求了DO、ORP和pH的变化规律, 发现这些控制变量与有机物的去除及脱氮(硝化与反硝化)处理过程中各指标之间有很好的相关性。通过改变进水方式和进水量, 充分利用原水中有机碳源, 减少曝气时间, 尽可能减少外碳源的投加量, 既可以降低运行成本, 又可以严格控制出水中的COD_Cr、氨氮和TN。结果表明, 当进水COD_Cr在72.18～330.8 mg/L, NH₄⁺-N在56.29～61.86 mg/L, 在原水中反硝化碳源充足的情况下, 采用脉冲式SBR法处理污水, 反硝化结束时最终出水COD_Cr<60 mg/L, NH4₄⁺N<0.92 mg/L, TN<;1.22 mg/L。

关键词: 深度脱氮, 脉冲式SBR法, 在线控制

Abstract:

The laboratory-scale pulsed SBR has been used for treating the municipal sewage. It is found that the controlling parameters (DO, ORP and pH)are well related to organic degradation and the nitrogen removal (nitrification and denitrification).By changing the methods and quantity of inflow, making full use of the organic carbon source of wastewater, reducing the aeration time, and reducing the dosage of carbon source as much as possible are necessary, so as to lower the operation costs and control the COD_Cr, NH₄⁺-N and TN strictly. The results showthat when the pulsed denitrification process with sufficient carbon is over, COD_Cr, NH₄⁺-N and TN in the water outlet was less than 60 mg/L, 0.92 mg/L and 1.22 mg/L respectively under the conditions of 72.18～330.8 mg/L for COD_Cr and 56.29～61.86 mg/L for NH₄⁺-N.

Key words: advanced nitrogen removal, pulsed sequencing batch reactor, on-line control

中图分类号: 

• X703.1