臭氧氧化—曝气生物滤池联合工艺处理低温高浓度苯酚废水

Treatment of High Concentration Phenol-containing Wastewater at Low Temperature by Ozone Oxidation-BAF Process

采用臭氧氧化—曝气生物滤池(BAF)联合工艺处理低温高浓度苯酚模拟废水。应用Design-Expert 7.1设计系统对臭氧氧化高浓度苯酚模拟废水进行了参数优化。实验结果表明:在低温(5～10℃)、臭氧加入量为0.67 g/L、进水pH为9.85的条件下,臭氧氧化出水苯酚质量浓度为1 237.6 mg/L,苯酚去除率为38.12%;臭氧氧化后的废水经调节pH至7.00～8.00后进入BAF,经BAF处理后的出水苯酚质量浓度小于0.5 mg/L。该工艺操作简单,处理效果稳定,出水水质达到GB8978—1996《污水综合排放标准》。

The simulated wastewater with high concentration phenol was treated at low temperature by ozone oxidation -biological aerated filter （BAF） process. The parameters for ozone oxidation were optimized using Design-Expert 7.1 design system. Under the conditions of temperature （5 - 10 ℃ ）, ozone dosage 0.67 g/L and influent pH 9. 85, the phenol mass concentration in ozone oxidation effluent is 1 237.6 mg/L, and the phenol removal rate is 38. 12% ; The ozone oxidation effluent is adjusted to pH 7.00 - 8.00 and then introduced into BAF. The phenol mass concentration in BAF effluent is less than 0.5 mg/L. The process is simple and stable, and the final effluent quality can meet the discharge standards of GB8978 - 1996.