文丘里空化空蚀杀灭大肠杆菌的试验研究

发布时间：2018-01-03 12:09

本文关键词：文丘里空化空蚀杀灭大肠杆菌的试验研究　出处：《中国环境科学》2017年09期 　论文类型：期刊论文

【摘要】：利用自主研发的文丘里式水力空化反应装置,选取大肠杆菌为病原微生物的指示菌,对大肠杆菌水样进行灭菌处理.使用琼脂平板计数法检测大肠杆菌的杀灭率,同时利用生物显微镜观察大肠杆菌在空化空蚀作用前后的形态变化.分析了文丘里管喉部长径比、初始浓度、喉部流速、运行时间、水流空化数对大肠杆菌杀灭率的影响.实验结果表明:喉部长径比L/R=60时,大肠杆菌的杀灭效果最好;降低空化数、增加喉部流速、延长运行时间、选取合适的大肠杆菌初始浓度均有利于提高大肠杆菌的杀灭率.
[Abstract]:Using the Venturi hydraulic cavitation reaction device developed by ourselves, Escherichia coli was selected as the indicator of pathogenic microorganisms. The bactericidal rate of Escherichia coli was detected by Agar plate counting method. At the same time, the morphological changes of Escherichia coli before and after cavitation were observed by biomicroscopy. The aspect ratio, initial concentration, throat velocity and running time of Venturi tube were analyzed. The effect of cavitation number of water flow on the killing rate of Escherichia coli was studied. The results showed that the best killing effect of Escherichia coli was obtained when the ratio of length to diameter of larynx was L / R ~ (60). Decreasing cavitation number, increasing throat velocity, prolonging operation time and choosing appropriate initial concentration of E. coli are all helpful to increase the killing rate of E. coli.
【作者单位】：浙江工业大学建筑工程学院;
【基金】：国家自然科学基金资助项目(51479177)
【分类号】：TU991.2
【正文快照】： 饮用水是人类生活中不可或缺的资源,安全的饮用水水源为人类的健康提供了保障[1],随着经济建设的快速发展,人们对饮用水的质量要求也越来越高.传统的饮用水消毒技术存在着诸多问题,以氯消毒为主,其在消毒的同时与水体中的有机化合物反应产生消毒副产物,其中最为常见的是三卤甲

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