The present study investigates the wastewater treatment performance of an acoustic cavitation assisted plasma (ACAP) process in a circulating reactor using Rhodamine B (RhB) as a model water pollution. The concept of this process was proposed by the authors recently for a batch type rector. The measurements revealed that combining the ultrasound irradiation with pulsed discharge plasma allows the RhB degradation efficiency to be drastically increased as compared with the plasma-alone case. This effect is especially significant at higher values of solution electrical conductivity examined in a range of 20 ~ 400 μS/cm. Acidic conditions and larger flow rates of solution were found to be favorable for the degradation efficiency. The effect of flow rate was also analyzed through numerical simulation. The results indicated that the mass transfer of RhB to the plasma-cavitation zone is one of the controlling parameters influencing the degradation performance. Behavior of bubbles and pulse discharge frequency were examined using a high-speed video camera. Relatively large bubbles were found to favor the plasma pulse generation and propagation when move near the high-voltage electrode. On the whole, the results of this study suggest that the ACAP process has the potential to synergistically extend the application area of underwater plasma in both research and industry.

本研究调查了使用罗丹明B（RhB）作为模型水污染的循环反应器中声空化辅助等离子体（ACAP）工艺的废水处理性能。该过程的概念是最近由作者提出的用于批处理程序的概念。测量结果表明，与仅使用等离子体的情况相比，将超声辐射与脉冲放电等离子体相结合可以显着提高RhB的降解效率。在20〜400μS/ cm范围内检测到较高的溶液电导率值时，此效果尤为明显。发现酸性条件和较大的溶液流速有利于降解效率。还通过数值模拟分析了流速的影响。结果表明，RhB向等离子体空化区的传质是影响降解性能的控制参数之一。使用高速摄像机检查了气泡的行为和脉冲放电频率。当在高压电极附近移动时，发现相对较大的气泡有利于等离子体脉冲的产生和传播。总体而言，这项研究的结果表明，ACAP工艺具有协同扩展水下等离子体在研究和工业应用领域的潜力。当在高压电极附近移动时，发现相对较大的气泡有利于等离子体脉冲的产生和传播。总体而言，这项研究的结果表明，ACAP工艺具有协同扩展水下等离子体在研究和工业应用领域的潜力。当在高压电极附近移动时，发现相对较大的气泡有利于等离子体脉冲的产生和传播。总体而言，这项研究的结果表明，ACAP工艺具有协同扩展水下等离子体在研究和工业应用领域的潜力。