Recent developments in UV-LED technology open up new possibilities for water treatment. TiO₂ photocatalysis can benefit from optimized photoreactor design to increase hydroxyl radical production and reduce its electrical energy per order (E_EO) demands, which still ranks high among advanced oxidation processes. However, literature on UV-LED photoreactor design is largely lacking. In this work, a detailed investigation of photoreactor design is proposed. The simulation of a lab scale cylindrical reactor with 8 different UV-LED arrays was run with the professional version of an optic software. The increase of radiant flux and irradiance on the reactor’s middle cross section and side walls, respectively, was related to an increasing number of LEDs and to a shorter distance from the reactor but not necessarily to an increase in homogeneity of light distribution. A full factorial experimental design was applied to evaluate the degradation of a representative contaminant of emerging concern (ciprofloxacin) considering 4 independent variables and their interactive effects on kinetic rates and E_EO values. The significance of these effects was evaluated with ANOVA and a prediction model was established. The results show that the presence of a TiO₂ nanofilm was the most significant tested effect. The number of LEDs, their distance from the reactor’s wall and the adoption of controlled periodic illumination also greatly influenced kinetic rates but were less relevant for reducing E_EO values because the energetic trade-off was not sufficient to turn the kinetic gain into lower electricity demands.

UV-LED 技术的最新发展为水处理开辟了新的可能性。TiO ₂光催化可以受益于优化的光反应器设计，以增加羟基自由基的产生并降低其每级的电能（E _EO) 的需求，在高级氧化工艺中仍居于前列。然而，在很大程度上缺乏关于 UV-LED 光反应器设计的文献。在这项工作中，提出了对光反应器设计的详细研究。使用专业版光学软件运行具有 8 个不同 UV-LED 阵列的实验室规模圆柱形反应器的模拟。反应器中间截面和侧壁上辐射通量和辐照度的增加分别与 LED 数量的增加和与反应器的距离缩短有关，但不一定与光分布均匀性的增加有关。考虑到 4 个自变量及其对动力学速率和E _EO值。使用方差分析评估这些影响的显着性并建立预测模型。结果表明，TiO ₂纳米膜的存在是最显着的测试效果。LED 的数量、它们与反应器壁的距离以及受控周期性照明的采用也极大地影响了动力学速率，但与降低E _EO值的相关性较小，因为能量权衡不足以将动力学增益转变为较低的电力需求.