混凝剂在再生水深度处理中的实验研究

Experimental Study of Coagulant in Advanced Treatment of Reclaimed Water

选用硫酸亚铁、三氯化铁、聚合氯化铝、硫酸铝4种混凝剂进行再生水深度处理实验,考察铁盐类和铝盐类混凝剂对二级出水中浊度和UV254的去除效果,以及对三氯甲烷与四氯化碳的控制效果。在投加量为40 mg/L时,聚合氯化铝对浊度和UV254处理效果最好;对氯化消毒中三氯甲烷生成量控制效果最好的是三氯化铁,其次是硫酸亚铁;聚合氯化铝对四氯化碳的控制效果最好,且投加量在10 mg/L时,四氯化碳生成量达到最低。

Four coagulants were selected in the reclaimed water advanced treatment test,including ferrous sulfate,ferric chloride,polyaluminum chloride,and aluminum sulfate.The purpose of this experiment was to examine the turbidity and UV254 removal effect of iron salt and aluminum salt coagulants,and the control effect of coagulants on chloroform and carbon tetrachloride.Polyaluminum chloride has the best effect on turbidity and UV254 treatment at a dosage of 40 mg/L.The best control effect on the production of chloroform in chlorination disinfection is ferric chloride,followed by ferrous sulfate.Polyaluminum chloride has the best control effect on carbon tetrachloride,and when the dosage is 10 mg/L,the production of carbon tetrachloride reaches the lowest.