水力空化强化臭氧消毒技术的影响因素研究

Study on Influencing Factors of Ozone Disinfection Enhanced by Hydrodynamic Cavitation

采用水力空化强化臭氧消毒技术对饮用水进行消毒，考察了臭氧体积流量、多孔板的几何参数及其入口压力、pH值等对消毒效果的影响。试验结果表明：适宜的臭氧体积流量为0．04m^3／h；提高多孔板的入口压力有利于改善消毒效果；在入口压力一定的条件下，多孔板的孔径越小则消毒效果越好，而当总孔周长与总过流面积之比一定时，过流面积比越大则消毒效果越佳；当pH值为4～10时，提高pH值有利于改善灭菌效果；单独水力空化、臭氧氧化以及它们的联合工艺对细菌的杀灭均遵循表观一级动力学模型。

Hydrodynamic cavitation was used to enhance ozone disinfection of drinking water. The influence of ozone volume flow rate, geometric parameters of orifice plate and its inlet pressure, pH on the disinfection effects was investigated. The results show that the optimum ozone volume flow rate is 0.04 m^3/h. Increasing the inlet pressure of orifice plate can improve the disinfection effects of drinking water. Under a certain inlet pressure, smaller apertures of the orifice plate have better effects of disinfec- tion. In addition, under a certain ratio of the total circumference of circular holes to the total area of openings, larger total areas of orifice plate openings have better effect of disinfection. The disinfection effect of drinking water also can be improved when the pH is at a higher range of 4 to 10. The disinfection of drinking water by individual hydrodynamic cavitation, ozonization and their combined process follows a pseudo-first-order kinetics.