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针对乙二醇生产废水成分复杂,高有机物、高氨氮、高含盐量,处理难度大等特点,采用“微电解—MABR—A/O—高级氧化—混凝沉淀—BAF”组合工艺对其进行中试处理,取得了较佳的处理效果。在进水水质波动较大的情况下,MABR系统仍能达到较好的处理效果,对COD和NH_3-N的去除率分别可达到85%、83%;组合工艺运行稳定,在进水COD和NH_3-N浓度分别为5 000~40 000、450~1 800 mg/L时,最终出水COD≤35 mg/L、NH_3-N≤4 mg/L,主要指标达到了河南省《省辖海河流域水污染物排放标准》(DB 41/777—2013)的要求。
In view of the complex composition of ethylene glycol wastewater, high organic matter, high ammonia nitrogen, high salt content, difficult to handle and so on, using “micro-electrolysis -MABR-A / O-advanced oxidation - coagulation precipitation - BAF ” combination process Its pilot test, and achieved a better treatment effect. The MABR system can still achieve better treatment effect with 85% and 83% removal rate of COD and NH_3-N, respectively, under the condition of fluctuating influent water quality. The combined process is stable, When the concentrations of NH_3-N were from 5 000 to 40 000 and 450 to 1 800 mg / L, respectively, the final effluent COD was less than 35 mg / L and NH_3-N≤4 mg / L. The main indicators reached the “provincial jurisdiction of Haihe River Basin Water Pollutant Discharge Standard ”(DB 41 / 777-2013).