Abstract: In the experiment of photocatalysis treatment for reactive-purple dye waste water，the index of decolorization rate of solid-phase was first used to replace the conventional decolorization rate of liquid-phase，and the optimum operation conditions of decolorization were as follows. TiO2 content 1g/L，waste water initial concentration 60 mg/L，air input 0.8 m3/h，lamp power 105 W. In experimental analysis of organic substance degradation，a new explanation about organic substance degradation was given by using several indices in combination.

摘要： 在光催化处理活性紫废液的实验研究中，首先以新建固相脱色率为指标得出脱色的适宜操作条件，即TiO2含量1 g/L、废液初始浓度60 mg/L、设备进气量0.8 m3/h、灯功率105 W；然后在适宜操作条件下进行有机物降解的实验与分析，试图通过多指标的联合使用对有机物降解过程给出新解释。