化学生物絮凝强化一级处理工艺的影响因素研究

以低浓度城市污水为处理对象,探讨了影响化学生物絮凝强化一级处理工艺除污效能的因素。以对TP、SS、COD和NH3-N的去除效果为评价指标,考察了絮凝剂PAFC投加量、污泥回流比和助凝剂PAM投加与否对工艺除污效能的影响。结果表明,PAFC的投量(以Al2O3计)为10.6 mg/L时,工艺的除污效果最好;控制污泥回流比为33.3%时,能获得有效的化学生物絮凝作用,而投加PAM对工艺的除污效能无显著改善作用。

Affecting Factors of Enhanced Primary Treatment Process with Chemical and Biological Flocculation

The factors influencing the efficiency of enhanced primary treatment process with chemical and biological flocculation for treatment of low-concentration municipal wastewater were studied. The effects of PAFC dosage, sludge return ratio, addition and no addition of PAM on the removal efficiencies of TP, SS, COD and NH_3-N were investigated. The results show that the optimal effect can be achieved at PAFC dosage of 10.6 mg/L (calculated as Al_2O_3). Controlling the sludge return ratio at 33.3% can obtain effective chemical and biological flocculation. The addition of PAM has no evident effect on improving the removal efficiency of pollutants.