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实验研究亚铁盐对来自于供水水库的含藻原水二氧化氯杀藻过程中产生的无机副产物亚氯酸盐去除的效果及亚铁盐的投加量,同时考察亚铁盐在去除亚氯酸盐的过程中的除浊作用。实验结果表明,FeSO4能完全去除二氧化氯杀藻的无机副产物亚氯酸盐。FeSO4在去除亚氯酸盐的同时也与二氧化氯反应而使二氧化氯的浓度降低。FeSO4的用量是亚氯酸盐和二氧化氯与FeSO4反应的理论用量的总和。在二氧化氯预氧化杀藻与投加FeSO4的时间间隔较短的情况下,FeSO4的投加量按照初始投加量70%的二氧化氯与FeSO4反应的化学计量关系计算确定,此时亚氯酸盐能完全被去除。FeSO4在去除亚氯酸盐的同时具有除浊作用,在饮用水的净化中可以减少常规混凝剂的用量,当浊度为23.3 NTU或24.3 NTU时,不需再投加常规混凝剂。FeSO4的絮凝作用对除藻有协同作用。
The effect of ferrous salts on the removal of inorganic by-products of chlorite produced during the algae-depleted water from algae-containing water from algae-containing water reservoirs and the dosage of ferrous salts were investigated experimentally. Meanwhile, Chlorate in the process of turbidity effect. The experimental results show that FeSO4 can completely remove the inorganic by-product chlorite by chlorine dioxide. FeSO4 reacts with chlorine dioxide while chlorite is being removed to reduce the concentration of chlorine dioxide. The amount of FeSO4 used is the sum of the theoretical amounts of chlorite and chlorine dioxide reacted with FeSO4. In the chlorine dioxide pre-oxidation of algae and the FeSO4 dosage is short, the dosage of FeSO4 in accordance with the initial dosage of 70% of the chlorine dioxide and FeSO4 reaction stoichiometry to determine the relationship, this time in Asia Chlorate can be completely removed. FeSO4 has the function of removing turbidity while removing chlorite, and the amount of conventional coagulant can be reduced in the purification of drinking water. When the turbidity is 23.3 NTU or 24.3 NTU, no need to add conventional coagulant. The flocculation of FeSO4 has a synergistic effect on algae removal.