微酸性次氯酸电解水、臭氧和二氧化氯对桶装水中污染物铜绿假单胞菌的消毒效果及副产物的研究

Study on the Disinfection Effect and By-Products of Slightly Acidic Hypochlorous Acid Electrolyzed Water, Ozone and Chlorine Dioxide on Pseudomonas Aeruginosa, the Pollutant in Barreled Water

目的:评价微酸性次氯酸电解水、臭氧及二氧化氯对桶装水污染物铜绿假单胞菌的消毒效果及副产物产生情况。方法:本项目采用试验模拟的方法,测定消毒效果并对消毒副产物三氯甲烷、四氯化碳残留量进行监测。结果:浓度为50 ppm的次氯酸电解水在被稀释2 200倍以下均有杀菌作用且无副产物残留;二氧化氯有效氯含量在0.16 mg·L^(-1)以上均有杀菌效果且副产物不超标;臭氧浓度低于0.15 mg·L^(-1)时,消毒效果不明显。高于0.65 mg·L^(-1),有出现溴酸盐超标现象。结论:对桶装水的消毒要确保次氯酸电解水稀释倍数要低于2 200倍;二氧化氯中有效氯含量要控制在0.16 mg·L^(-1)以上;臭氧的杀菌浓度要控制在0.15~0.65 mg·L^(-1)。

Objective: To evaluate the disinfection effect of slightly acidic hypochlorous acid electrolyzed water, ozone and chlorine dioxide on Pseudomonas aeruginosa, the pollutant of barreled water, and the production of by-products. Method: This project adopts the method of test simulation to measure the disinfection effect and monitor the residual amount of disinfection by-products chloroform and carbon tetrachloride. Results: Hypochlorous acid electrolyzed water with a concentration of 50 ppm has a sterilization effect and no by-products after being diluted by 2 200 times;the effective chlorine content of chlorine dioxide above 0.16 mg·L^(-1) has a sterilization effect and no by-products. Exceeding the standard;when the ozone concentration is lower than 0.15 mg·L^(-1), the disinfection effect is not obvious. Above 0.65 mg·L^(-1), bromate may exceed the standard. Conclusion: The disinfection of bottled water must ensure that the dilution factor of hypochlorous acid electrolyzed water is less than 2 200 times;the effective chlorine content in chlorine dioxide must be controlled above 0.16 mg·L^(-1);the sterilization concentration of ozone must be controlled at 0.15~ 0.65 mg·L^(-1).