催化臭氧氧化—好氧生化—膜分离组合工艺处理砷化镓生产废水的工程应用

为了解决砷化镓生产废水含有磷酸盐、氟化物、砷化物以及难沉降亚微米级悬浮物的处理难点,首先采用催化臭氧氧化—好氧生化深度预处理废水,再采用RO膜分离工艺进行处理。结果表明：催化臭氧氧化法使废水中亚微米级悬浮物脱稳,有利于悬浮物的混凝沉降,并优化了膜分离阶段的分离环境,可延长膜使用寿命,降低运行成本;经过膜分离后,出水砷质量浓度为0.01 mg/L,氟质量浓度为1.0 mg/L,COD、TP、TN和ρ（NH₃-N）为10,0.01,0.50,0.50 mg/L,均达到《地表水环境质量标准》（GB3838—2002）Ⅲ类水质标准。

Engineering application of catalytic ozonation-aerobic biochemical degradation-membrane separation combined process for treatment of gallium arsenide production wastewater

In order to solve the treatment difficulties of the gallium arsenide production wastewater containing phosphate,fluoride,arsenide and submicron suspended solids which are difficult to settle,the wastewater was firstly pretreated by catalytic ozonation-aerobic biochemical digradation process,and then treated by RO membrane separation process. The experimental results show that：The submicron suspended solids in the wastewater are destabilized by catalytic ozonation,which is conducive to coagulation and sedimentation of suspended solids;At the same time,the separation environment of membrane separation stage is optimized,which can prolong the service life of membrane and reduce the operation cost;After membrane separation,the mass concentration of arsenic and fluorine in the effluent is 0.01 mg/L and 1.0 mg/L,and COD,TP,TN and ρ（NH₃-N） are 10,0.01,0.50,0.50 mg/L,respectively,which meet the class Ⅲ water quality standard of environmental quality standard for surface water （GB 3838-2002）.