铝铁/高锰酸钾复配药剂深度处理城镇污水研究

Research on Aluminum and Iron/Potassium Permanganate Compound Coagulant for Advanced Treatment of Municipal Sewage

针对城镇污水回用技术的处理要求和特点，研究了自制铝铁／高锰酸钾复配药剂对城镇污水深度处理的效果和机理，提出了最佳工艺组合．结果表明：当药剂投加量为90mg·L^-1，絮凝时间为15min，絮凝搅拌强度为120r．min^-1，沉淀时间为30min时，浊度去除率为95％，化学需氧量（COD）去除率达到75％，总磷去除率达到98％．此外，为使出水满足城市污水回用标准，研究了复配药剂的投加量与不同水质COD去除率的关系，并得出二者之间的线性关系，药剂费用约为0．03～0．07元·m^-3．

To address the processing dermnds and characteristics of municpal sewage, the effect and mechanism of self-rmde aluminum and iron/potassium permanganate compound coagulant for advanced treatment of munidpal sewage was researched, and the best combination was put forward. The results indicate that the removal rate of turbidity is 95%, the removal rate of CODcr is 75% and the removal rate of TP is 98% when 90 mg·L^-1 of coagulant dosage, 15 rain of flocculating time, 120 r·min^-1 of mixing force and 30 rain of settling time. In addition, to make the effluent quality meet the reuse standard, relation between dosage of coagulant and COD removal rate of different influent was researched, and the linear relationship between them is obtained, the cost of coagulant is about 0.03-0.07 RMByuan·m^-3.