论文部分内容阅读
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 paper, a self-developed variable divergence angle venturi hydrodynamic cavitation device was used to sterilize different proportioning water samples of raw water from Shangtang River in Hangzhou. The total number of colonies and Escherichia coli as indicator microbes. The killing effect of hydraulic cavitation on the pathogenic microorganisms in raw water can be characterized by detecting and analyzing the total number of colonies and the killing rate of E. coli. The effects of diffusion angle, raw water concentration, throat velocity, cavitation number and time of hydrodynamic cavitation on the total number of colonies and the killing rate of E. coli were studied. The experimental results show that choosing appropriate venturi diffusion angle and raw water ratio, increasing throat flow rate or reducing cavitation number, prolonging the time of hydrodynamic cavitation can be beneficial to the killing of pathogenic microorganisms in raw water. Hydraulic cavitation can kill pathogenic microorganisms in raw water, which is a safe, efficient, non-disinfection by-product drinking water disinfection new technology.