摘要： 采用中试装置，考察了NiO/Al₂O₃催化臭氧技术深度处理城市污水厂出水的可行性。结果表明，NiO/Al₂O₃催化剂加大了臭氧在水中的溶解度，并促进羟基自由基的产生，相同条件下，NiO/Al₂O₃催化臭氧化工艺对COD、DOC、NH₄⁺-N、NO₃^--N的去除率分别为50.4%、49.3%、57.6%、35.1%，比单独臭氧工艺分别提高了25.7%、27.5%、46.8%、31.2%。在催化剂投加质量浓度10 g/L，臭氧投加量53.3 mg/min，水力停留时间30 min下，出水COD满足《地表水环境质量标准》（GB 3838—2002）Ⅴ类标准。NiO/Al₂O₃催化剂稳定性良好。

关键词: NiO/Al₂O₃, 二级出水, 深度处理, 催化臭氧化, 回用

Abstract: The feasibility of catalytic ozonation technology for the advanced treatment of effluent in urban sewage plants has been investigated. The results show that NiO/Al₂O₃ catalytic ozonation can improve the solubility of ozone in water,and accelerate the production of hydroxyl radicals. Under the same conditions,the removing rates of COD, DOC,NH₄⁺-N and NO₃^--N by NiO/Al₂O₃ catalytic ozonation process are 50.4%,49.3%,57.6% and 35.1%,respectively. The results are higher than that of ozone alone by 25.7%,27.5%,46.8% and 31.2%,respectively. When the mass concentration of the catalyst is 10 g/L,O₃ dosage 53.3 mg/min and hydraulic retention time 30 min,the effluent COD reaches Class Ⅴ standard,specified in the Standard of Environmental Quality Standards for Surface Water(GB 3838-2002). NiO/Al₂O₃ catalyst has good stability.

Key words: NiO/Al₂O₃, secondary effluent, advanced treatment, catalytic ozonation, reuse

中图分类号: 

• X703