冬季赣江原水混凝剂优选试验

A Research on Coagulant Optimization of Raw Water of Gan River in Winter

试验以三氯化铁、硫酸铝、聚合氯化铝(PAC)、聚合氯化铝铁(PAFC)作为混凝剂进行六联杯罐试验,通过比较各混凝剂对原水浊度及有机物的去除效果,经技术分析后得出:对于污染较严重的冬季赣江原水,在低投药量的情况下,铝盐的除总有机碳(JOC)的能力化铁盐强,而在高投药量下正好相反;对于COD_(Mn)来说,高聚物的去除率要高于低分子混凝剂,且聚合铝铁的效果优于聚合氯化铝;混凝对氨氮的去除效果不是很明显;对于污染不是很严重的赣江原水,氯化铁的除浊效果最好,高分子聚合物对有机物的去除效果较好,各种有机物指标的去除趋势相近,规律性较强。

Using FeCl3, Al2 （SO4）3, PAC, PAFC as coagulants, testing the removal efficiencies of turbidity and organic matter for every coagulant after six-jar test, we draw the following conclusion. For more polluting raw water of Gan River in winter, the ability of aluminum for removing TOC is higher than ferric chloride in the condition of low dosage, while the effect in the case of high dosage is opposite. For CODMn, the removal rate of polymer is higher than the low-molecu- lar-weight coagulant, and the effect of PAFC is higher than PAC; the coagulation effect on the ammonia removal is not very obvious. For less polluting raw water of Gan River, the removal efficiencies of turbidity for FeCl3 is the best, the removal efficiencies of organic matter for Polymer is better, and the removal trend of every indicators of organic matters are similar and strong regularly.