多相催化氧化-EGSB组合工艺处理丙烯酸废水研究

Acrylic acid wastewater treatment by combined process of heterogeneous catalytic oxidation-EGSB

针对某化工园区丙烯酸装置废水组分复杂、COD高、难生物降解的特点,采用多相催化氧化-EGSB反应器组合工艺对其进行处理。结果表明,在多相催化氧化单元,当进水pH为6,反应温度为70℃,H2O2与COD的物质的量比为1.2时,COD、色度去除率分别为76%和93%,B/C由0.15增至0.63。多相催化氧化单元出水采用EGSB反应器进行处理,当温度为30~35℃,进水pH为6.0~6.5,HRT为72 h时,该单元的COD、色度去除率分别为93%、67%。经组合工艺处理后,总COD、色度去除率分别为98.0%、97.5%。

Aiming at the characteristics of complex composition,high COD content and difficult biodegradation of wastewater from acrylic acid plant in a chemical industry park,a high efficiency combined process of heterogeneous catalytic oxidation-EGSB reactor was adopted for treatment.The results showed that the removal rates of COD and chroma were 76%and 93%respectively,under the condition of pH 6,reaction temperature 70℃and molar ratio of H2O2 to COD 1.2 in the heterogeneous catalytic oxidation unit,and B/C increased from 0.15 to 0.63.The effluent of heterogeneous catalytic unit was treated by EGSB reactor.Under the conditions of 30-35℃,pH of influent water between 6.0-6.5 and HRT of 72 h,the COD and chroma removal rates of the treatment unit were 93%and 67% respectively.After combined treatment,the removal rates of total COD and chroma were 98.0%and 97.5%respectively.