Solar-energy-enabled photocatalysis is promising for wastewater treatment. However, due to the changes in the solar position and variable weather conditions, providing optimized light and temperature for photocatalysis under actual weather remains to be a technical difficulty. In this study, a novel Linear Fresnel Photoreactor (LFP) was firstly developed for wastewater treatment. LFP could achieve effective adjustment of sunlight by flexibly controlling 6 mirrors according to solar position and weather conditions. On sunny condition, LFP could maintain the optimal light irradiance and temperature, while on overcast condition it could provide the highest possible light irradiance and temperature. In the comparative experiments between LFP and Inclined Plate Collector (IPC) (as control reactor) which passively receive sunlight, the Rhodamine B degradation efficiencies in LFP were 2.19 folds, 1.5 folds and 2.28 folds higher than control under the temporarily overcast, totally to slightly overcast and sunny conditions, respectively. In addition, the efficiencies of Amoxicillin degradation and Escherichia coli disinfection in LFP were also 2 folds and 1.37 folds higher than control in sunny conditions, respectively. Furthermore, whole-year estimation indicated that LFP is effective to optimize light irradiance and temperature in typical densely populated areas of the world to achieve high-efficiency wastewater treatment. These results proved that LFP, as an effective solar energy controllable reactor, has great potential in promoting the development of green wastewater treatment infrastructure to improve global public health and achieve eco-friendly society.

太阳能光催化在废水处理方面很有前景。然而，由于太阳位置的变化和多变的天气条件，在实际天气下为光催化提供优化的光和温度仍然是一个技术难点。在这项研究中，首次开发了一种用于废水处理的新型线性菲涅耳光反应器 (LFP)。LFP可以根据太阳位置和天气情况灵活控制6面镜子，实现对太阳光的有效调节。在阳光充足的条件下，LFP 可以保持最佳的光辐照度和温度，而在阴天条件下，它可以提供尽可能高的光辐照度和温度。在 LFP 与被动接收阳光的斜板集热器 (IPC)（作为控制反应堆）之间的对比实验中，在暂时阴天、完全到微阴和晴天条件下，罗丹明 B 在 LFP 中的降解效率分别比对照高 2.19 倍、1.5 倍和 2.28 倍。此外，阿莫西林的降解效率和在阳光充足的条件下，LFP 中的大肠杆菌消毒率也分别比对照高 2 倍和 1.37 倍。此外，全年估算表明，LFP 可有效优化世界典型人口稠密地区的光辐照度和温度，以实现高效废水处理。这些结果证明，LFP作为一种有效的太阳能可控反应器，在促进绿色污水处理基础设施的发展、改善全球公共卫生、实现生态友好型社会方面具有巨大潜力。