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为了解决高溴黄河水臭氧化过程中溴酸盐(BrO-3)生成问题,在连续实验装置中,采用H2O2/O3高级氧化技术(AOPs)技术,研究臭氧(O3)、过氧化氢(H2O2)质量浓度以及水力停留时间(HRT)对黄河水BrO3-生成控制的影响。研究结果表明:H2O2的投加能够有效促进O3消耗;当O3质量浓度为2.9～4.3mg/L时,单独臭氧化过程中,BrO-3生成量为13～50μg/L,均超标,投加H2O2能够有效抑制BrO3-的产生,其抑制效果与H2O2/O3的摩尔比有关,当H2O2/O3摩尔比为1.5时,控制效果最佳,当O3质量浓度低于3.72mg/L时,在此比例时可将BrO-3浓度控制在10μg/L以下,达到现行的饮用水标准;BrO3-生成量与HRT成正比;当O3质量浓度较高时,可通过适当减少HRT控制出水BrO-3浓度。H2O2/O3高级氧化工艺对有机物的去除具有强化作用,出水UV254去除率可达50%以上。
In order to solve the problem of the generation of bromate (BrO-3) in the process of ozonation of high bromine yellow water, the oxidation of ozone (O3) and hydrogen peroxide (H2O2) were studied in a continuous experiment using H2O2 / O3 advanced oxidation technology ) Mass concentration and hydraulic retention time (HRT) on the formation of BrO3- in the Yellow River water. The results showed that the addition of H2O2 could effectively promote the consumption of O3. When the mass concentration of O3 was 2.9 ~ 4.3mg / L, the amount of BrO-3 produced was 13 ~ 50μg / L during ozonation alone, H2O2 can effectively inhibit the production of BrO3-, and its inhibitory effect is related to the molar ratio of H2O2 / O3. When the molar ratio of H2O2 / O3 is 1.5, the control effect is the best. When the mass concentration of O3 is less than 3.72mg / L, The concentration of BrO-3 can be controlled below 10μg / L to reach the current standard of drinking water; the amount of BrO3- generated is proportional to HRT; when the concentration of O3 is high, the concentration of BrO-3 can be controlled by appropriate reduction of HRT . H2O2 / O3 advanced oxidation process on the removal of organic matter has a strengthening effect, UV254 effluent removal rate of up to 50%.