Abstract:

To make advanced treatment of wastewater from butadiene-based PA66 salt production, the research of ozone catalyst was conducted, and a combined process of high-efficiency sedimentation+pre-ozone catalytic oxidation+two-stage pre-denitrification+post-ozone catalytic oxidation was introduced. The results showed that the treatment effect of the whole process was in a relatively stable condition. The effluent with COD≤40 mg/L, NH₃-N≤2 mg/L, and TN≤5 mg/L was better than first class A effluent index of Pollutant Emission Standards for Urban Sewage Treatment Plants(GB 18918-2002). In the process of bacterial culture, post-ozone catalytic oxidation had NH₃-N removal rate of 81.1% and TN removal rate of 63.7%, showing great performance in NH₃-N and TN removal. Meanwhile, pre-ozone catalytic oxidation had a better performance in COD removal, and the mass ratio between ozone consumption and COD removal was 1.64∶1. The operating cost of the whole process for treating wastewater from PA66 salt producted by butadiene was 4.86 yuan/t. The whole process was cost-effective compared to deep treatment project. It provides reference for similar wastewater treatment.

Key words: butadiene, PA66, advanced treatment, ozone catalytic oxidation

摘要：

针对某企业丁二烯法尼龙66盐生产废水生化出水，研发特定的臭氧催化剂，采用高效沉淀+前臭氧催化氧化+两级前置反硝化+后臭氧催化氧化处理工艺进行深度处理。运行结果表明，系统处理效果稳定，出水COD≤40 mg/L、氨氮≤2 mg/L、总氮≤5 mg/L，远优于《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A排放标准。生化池细菌培养期间，后臭氧催化氧化池对于氨氮、总氮平均去除率分别为81.1%、63.7%，表现出优异的同步去除氨氮、总氮性能，前臭氧催化氧化池对COD去除效果较好，平均臭氧消耗量与COD去除量的质量比为1.64∶1。高效沉淀+前臭氧催化氧化+两级前置反硝化+后臭氧催化氧化处理工艺处理丁二烯法尼龙66盐生产废水吨水运行成本4.86元，具有较好的经济性，为类似行业废水处理提供参考。

关键词: 丁二烯, 尼龙66, 深度处理, 臭氧催化氧化

CLC Number: 

• X703