小型光催化滤池的设计与运行

Design and Operation of the Photocatalytic Filter

以透光的玻璃珠载体替代传统的生物膜滤池滤料,以纳米TiO2膜替代生物膜,利用纳米TiO2高效的光催化氧化降解有机污染物的能力,设计了一种新型的节能环保水处理回用装置—光催化滤池,并通过实验测试了其降解有机废水的效率以及光强、pH值及涂膜次数对降解效率的影响。实验结果表明,经过一定时间的运行,该装置对甲基橙、亚甲基蓝及活性红B-2BF的降解率均达到70%左右;对于活性红B-2BF废水,紫外光的光强Φ(Φ=3~9)越高,废水的pH(pH=1~7)越低,玻璃珠的涂膜次数N(N=1~5)越多,降解效率越高。

Based on high efficient photocatalysis and degradation of the nano-TiO2, a new device for water treatment and reuse, photocatalytic filter, was designed. The device was integrated photocatalytic reaction with biofilter by using transparent glass beads as filtering material and nano-TiO2 film as biological film. The influence of light intensity （φ）, pH and coating layers of TiO2 film （N） on the efficiency of degradation for the organic contaminant was investigated. Results showed that the degradation rate of methyl orange, methyl blue and Reactive Red B-2BF was all about 70%. For the wastewater of Reactive Red B-2BF, the degradation efficiency was increased with the intensity of UV light （φ=3-9） and the coating layers of TiO2 film （N=l^5）, whereas decreased with pH value 1-7.