PAC预混凝－臭氧氧化法处理喷漆废水的试验研究

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关键词：喷漆废水；聚合氯化铝（PAC）；臭氧氧化法

中图分类号：X703 文献标识码：A 文章编号：1008-9500（2025）05-0044-03

DOI： 10.3969/j.issn.1008-9500.2025.05.010

Abstract： Poly Aluminum Chloride （PAC） precoagulation-ozone oxidation method is adopted to treat spray painting wastewater，and the process parameters such as PAC dosage，pH value，ozone acceleration rate，oxidation time and MnO2 （20 dosage are optimized. Under optimal conditions，PAC precoagulation achieved a removal rate of 45.34% for Chemical Oxygen Demand （COD）， 59.67% for ozone oxidation stage，and a total COD removal rate of 77.98% for the combined process，and the effluent COD concentration was reduced to 395.4mg/L ， meeting the requirements of biochemical treatment. Research has shown that PAC precoagulation can efectively reduce suspended solids concentration and improve ozone oxidation efficiency，with a significant synergistic effect between the two.

Keywords： painting wastewater; Poly Aluminum Chloride （PAC）; ozone oxidation

汽车喷漆废水具有化学需氧量（Chemical OxygenDemand，COD）浓度高、色度深、可生化性差、处理难度大等特点，对环境造成显著威胁[1。（剩余4527字）