Abstract In recent years, a new water treatment technology based on microwave discharge electrodeless lamp (MDEL) has been developed. Hence, we designed an integrated system of microwave/electrodeless discharge ultraviolet/ozone (MW/UV/O3) for sewage sterilization according to the theoretical study of MDEL. The experiment was designed to test the ability to sterilize Escherichia coli and Bacillus subtilis by using different process conditions, such as single O3, MW/UV and MW/UV/O3, aiming to find an optimal process route. The results showed that the bactericidal effect of MW was mainly thermal effect, the bactericidal effect of MW/UV was significantly affected by turbidity, while the bactericidal effect of MW/UV/O3 was better than single O3 and MW/UV. In the dynamic test, when the four electrodeless UV lamps were stable, the light intensity reached 3.6 mW/cm2; when the aeration rate was 50 L/min, the generated O3 content was 0.30 mg/L. With a water flow of 800 L/h and hydraulic retention time of 1.5 min, a sewage sterilization rate of >99.99% was achieved by MW/UV/O3 system, and other water quality indexes including chemical oxygen demand (COD) and total organic carbon (TOC) in effluents was also decreased to some extents.

中文翻译：

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微波/无电极放电紫外线/臭氧杀菌技术在中水回用中的应用

摘要 近年来，基于微波放电无极灯（MDEL）的水处理新技术得到了发展。因此，我们根据MDEL的理论研究，设计了一种微波/无电极放电紫外线/臭氧（MW/UV/O3）集成系统用于污水杀菌。本实验旨在测试使用单一O3、MW/UV和MW/UV/O3等不同工艺条件对大肠杆菌和枯草芽孢杆菌的杀菌能力，旨在寻找最佳工艺路线。结果表明，MW的杀菌效果主要是热效应，MW/UV的杀菌效果受浊度的影响显着，而MW/UV/O3的杀菌效果优于单独的O3和MW/UV。在动态测试中，当四个无极紫外灯稳定时，光强达到3.6 mW/cm2；当曝气量为50 L/min时，产生的O3含量为0.30 mg/L。水流量800 L/h，水力停留时间1.5 min，MW/UV/O3系统对污水杀菌率>99.99%，化学需氧量（COD）、总有机物等水质指标出水中的碳（TOC）也有一定程度的降低。