太阳能是一种最理想的绿色能源，难降解有机废水是石油化工生产过程中亟待解决的难题之一。本项目以太阳能利用及难降解有机废水处理为目的，基于我们已经建立的STEP理论过程，全部以太阳能为能源，同时利用光-电-热一体化耦合作用将难降解有机废水（以丙烯腈废水为模型）氧化降解处理。主要研究内容是利用太阳能光电热能级、光谱、电势、效率完美匹配原则，调控构建高效太阳能【一级作用[光]-二级作用[电-热]-三级作用[热（直接热、热解）/电（电场、电化学）/光（光解、光敏、光催化）]】集成耦合难降解有机废水处理的STEP理论和系统，并建立适用于难降解有机废水（以丙烯腈废水为模型）的集成化、模型化STEP处理流程和工艺技术。此系统能量全部来自太阳能，丙烯腈氧化脱除率达90%，系统太阳能利用总效率高于40%，是一种绿色、经济，有工业化前景的新方法，对拓展太阳能利用及解决日益严重的水资源缺乏和水污染问题意义深远。

Solar energy is the most optimal green energy source and acrylonitrile wastewater is a great problem in petrochemical industry process. Based on the established STEP (Solar Thermal Electrochemical Production) theory, our project which aims at solar energy utilization and acrylonitrile wastewater treatment uses solar energy as the only energy resource to treat acrylonitrile wastewater by photo-electricity-thermal integrated coupling effect. The main research content is that exploiting the perfect matching principle of energy level, spectrum, potential and efficiency of solar energy photo-electricity-thermal, to study and build a high efficiency solar integrated acrylonitrile wastewater treating STEP theory and system. Finally, a integrated modeling treatment procedure and technology suitable for acrylonitrile wastewater treatment will be built. The whole system energy resource comes from solar energy and the utilization efficiency can be higher than 40%, together with the 90% acrylonitrile removal rate make the system an environmental friendly, economic and promising new method, which is very important for applying solar energy in environment-protecting and solving the increasingly serious water deficiency/pollution problem.