针对糖精钠生产废水有机物浓度高、盐含量大、可生化性差的特性,设计了分段废水处理工艺,选取酯化分离和置换工序所产生邻氨基苯甲酸废水,并依据Cu2+与H2O2发生类Fenton反应原理,利用Cu2+、Fe2+离子的协同效应,结合铜离子沉淀法和芬顿氧化法,探讨了硫酸铜、硫酸亚铁、过氧化氢加入量等因素对废水中COD去除率的影响;采用单因素实验方法确定了最佳参数:50 mL糖精钠废水,加入1.15 g硫酸铜、0.1 g硫酸亚铁、21 mL 30％过氧化氢,COD去除率达到76％.该工艺与芬顿氧化法相比,硫酸铜的加入强化了Fe2+离子的催化作用,提高了废水中COD去除率.%Aiming at the characteristics of high concentration of organic substance,large salt content and poor biodegradability in the production of saccharin sodium wastewater,the segmented wastewater treatment process was designed. Anthranilic acid wastewater generated by the esterification separation and replacement process was selected. According to the characteristics of Cu2+and H2O2 Fenton reaction principle,the use of Cu2+,Fe2+synergistic effect, combined with copper ion precipitation and Fenton oxidation,we discussed copper sulfate,ferrous sulfate,hydrogen peroxide and other factors on the COD removal efficiency of wastewater. We used the single factor test method to determine the optimum parameters which were as follows:50 mL sodium saccharin wastewater,1.15 g copper sulfate, 0.1 g ferrous sulfate and 21 mL 30％hydrogen peroxide. The removal rate of COD was reached 76％. Compared with the Fenton oxidation method,the addition of copper sulfate strengthened the catalytic role of Fe2+ions,we improved the COD removal rate of wastewater.
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