微电解—EGSB—生物增浓工艺处理聚酯废水试验研究

为了有效去除难降解有机物,采用由微电解、EGSB、生物增浓等单元组成的复合工艺处理聚酯废水,分析了处理效果与主要工艺参数。结果表明:在填料填充率为80%、气水比为3、反应时间大于1 h条件下,微电解预处理工艺对COD去除率大于40%,B/C可提升至0.34;在水力停留时间(HRT)为12 h,上升流速为3.2 m/h的条件下,EGSB对COD平均去除率为62.9%;在填料填充率为40%、HRT=9.5 h的条件下,好氧生物增浓反应器的微生物浓度大于9 g/L,出水COD平均值为229 mg/L。

Study on the treatment of polyester wastewater by microelectrolysis-EGSB-bioconcentration process

In order to remove refractory organic matter effectively,a combined process consisting of micro-electrolysis,EGSB,bioconcentration and other units was used to treat polyester wastewater.The treatment effect and main process parameters were analyzed.The results show that under the conditions that the filling rate of the filler is 80%,the gas-water ratio is 3,and the reaction time is greater than 1 h,the removal rate of COD by the micro-electrolysis pretreatment process is greater than 40%,and the B/C is increased to 0.34.The removal rate of COD by EGSB is 62.9%when the hydraulic retention time(HRT)is 12 h and rising velocity is 3.2 m/h.The microorganism concentration in the aerobic bioconcentration reactor is greater than 9 g/L,and the average concentration of effluent COD is 229 mg/L,when filling rate is 40%and HRT is 9.5 h.