城市污水化学辅助除磷

Chemical-aid phosphorus removal of the municipal wastewater

采用化学絮凝的方法,对硫酸亚铁在城市污水回用中的最佳条件进行了研究,结果表明,当pH值调到9.3时,分析纯的硫酸亚铁投加量为60 mg/L,投加足量PAM时,可将总磷降至0.28 mg/L,去除率达94%,pH为8.3,COD为20.2 mg/L,浊度为0.8 NTU,达到污水排放一级A标准。

Based on the method of chemical flocculation, the optimum conditions of the ferrous sulfate in the recycling of the municipal wastewater are studied, the results show that, the dosing quantity of the pure ferrous sulfate analyzed is 60 mg/L when the pH value decrease to 9.3, and when the full quantity PAM is added, it can decrease the total quantity of the phosphorus to 0.28 mg/L, the removal rate to 94%, pH to 8.3, COD to 20.2 mg/L and the turbidity to 0.8 NTU, which reaches the first order A standard of the wastewater discharge.