In the present study, we proposed an effective, efficient, and economical approach to disinfect water using a novel, advanced, rotational hydrodynamic cavitation reactor (HCR). First, analyses of the flow field and cavitation generation mechanism in the HCR were conducted through visualization of the reactor flow field using a high-speed camera. Second, the thermal performance was tested in 20 experiments with various rotational speeds of the rotor (2700, 3000, 3300, and 3600 rpm) and pump pressure settings (0.0, 0.5, 0.7, 1.0, and 1.5 bar gauge pressure). The HCR maximally achieved a heat generation rate of 48.15 MJ/h and thermal efficiency of 82.18%. Then, the disinfection effect was evaluated using water that simulated an effluent containing Escherichia coli (E. coli) for various flow rates (8, 11, and 14 L/min), a pump pressure setting fixed at 0.5 bar, and a rotational speed of 3600 rpm. In addition, an economical assessment of the disinfection processes was performed by considering the measured electric consumption. The thermal effect generated by the HCR was the dominant factor affecting the concentration of E. coli. The HCR achieved a 100% disinfection rate with a 4.3 L/min treatment rate and a cost of US $ 3.019/m³ at the optimal flow rate. The effects of the pressure setting and rotational speed on the performance were discussed in detail. Finally, compared to the recent studies, the treatment rate of the HCR is several hundred times greater than that obtained by the HCRs utilized in those studies, and also has a reasonable cost.

在本研究中，我们提出了一种有效，高效，经济的方法，使用新颖，先进的旋转式流体动力空化反应器（HCR）对水进行消毒。首先，通过使用高速摄像机对反应堆流场进行可视化，对HCR中的流场和空化发生机理进行了分析。其次，在20个实验中对热性能进行了测试，其中包括转子的各种转速（2700、3000、3300和3600 rpm）和泵压力设置（0.0、0.5、0.7、1.0和1.5 bar表压）。HCR的最大发热量为48.15 MJ / h，热效率为82.18％。然后，使用模拟含有大肠杆菌（E. coli）的废水的水评估其消毒效果。对于各种流量（8、11和14 L / min），泵压力设置固定为0.5 bar，转速为3600 rpm。另外，通过考虑测量的电耗来对消毒过程进行经济的评估。HCR产生的热效应是影响大肠杆菌浓度的主要因素。在最佳流速下，HCR达到100％的消毒率，处理速率为4.3 L / min，成本为3.019美元/ m ³。详细讨论了压力设置和转速对性能的影响。最后，与最近的研究相比，HCR的治疗率是那些研究中使用的HCR的治疗率的数百倍，而且成本合理。