Fe^(2+)/UV催化臭氧-曝气生物滤池降解腈纶废水研究

Degradation of Acrylic Fiber Wastewater by Heterogeneous Catalytic Ozonation-aerated Biological Filter Process

腈纶废水是一种难降解的有毒有机废水。本文采用Fe2+/UV催化臭氧-曝气生物滤池降解腈纶废水,探讨了臭氧浓度和紫外光辐射强度等影响因素对腈纶废水的COD去除效果的影响,并考察了紫外催化臭氧氧化单元和曝气生物滤池单元对COD去除的协同作用。结果表明,臭氧浓度对COD的去除率影响较大,臭氧浓度下降25%时,臭氧催化氧化和曝气生物滤池单元处理的COD去除率分别下降了12.53%和15.98%。紫外光强度对臭氧催化氧化单元的COD去除率影响较小,但对曝气生物滤池单元影响较大。臭氧催化氧化单元和曝气生物滤池单元COD去除率之比为1∶2,其协同作用使总出水COD值稳定在较低水平。

Catalytic ozone oxidization pretreatment coupled with strengthening activity micro aeration were used to treat acrylic fiber wastewater. The effects of ozone content and ultraviolet radiation intensity on the removal efficiency of acrylic fiber wastewater were discussed. The results showed that ozone concentration has great influence on COD removal rate. When the amount of ozone is decreased by 25% , the COD removal rate of ozonation and aerated biological filter cell are decreased by 12.53% and 15.98% , respectively. On the other hand, ultraviolet light intensity has little effect on heterogeneous catalytic ozonation cell for the COD removal, but dramatically influences the efficiency of the aerated biological filter cell. The COD removal rate of the two cells is 1 ： 2. The total effluent COD value can be kept at a lower level by the dual effect of two cells.