Abstract:

The feasibility of treating secondary effluent from petrochemical wastewater by O₃/Mn²⁺ process is studied in a pilot plant. The test results show that the addition of Mn²⁺ improves the efficiency of ozonation. When the pH of the wastewater is 5.80, the dosage of ozone is 84 mg/L, the dosage of Mn²⁺ is 1.5 mg/L, and the reaction time is 20 minutes, the removal rates of COD, TOC and chromaticity are 42%, 36% and 99%, which are 10%, 8% and 3% higher than the ozone treatment alone, respectively. Meanwhile, the ozone consumption is reduced from 75 mg/L to 66 mg/L. The wastewater treated by catalytic ozonation meets the first-class standard of Shanghai Integrated Wastewater Discharge Standard(DB 31/199-2018).

Key words: catalytic ozonation, manganese sulfate, petrochemical wastewater

摘要：

采用中试装置研究了O₃/Mn²⁺工艺处理石化废水二级出水的可行性。试验结果表明，Mn²⁺的加入提高了臭氧化的效率。当废水pH为5.80，臭氧投加量为84 mg/L，Mn²⁺投加量为1.5 mg/L，反应时间为20 min时，COD、TOC和色度的去除率分别为42%、36%和99%，比单独臭氧处理分别提高了10%、8%和3%，臭氧消耗量也从单独臭氧化的75 mg/L降低至66 mg/L，经催化臭氧化处理后的废水满足《上海市污水综合排放标准》（DB 31/199—2018）的一级标准。

关键词: 催化臭氧化, 硫酸锰, 石化废水

CLC Number: 

• X703.1