强化混凝处理低温低浊水的研究

针对汉江水源冬季的低温低浊水给水厂处理带来的困难,研究了聚合二甲基二烯丙基氯化铵(简称HCA)、活化硅酸、聚丙烯酰胺三种不同助凝剂处理低温低浊水的效果,结果表明先加助碱剂以调节pH值,再用HCA和聚合氯化铝(PAC)配伍使用,大大改善了混凝效果且与其它助凝剂相比,该药剂配制、投加方便,不会增加水厂土建费用,可广泛应用于水厂低温低浊水的处理。

A Study of Treatment of Low-Turbidity,Low-Temperature Water by Enhanced Coagulation

In view of the difficulties caused by the low-temperature, low-turbidity water source in Han River in winter to the water treatment in water plants, the results of treatment of low-temperature, low-turbidity water with three different coagulant aids, i.e., polymerized dially dimethyl ammonium chloride(HCA), active silicic acid and Polyacrylamide(PAM)were studied. The results showed that when basicity improver was added in first to adjust the pH value and then HCA and polymerized aluminum chloride(PAC)were used in combination, the results of coagulation were greatly improved, and that, compared to other coagulant aids, the said agents are easy to dose and do not cause additional cost for civil works to the water plants and, therefore, can be widely used in water plants for the treatment of low-temperature, low-turbidity water.