In this study, ozone catalysts (hydrogenation-modified red mud, HM-RM) successfully prepared by hydrogenation-modification of industrial hazardous solid waste red mud (RM) as a raw material in accordance with the viewpoint of treating waste with waste and using waste. Meanwhile, as for the common phenomenon of membrane fouling, uneven distribution of multiphase solid catalysts and ozone in liquids, the addition of ultrasound can not only disperse materials, but also play a role in online cleaning of ceramic membranes and catalysts. The optimum treatment conditions for Rhodamine B (RhB) solution with volume of 2 L and concentration of 40 mg/L were catalyst concentration of 0.4 mg/L, reaction temperature of 45 °C, ultrasonic time of 1 h, ultrasonic intensity of 600 W, removal rate of RhB was up to 90 %. In addition, the computational fluid dynamics (CFD) simulation method was used to investigate the fluid flow between the two gas-liquid phases and the effect of the negative pressure of the membrane pump on the fluid by the analysis of flow, pressure and ozone flux of the ceramic membrane(CM) reaction apparatus. The CFD simulation results showed that at the inlet gas-liquid flow rate of 3 m/s and the negative pressure of 20,000 Pa, the maximum flow rates of CM-1 were 3 m/s, 0.752 m/s for CM-2, and 0.228 m/s for CM-3, respectively. Vortices, which are beneficial to solid-liquid mixing and gas-liquid mass transfer, formed between the suction port CM-1 of CM-1 and the inlets of CM-2 and CM-3. This discovery is consistent with relevant experimental research results. Significantly higher concentrations of both •OH and dissolved ozone were observed in the US/HM-RM/O system compared to other systems, indicating the significant improvement in ozone utilization rate through the application of ultrasound. The superiority of the US/HM-RM/O device was demonstrated. The real dye effluent was tested under optimum operating conditions and the results showed that COD and TOC were reduced by 81.34 % and 60.23 % respectively after 180 min of treatment. The above research can provide technical support for the treatment of dye wastewater using Ultrasound-enhanced ozone oxidation ceramic membranes.

中文翻译：

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连续超声臭氧耦合技术辅助陶瓷膜污染控制耦合强化多相混合处理染料废水及CFD流场模拟

本研究本着以废处理、废物利用的观点，以工业危险固废赤泥（RM）为原料，通过加氢改性成功制备了臭氧催化剂（加氢改性赤泥，HM-RM）。 。同时，针对常见的膜污染、多相固体催化剂分布不均、臭氧在液体中的现象，超声波的加入不仅可以分散物料，还可以起到陶瓷膜和催化剂的在线清洗作用。体积2 L、浓度40 mg/L的罗丹明B(RhB)溶液的最佳处理条件为催化剂浓度0.4 mg/L、反应温度45 ℃、超声时间1 h、超声强度600 W。 ，RhB去除率高达90%。此外，采用计算流体动力学（CFD）模拟方法，通过流量、压力和臭氧通量分析，研究气液两相之间的流体流动以及隔膜泵负压对流体的影响陶瓷膜（CM）反应装置。 CFD模拟结果表明，在入口气液流量为3 m/s、负压为20000 Pa时，CM-1的最大流量为3 m/s，CM-2的最大流量为0.752 m/s， CM-3 的速度分别为 0.228 m/s。 CM-1的吸入口CM-1与CM-2、CM-3的入口之间形成有利于固液混合和气液传质的涡流。这一发现与相关实验研究结果一致。与其他系统相比，US/HM-RM/O 系统中的·OH 和溶解臭氧浓度显着升高，表明超声波的应用显着提高了臭氧利用率。 US/HM-RM/O装置的优越性得到了证明。在最佳操作条件下对实际染料废水进行测试，结果表明，处理180 min后，COD和TOC分别降低了81.34%和60.23%。上述研究可为超声增强臭氧氧化陶瓷膜处理染料废水提供技术支撑。