高级氧化法预处理毛皮加工工业园区集中废水

Pretreatment of Wastewater from Fur Processing Industrial Park by Two Advanced Oxidation Processes

分别采用臭氧氧化和Fenton氧化两种高级氧化法对毛皮加工工业园区集中废水处理厂的进水进行了预处理,考察了各工艺条件对废水COD去除效果的影响,并比较了两种方法对废水可生化性的改善情况。实验结果表明:在初始废水pH为8、臭氧投加速率为1.2 g/h的最适宜条件下,臭氧氧化法的COD去除率最高达72.7%,废水的可生化性显著提高,废水BOD5/COD由初始的0.06提高至0.12;在,n(Fe^(2+)):月(H_2O_2)=1:10、H_2O_2投加量为1.5 mL/L,、初始废水pH为2.5的最适宜条件下,Fenton氧化的COD去除率最高达33.4%,但废水可生化性不大;经臭氧氧化和Fenton氧化处理后,废水中的不饱和结构物质均得到了有效降解。

The influent of a wastewater treatment plant in fur processing industrial park was pretreated by two advanced oxidation processes of ozonation and Fenton oxidation. The effects of the process conditions on COD removal were studied, and the two processes were compared with each other on improvement of wastewater biodegradability. The experimental results show that： Under the optimum ozonation conditions of initial wastewater pH 8 and ozone dosage 1.2 g/h, the highest COD removal rate is 72.7%, and the wastewater biodegradability is significantly improved with BODJCOD increased from 0.06 to 0.12; Under the optimum Fenton oxidation conditions of n （Fe^2＋） ： n （H2O2）= 1 ： 10, H2O2 dosage 1.5 mL/L and initial wastewater pH 2.5, the highest COD removal rate is 33.4%, but the Fenton process is not helpful for improving biodegradability; After treatment by ozonation process or Fenton oxidation process, the unsaturated compounds in the wastewater are degraded effectively.