以钢渣、粉煤灰、黏土、剩余活性污泥和过渡金属盐类为原料，利用固相混合法制备得到陶粒催化剂，并对焦化废水生化尾水进行臭氧催化深度处理研究。以COD去除率为评价指标，考察了催化剂活性组分种类与质量分数、催化剂质量浓度、臭氧投加量、焙烧温度及废水初始pH等工艺条件对COD去除率的影响。结果表明，Mn-TiO₂双活性组分质量分数为8%、焙烧温度为1 110℃、废水初始pH为7.12、臭氧投加量为5.81 mg/min、催化剂质量浓度为20 g/L时，陶粒催化剂对焦化废水的处理效果最佳。废水的COD从100.08 mg/L降至44.12 mg/L，去除率高达55.92%。出水水质满足新修订的焦化废水排放标准。催化剂重复使用10次，活性无明显衰减，COD去除率均保持在50%以上。

A kind of ceramsite catalyst is prepared by means of solid phase mixing method with steel slag,fly ash,clay,residual activated sludge and transition metal-based salts as raw materials.The catalyst is utilized to perform advanced catalytic oxidation treatment against the biochemical tail water of coking wastewater.With COD removal rate as the evaluation index,the effects of the types and additions of active components in the catalyst,catalyst dosage,ozone dosage,the calcination temperature of catalyst and the initial pH of wastewater on COD removal rate are investigated.The results show that the ceramsite catalyst has the optimal treatment effect on coking wastewater as the addition amount of Mn-TiO₂ double active component is 8%,the calcination temperature of catalyst is at 1,110℃,the initial pH of wastewater is 7.12,the ozone dosage is 5.81 mg·min^-1,and the catalyst dosage is 20 g·L^-1.Under the optimal conditions,the concentration of COD in wastewater decreases from 100.08 mg·L^-1 to 44.12 mg·L^-1,with a removal ratio as high as 55.92%,and the effluent water quality can meet China's newly revised discharge standards of coking wastewater.After the catalyst has been reused for 10 times,its activity does not drop significantly and COD removal rate remains above 50%.

贾彪(1994-),男,硕士研究生,研究方向为废水的深度处理,1435707519@qq.com