摘要
基于浙江工业大学水力学实验室自主研发的方孔多孔板与文丘里组合式水力空化反应装置,通过变换多孔板与文丘里喉部、文丘里扩散角的不同组合,针对取自非饮用水源的原水,以水中菌落总数和大肠杆菌为指示菌,研究了空化数、喉部流速、孔口排列、原水初始体积分数和水力空化作用时间等因素对灭菌效果的影响,并探讨其产生的内在机理。实验结果表明:当组合形式为25孔交错式孔板、喉部300 mm、扩散角为4.3°时可达到对菌落总数和大肠杆菌最优灭活效果。同时,降低空化数、提高喉部流速、延长水力空化作用时间和选取适当的原水初始体积分数都将有助于进一步提高装置的灭活效果。
Based on a self-developed hydrodynamic cavitation reaction device,Escherichia coli and total colony count in a non-potable water source were chosen as the indicator bacteria to study the effects of the cavitation number,the throat velocity,the arrangement of orifice,the initial concentration of raw water,and the cavitation time on the inactivation rates of Escherichia coli and total colony count by different combinations of the multi-orifice plate,the Venturi throat,and the diffusion angle.The experimental results showed that the optimal inactivation effect was achieved as the combined form was staggered with 25-orifice multi-orifice plate,throat length of 300 mm,and diffusion angle of 4.3°.In addition,reducing the cavitation number,increasing the throat velocity,prolonging the cavitation time,and selecting a proper initial concentration of raw water would improve the inactivation effects of Escherichia coli and total colony count.
作者
董志勇
张邵辉
杨杰
李大庆
柳文菁
DONG Zhiyong;ZHANG Shaohui;YANG Jie;LI Daqing;LIU Wenjing(College of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310023,China)
出处
《浙江工业大学学报》
CAS
北大核心
2019年第3期268-272,共5页
Journal of Zhejiang University of Technology
基金
国家自然科学基金资助项目(51479177)
关键词
方形孔口多孔板
文丘里管
水力空化
菌落总数
大肠杆菌
灭活率
square multi-orifice plate
Venturi tube
hydrodynamic cavitation
total colony count
Escherichia coli
inactivation rate