插入式紫外–臭氧反应器对棕化废液的解络和降解

Decomplexation and degradation of brown oxidation wastewater in submerged UV–O_3 reactor

采用不同的紫外光(UV)和臭氧(O3)组合反应器处理棕化废液,寻找解离棕化废液中配合物和降解其中有机物的最佳工艺。结果表明,运用插入式UV–O3反应器处理棕化废液时,对配合物的解络效果最好;有机物的降解效果虽较悬空式UV–O3反应器略差,但比单独用紫外光催化或臭氧催化反应器时好,6h内COD能从12357mg/L降至6730mg/L。采用插入式UV–O3反应器处理棕化废液的最优工艺为:光催化剂中TiO2与AC的负载比为3mg/g,臭氧催化剂中MnOx与AC的负载比为5mg/g,光、臭氧催化剂质量比为1∶1。

Different types of reactors combined with ultraviolet （UV） and ozone （03） were used to treat brown oxidation wastewater to find out the optimal process to dissociate the complexes and degrade the organics in it. The results show that the treatment of brown oxidation wastewater by submerged UV~）3 reactor exhibits the best decomplexation effect of complexes. In terms of the degradation effect of organics, submerged UV-O3 reactor decreases the COD from 12 357 mg/L to 6 730 mg/L within 6 h, which is slightly worse than the UV-O3 reactor with non-submerged lamp but better than the reactor using ultraviolet and ozone individually. The optimal process parameters for brown oxidation wastewater treatment in submerged UV-O3 reactor are as follows： load ratio of TiOa to activated carbon （AC） in photocatalyst 3 mg/g, load ratio of MnOx to AC in O3 catalyst 5 mg/g, and mass fraction ofphotocatalyst to AC 1：1.