预氯化与强化混凝相结合用于给水处理的试验

Drinking Water Treatment using Pre-chlorination and Enhanced Coagulation Process

试验研究了氯化时间、有效氯投加量等因素对次氯酸钠氯化效果的影响,以及氯化与混凝的先后顺序对CODMn及UV254去除效果的影响。结果表明,对本试验原水,有效氯投加量为4mg/L,经过30min氯化后,CODMn去除率达20%左右,再经过强化混凝后,CODMn去除率可达50%左右。先氯化后混凝对于CODMn的去除效果总体要优于先混凝后氯化。在低投氯量时,先混凝后氯化对于UV254的去除效果优于先氯化后混凝,但随着投氯量的增加二者的处理效果相当。

The effects of chlorination time, dosage of available chlorine and some other factors on the results of the sodium hypochlorite pre-chlorination were studied respectively through the test. The removal effects of CODMn, and UV254 were also studied by changing the order of chlorination and coagulation. The results of the test showed that,for the raw water of the test, 4 mg/L of available chlorine was added, the removal efficiency of CODMn reached about 20 % after 30 min of oxidation, and then through the enhanced coagulation, the removal efficiency of CODMn reached about 50 %. Chlorination first was superior to coagulation first for the effect of the CODMn, removal. The case was on the contrary to UV254 removal, but with the increase of the available chlorine added the removal effects were almost the same.