圆孔多孔板水力空化杀灭大肠杆菌的实验研究

在以圆形孔口多孔板为空化空蚀发生器的水力空化装置中，对含有大肠杆菌的水样进行灭菌处理.通过检测大肠杆菌的灭菌率，研究了水力空化对水中大肠杆菌的灭活效果.分析了大肠杆菌初始浓度，水流空化数，孔口流速，孔口排布，孔口数量，孔口大小，空化空蚀作用时间等参数对灭菌效果的影响.试验结果表明：提高流速，降低空化数，选取适当的初始浓度，延长空化空蚀作用时间，增加孔口数量，减小孔口大小以及改进孔口排布可以进一步提高大肠杆菌的杀灭率.水力空化的空化空蚀作用能够杀灭水中的大肠杆菌，是一种饮用水消毒的新技术.

Experimental study of Escherichia coli killed by hydrodynamic cavitation due to circular multi-orifice plates

Water samples containing Escherichia coli was treated by a hydrodynamic cavitation device with circular multi-orifice plates. The inactivation effects of hydrodynamic cavitation on Escherichia coli in water was experimentally studied by detecting the killing rate. The effects of initial concentration of Escherichia coli, cavitation number, orifice velocity, orifice arrangement, orifice number, orifice size and cavitation time on the killing rates were analyzed. The experimental results showed that increasing the orifice velocity, lowering cavitation number, choosing the appropriate initial concentration, improving the cavitation time, increasing the orifice number, decreasing the orifice size and improving orifice arrangement can further increase the killing rates of Escherichia coli in water.