变扩散角文丘里式水力空化杀灭原水中病原微生物试验研究  

Experimental study of pathogenic microorganisms in raw water disinfected by hydrodynamic cavitation in variable diffusion angle Venturi tubes

作　　者：王磊[1] 董志勇[1] 秦兆雨 耿坤 张凯[1] 居文杰[1] 赵文倩 李杨如 李大庆 

机构地区：[1]浙江工业大学建筑工程学院,杭州310014

出　　处：《水力发电学报》2017年第9期75-81,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51479177)

摘　　要：本文采用自主研发的变扩散角文丘里式水力空化发生装置,对杭州上塘河原水不同配比浓度水样进行灭菌处理,菌落总数和大肠杆菌作为指示微生物。水力空化对原水中病原微生物的杀灭效果可以通过检测分析菌落总数和大肠杆菌的杀灭率来表征。试验研究了文丘里式水力空化装置的扩散角、原水配比浓度、喉部流速、空化数以及水力空化作用时间对菌落总数和大肠杆菌杀灭率的影响。试验研究结果表明:选取合适的文丘里扩散角和原水配比浓度,提高喉部流速或降低空化数,延长水力空化作用时间等有益于原水中病原微生物的杀灭。水力空化作用能够杀灭原水中的病原微生物,是一种安全、高效、无消毒副产物的饮用水消毒新技术。In this work, a self-developed varied diffusion angle Venturi-type hydrodynamic cavitation generator was used to sterilize the raw water sample, taken from the Shangtang River of Hangzhou and blended with pathogenic microorganisms of different contents. Its killing effect was characterized by detecting the killing rates of total colony count and Escherichia coli, both as indicative microbes, and the study focused on the effects of Venturi diffusion angle and throat velocity, raw water percentage, cavitation number, and cavitation time on the killing rates. Results show that the killing effect can be improved by using appropriate raw water percentage and diffusion angle, increasing Venturi throat velocity, lowering cavitation number, or improving cavitation time. And hydrodynamic cavitation is an effective way to kill pathogenic microorganisms in raw water, thereby providing a safe, efficient and novel technology for drinking water disinfection without adverse by-products.

关 键 词：水力空化 变扩散角 文丘里式 病原微生物 饮用水消毒 

分 类 号：TV131[水利工程—水力学及河流动力学]