ABSTRACT In order to improve the mass transfer efficiency of ozone in water, stainless steel wire mesh (SSWM) corrugated structure was packed into a microbubble ozone reactor to enhance the mass transfer efficiency. The results showed that the SSWM/O3 system could effectively improve the mass transfer efficiency. When the concentration of ozone in the liquid phase reached a stable state, it was about 21 mg/L, which was about 14% higher than that of ozone alone; the apparent mass transfer coefficient (KLa) was 0.7255 min−1, which was about 51% higher than that by ozone alone systems. The hydroxyl radicals in the SSWM/O3 system were more generated than that of ozone alone. After 6 min of operation, the concentration of hydroxyl radicals increased by 60 µmol/L compared with that in ozone alone system. The Chemical Oxygen Demand (COD) removal efficiency of biologically treated leachate by SSWM/O3 system was about 10% higher than that of ozone alone system after 120 min of reaction. The effects of pressure, temperature, ozone inlet concentration, and flow rates on the ozone concentration in the liquid phase and the generation of hydroxyl radicals were also investigated. The results indicated that reactor pressure has little effect on ozone concentration in liquid phase, but increasing pressure helps to generate ·OH; ozone concentration and ·OH generation in liquid phase increase with the increase of inlet ozone concentration and flow rate; ozone concentration in the liquid phase decreases with the increase of temperature, but ·OH generation increases with the increase of temperature. Our results indicate that the system consisting of SSWM and microbubble column reactor is an efficient process for the intensification of ozone-based advanced oxidation processes.

中文翻译：

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不锈钢丝网增强臭氧传质作用及其对羟基自由基生成的影响

摘要 为了提高臭氧在水中的传质效率，将不锈钢丝网（SSWM）波纹结构装入微气泡臭氧反应器中以提高传质效率。结果表明，SSWM/O3系统能有效提高传质效率。当液相中臭氧浓度达到稳定状态时，约为21mg/L，比单独使用臭氧时高约14%；表观传质系数 (KLa) 为 0.7255 min-1，比单独使用臭氧系统高约 51%。SSWM/O3 系统中的羟基自由基比单独的臭氧产生更多。运行6 min后，羟基自由基浓度较单独臭氧系统增加60 μmol/L。SSWM/O3 系统对生物处理渗滤液的化学需氧量 (COD) 去除率在反应 120 分钟后比单独使用臭氧系统高约 10%。还研究了压力、温度、臭氧入口浓度和流速对液相臭氧浓度和羟基自由基生成的影响。结果表明，反应器压力对液相臭氧浓度影响不大，但增加压力有利于产生·OH；液相臭氧浓度和·OH生成量随着入口臭氧浓度和流量的增加而增加；液相中臭氧浓度随温度升高而降低，但·OH生成量随温度升高而增加。