催化臭氧化处理难降解工业废水工艺的优化研究

Process Optimization of Refractory Industrial Wastewater Treatment by Catalytic Ozonation

采用正交试验法,研究了Ni2O3、MnO2、Al2O3及CuO等可回收非均相金属氧化物催化臭氧化处理难降解工业园区综合废水的最佳工艺条件。结果表明,在臭氧浓度恒定在30 mg/L的条件下,当催化剂Ni2O3的投加量不超过2 g/L、pH值为10、臭氧投加量为40 mg/L、气体流量为0.8 L/min时,催化臭氧化效果最好,对COD的去除率最高,出水COD浓度能够达到国家一级A排放标准。

Recoverable heterogeneous metal oxides such as Ni2O3, MnO2, Al2O3 and CuO were applied for advanced treatment of the treated effluent of an industrial development zone. The optimal conditions were studied with an orthogonal experiment. The results showed that the catalytic efficiency was the highest, namely the COD removal rate was the highest, when the catalyst Ni2O3 dosage was less than 2 g/L, pH was 10, ozone dosage was 40 mg/L, and the gas flow rate was 0.8 L/min. The effluent COD could meet the level A criteria of the national discharge standards.