【摘要】 采用微米气泡系统(平均粒径约为58μm)和普通的鼓泡系统进行对比研究微米气泡对臭氧氧化的强化作用机理.在相同的进气流率下,采用微米气泡体系臭氧在水中的传质系数和利用率是鼓泡系统的1.6—2.7倍和2.3—3.2倍.利用臭氧氧化模拟活性艳蓝KN-R废水(100mg·l-1)的实验结果表明,染料在微米气泡体系中的脱色速率高于鼓泡系统,二者达到99%脱色效率所需的时间分别为30min和60min.在同样的脱色速率下,染料在微米气泡系统中的TOC去除率较大,说明微米气泡不仅能够提高臭氧的传质速度,而且可以强化臭氧的氧化能力.更多还原

【Abstract】 Microbubble technology producing bubbles with an average diameter of 58 microns was applied to increase the mass transfer rate of ozone as well as to enhance the ozone oxidation of artificial RB 19 wastewater. Experiments were performed using both the microbubbles generator and the bubble contactor, which is commonly used in ozonation system, for comparison.Compared to the bubble contactor, the total mass transfer efficiency was 1.6—2.7 times higher and the ozone utilization rate was 2.3—3.2 times higher in the proposed microbubble system. The rates of decolourization and TOC removal were much faster in the microbubble system during the ozonation of RB 19 wastewater(100 mg·l-1). The time required for 99% removal of color was about 30 min after introducing ozone into the microbubble generator, compared to 60 min for the bubble contactor. At the same color removal efficiency, the microbubble system reached a higher TOC removal efficiency compared with the bubble contactor, indicating that the former not only enhanced the mass transfer of ozone, but also enhanced the capability of ozonation.更多还原