Abstract：
Hydrodynamic cavitation (HC) was a kind of advanced oxidation mode. There were defects in the common HC devices, such as high energy consumption, low efficiency, and easy plugging. In order to effectively utilize HC, it was urgent to research new HC devices and used them together with other traditional water treatment methods. Ozone was widely used as a water treatment agent that does not produce harmful by-products. Sodium hypochlorite (NaClO) was efficient and cheap, but too much chlorine will be harmful to water. The combination of ozone and NaClO with the HC device of propeller orifice plate can improve the dissolution and utilization rate of ozone in wastewater, reduce the use of NaClO, and avoid the generation of residual chlorine. The degradation rate reached 99.9% when the mole ratio γ of NaClO to ammonia nitrogen (NH3-N) was 1.5 and the residual chlorine was near zero. As for the degradation rate of NH3-N or COD of actual river water and real wastewater after biological treatment, the ideal mole ratio γ was also 1.5 and the ideal O3 flow rates were 1.0 L/min. The combined method has been preliminarily applied to actual water treatment and was expected to be used in more and more scenarios.
摘要：
水力空化是一种高级氧化模式。常见的HC装置存在缺陷，例如高能耗，效率低,和容易插入。为了有效利用HC，迫切需要研究新的HC设备，并将其与其他传统的水处理方法一起使用。臭氧被广泛用作不产生有害副产物的水处理剂。次氯酸钠(NaClO)既高效又廉价,但是过多的氯会对水有害。将臭氧和NaClO与螺旋桨孔板的HC装置相结合，可以提高臭氧在废水中的溶解和利用率，减少NaClO的使用，避免余氯的产生。当NaClO与氨氮（NH3-N）的摩尔比γ为1.5且残留氯接近零时，降解率达到99.9％。实际河水和实际废水经生物处理后的NH3-N或COD降解率。理想的摩尔比γ也为1.5，理想的O3流量为1.0L/min。该组合方法已初步应用于实际水处理中，并有望在越来越多的场景中使用。
