催化氧化-电解氧化预处理环氧树脂混合废水

采用催化氧化-电解氧化联合技术对某企业环氧树脂混合废水进行预处理,以提高其可生化性能。结果表明,以磁性活性炭为催化剂,采用催化氧化法处理废水,当pH为11,气体体积流量和催化剂添加量分别为60 L/h和6 g/L,反应时间3 h后COD的去除率达到28%左右,BOD5/COD提高到0.30;对催化氧化出水进一步采用电解氧化法处理,不额外添加电解质,调节pH为11,电流密度60 m A/cm^2,电极间距4 cm,反应时间3 h,COD的去除率为50%左右,BOD5/COD提高到0.42,为后续的生化处理减轻负荷。处理后,组分物质共轭双键转化为饱和烷烃结构,水中的酚类和脂类物质得到有效降解,从而提高了其可生化性。

Pretreatment of Epoxy Resin Mixed Wastewater by Catalytic Oxidation-Electrolytic Oxidation

The combined technology of catalytic oxidation and electrolytic oxidation was used to pretreat the epoxy resin mixed wastewater of an enterprise to improve its biodegradability.The results showed that when the wastewater was treated by catalytic oxidation with magnetic activated carbon as catalyst and the pH was 11,gas flow rate and catalyst addition were 60 L/h and 6 g/L,respectively,and reaction time was 3 h,the removal rate of COD was about28%and BOD5/COD was increased to 0.30.Then,the catalytic oxidation effluent was further treated by electrolytic oxidation without additional electrolyte,when the pH was adjusted to 11,the current density was 60 mA/cm^2,the electrode spacing was 4 cm and the reaction time was 3 h,the COD removal rate was about 50%and the BOD5/COD was increased to 0.42,which reduced the load for subsequent biochemical treatment.After treatment,the conjugated double bond of the component substance was converted into a saturated alkane structure,and the phenolic and lipid substances in the water were effectively degraded,thereby improving the biodegradability.