当前位置: X-MOL 学术Ozone Sci. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Intensification of Ozone Mass Transfer and Generation of Hydroxyl Radicals by Ceramic Membrane
Ozone: Science & Engineering ( IF 2.7 ) Pub Date : 2021-08-09 , DOI: 10.1080/01919512.2021.1960149
Shu Zhu 1 , Geng Cheng 1 , Xuejun Quan 1 , Facheng Qiu 1 , Weiyang Bai 1 , Yijuan Tian 1
Affiliation  

ABSTRACT

The strengthening ability of ozone to treat the reverse osmosis concentrate (ROC) of landfill leachate is a crucial issue. From the standpoint of coupling intensification, a ceramic membrane/ozone (CM/O3) system was developed to improve the oxidation performance of ozone. The results showed that CM/O3 system could significantly improve the ozone concentration and the generation of hydroxyl radicals (·OH) when compared to the traditional O3 bubble system. The reaction condition, such as inlet ozone concentration and ozone flow, ceramic membrane pore size, transmembrane pressure, and temperature on the concentration of ozone in the liquid phase and the formation of ·OH, has been considered. Experimental results showed that the concentration of ozone and OH in the liquid increased with the increase in the inlet ozone concentration and ozone flow. Moreover, a certain degree of reduction in membrane pores was facilitated to intensify the mass transfer of ozone. The increase of pressure was able to raise the concentration of ozone. However, there was a slight effect on ·OH concentration. As for the temperature, a low-temperature situation was conducive to strengthen ozone dissolution. In terms of the generation of ·OH, a high-temperature situation was a better favorable environment.

In order to evaluate the performance of the reactor system, three treatment processes (CM/O3, CM alone and O3 alone) were compared to treat ROC. In the CM/O3 system, the final removal efficiency of Chemical Oxygen Demand (COD) was 81.9%, and the final removal efficiency of Total Organic Carbon (TOC) was 62.6%.



中文翻译:

陶瓷膜强化臭氧传质和羟基自由基的产生

摘要

臭氧对垃圾渗滤液反渗透浓缩液(ROC)的处理能力的加强是一个关键问题。从耦合强化的角度出发,开发了陶瓷膜/臭氧(CM/O 3)系统以提高臭氧的氧化性能。结果表明,与传统的O 3相比,CM/O 3体系可以显着提高臭氧浓度和羟基自由基(·OH)的产生。气泡系统。考虑了入口臭氧浓度和臭氧流量、陶瓷膜孔径、跨膜压力、温度等反应条件对液相中臭氧浓度和·OH形成的影响。实验结果表明,随着入口臭氧浓度和臭氧流量的增加,液体中臭氧和OH的浓度增加。此外,一定程度的膜孔减少有助于加强臭氧的传质。压力的增加能够提高臭氧的浓度。然而,对· OH浓度有轻微影响。在温度方面,低温情况有利于加强臭氧溶解。就世代而言·哦,高温情况是一个更好的有利环境。

为了评估反应器系统的性能,比较了三种处理工艺(CM/O 3、单独的CM 和单独的O 3)来处理ROC。在CM/O 3系统中,化学需氧量(COD)的最终去除效率为81.9%,总有机碳(TOC)的最终去除效率为62.6%。

更新日期:2021-08-09
down
wechat
bug