摘要：

以商业化的柱状TiO₂为载体，通过浸渍法制备了Ru/TiO₂催化剂，并应用于湿式催化氧化处理垃圾渗滤液膜浓缩液。通过单一因素试验确定了最佳工艺条件：反应温度为220℃，反应时间为2 h，空气量为理论空气量的120%，催化剂投加量为3 g/L，进水pH为9。在此最优工艺条件下，固定床连续装置连续运行240 h，COD、TN的去除率可分别稳定在80%、60%以上，催化剂性能稳定，活性组分流失少。垃圾渗滤液膜浓缩液经过湿式催化氧化处理后，废水BOD₅/COD由0.03提高到0.3~0.4，可生化性得到了明显地改善。

关键词: 湿式催化氧化, 垃圾渗滤液, 催化剂, 可生化性

Abstract:

Ru/TiO₂ catalyst was prepared via impregnation method by supporting Ru on commercial columnar TiO₂ supports, which was applied to degrading landfill leachate membrane concentrate by catalytic wet air oxidation. Based on single-factor experiments, the optimum conditions were as follows: the reaction temperature 220℃, the reaction time 2 h, the amount of air 120% of theoretical air demand, the dosage of catalyst 3 g/L, and pH 9. The continuous reaction was operated on a fixed bed reactor for 240 h under the optimum conditions, the removal rate of COD and TN were above 80% and 60% respectively, and the catalyst exhibited high stability in terms of the low loss of active components. After catalytic wet air oxidation treatment of landfill leachate membrane concentrate, BOD₅/COD increased from 0.03 to 0.3-0.4, indicating the wastewater biodegradability significantly improved.

Key words: catalytic wet air oxidation, landfill leachate, catalyst, biodegradability

中图分类号: 

• X703.1