基于光伏-光催化混合水处理系统的实验研究

EXPERIMENTAL STUDY BASED ON A PHOTOVOLTAIC-PHOTOCATALYTIC HYBRID WATER PURIFICATION SYSTEM

提出并建立具有光伏发电和污水处理双重功能的光伏-光催化混合水处理(SOLWAT)系统,实验考察太阳辐照度约950 W/m^2、环境温度约33℃及风速约3 m/s条件下温度和模拟废水的光谱吸收对光伏组件发电效率的影响,研究该系统对3种模拟机污染物:亚甲基蓝(MB)、酸性红26(AR26)和对氯苯酚(4-Cp)的降解性能。结果表明:SOLWAT系统的电池组件工作温度低于仅具有单一光伏发电功能的参比系统,但其发电效率因模拟废水的光谱吸收作用而低于参比系统。SOLWAT系统对上述3种模拟有机污染物的降解率均达99%,模拟污染物光催化降解反应动力学的反应级数均为一级,矿化率达80%以上。

A photovohaic-photocatalytic hybrid water purification （SOLWAT）system, which could realize photovohaic power generation and water purification simultaneously, was proposed and established in the present paper. Influences of temperature and liquid absorption on the generating efficiency were investigated experimentally under about 950 W/m2 solar irradiance, ambient temperature 33 ℃and and 3 m/s wind speed. Degradation efficiency of three kinds of simulated organic pollutants, including methylene blue （MB）, acid red 26 （AR26）and 4-chlorophenol （4-Cp）, was studied using the SOLWAT system. The results showed that the photovoltaic module of SOLWAT system can be kept at a low temperature, but due to the strong spectral absorption of the simulated organic pollutants, the comprehensive generating efficiency of the SOLWAT system was lower than that of the reference system with single photovohaic power generation function. The degradation rates of the SOLWAT system for all the three different organic pollutants were above 99%, the reaction kinetics of photocatalytic degradation reaction was first order kinetics, and the mineralization rates were above 80%.