高锰酸盐复合药剂强化混凝处理高有机物含量的地表水

Enhanced coagulation of polluted surface water with high organic contents by permanganate composite chemicals

用高锰酸盐复合药剂强化混凝处理 ,对受高浓度有机物废水污染的地表水进行了试验研究。结果表明 ,仅用硫酸亚铁氯化法混凝处理时 ,原水CODMn浓度增加使混凝效果变差 ,混凝曲线的最佳投药量范围变窄 ,处理后水质难以达到要求。高锰酸盐复合药剂有显著强化混凝效能 ,其强化混凝效果与投加方式有关 ,高锰酸盐复合药剂在硫酸亚铁混凝剂之后投加的混凝效果最好。投加高锰酸盐复合药剂强化处理使混凝曲线向下移动且向两极张开 ,拓宽了最佳混凝剂投量范围 ,提高了系统的抗干扰性或抗冲击性 ;高锰酸盐复合药剂最佳投量与原水CODMn之间符合双矩形双曲线方程 y=4.85 4x/ (2 5 .5 2 7+x)

The effectiveness of enhanced coagulation of polluted surface water with high organic contents by permanganate composite chemicals has been studied through laboratory jar test. It shows that permanganate composite chemicals oxidation greatly enhances the coagulation of the water,resulting in obvious reduction of residual turbidity of settled water. The oxidation of permanganate composite chemicals widens the optimal dosage range of coagulant and improved the stability of treated water quality. The relationship between the optimal dosage of permanganate composite chemicals and the COD Mn of raw water is a double rectangular hyperbola y =4.854 x /(25.527+ x ).