高浓度丙烯酸废水的生物增效处理研究

The study of Bioaugmentation technology in treating high concentration acrylic acid wastewater

考察了水解-MBR-Fenton工艺结合生物增效技术处理高浓度丙烯酸废水的可行性。驯化并分离获取两株降解性能较好的AC1和AC2菌株。在生化系统启动时,投加菌剂较对照的出水COD去除率提高4.6%,启动时间减少5天。对照组耐受进水浓度为7500mg/L左右,投菌组可达到11000mg/L左右。生化出水进行Fenton氧化,投菌组的反应条件是:1L废水按照n(H_2O_2):n(Fe^(2+))=6:1和0.6ml H_2O_2的量进行投加,反应2h,药剂投加量和运行时间均比对照组低。投菌组在此条件下可实现出水COD<60mg/L。

The feasibility of treating wastewater with high concentration of acrylic acid by Hydrolysis-MBR-Fenton process and Bioaugmentation technology was investigated.Two strains of bacteria designated as AC1and AC2were obtained.At the time of biochemical system startup,the COD removal rate of the bioaugmentation group increased by4.6%than the control group,and the startup time can be reduced by5days.The highest tolerance concentration of the control group for acrylic acid wastewater was7500mg/L,and the bioaugmentation group was11000mg/L.Biochemical effluent was treated with Fenton oxidation.Reaction conditions of the bioaugmentation group were as following:[H2O2]=0.6ml/L,n(H2O2):n(Fe2+)=6:1and2h reaction time.The dosage of the drug and running time were lower than those of the control group.At this conditions,the effluent COD of bioaugmentation group was under60mg/L.