太阳能固定膜光催化灭菌的特性

Disinfection characteristics of E.coli in a solar photocatalytic reactor with immobilized catalyst

以实用型太阳能固定膜光催化中试装置对水中大肠杆菌的灭活特性进行了研究.结果表明,太阳能固定膜光催化灭菌包含光催化灭菌和阳光直接灭菌的协同作用,光催化杀菌效果优于阳光的直接杀菌效果.环境扫描电镜分析(ESEM)表明,光催化处理对菌体产生了致命性破坏.光催化灭菌还具有良好的持久性,灭菌处理8h后,没有出现明显复活再生现象.光催化灭菌速率随循环流速、光强的增大而增大.太阳能固定膜光催化灭菌技术具有良好的应用前景.

The disinfection of Escherichia coli was investigated in a pilot-scale solar photocatalytic reactor with an immobilized catalyst. It was found that the disinfection was caused by the synergistic effect of solar UV irradiation and oxidant species generated by the TiO2catalyst, and the latter had greater effects than the former. ESEM analysis revealed that the bacterial cells were destroyed by the solar photocatalysis. Further studies showed that the disinfection rate increased with water flow rate and light intensity. It seems that the solar photocatalysis disinfection technique has a promising future in drinking water treatment. K