吗啉废水的生化处理工艺

以含有吗啉、甲基吗啉的高浓度有机废水为研究对象，提出了曝气吹脱-吸附-生物处理的联合工艺，并在室内进行了小试实验。结果表明：原废水经过2次曝气吹脱后，ρ(NH₃-N)从62 500 mg/L降为431 mg/L，ρ(COD)从50 840 mg/L降为26 051 mg/L。通过吸附实验，ρ(COD)从26 051 mg/L降为2 769 mg/L，ρ(NH₃-N)从412 mg/L降为134 mg/L。在生物处理室内小试实验中，采用了活性污泥反应器与曝气生物滤池相结合的处理工艺。在活性污泥反应系统中，当废水pH为7.5、ρ(DO)为4.3 mg/L、水力停留时间为30 h时，COD的去除率最高，可以达到83.1%。在曝气生物滤池中，当ρ(DO)为3.3 mg/L时，COD去除率最高，达到55.8%。在生物处理的最佳参数条件下进行连续监测，当进水ρ(COD)为2 769 mg/L、出水ρ(COD)平均值为387 mg/L时，COD去除率可达到85.9%。吗啉废水经过此联合工艺的处理，ρ(COD)从50 840 mg/L降为387 mg/L。

Research on Biochemical Treatment Process of Morpholine Wastewater

The combined aerated stripping-adsorption-biological process was used to deal with the high concentration morpholine and N-methylmorpholine organic wastewater in laboratory scale. The results were as follows: after twice aerated stripping, the ammonia nitrogen concentration of the raw wastewater was reduced from 62 500 mg/L to 431 mg/L, meanwhile COD was reduced from 50 840 mg/L to 26 051 mg/L. After the adsorption by activated carbon, COD was reduced from 26 051 mg/L to 2 769 mg/L and the concentration of ammonia nitrogen was reduced from 412 mg/L to 134 mg/L. In the biological treatment process, the combined process of activated sludge reactor and biological aerated filter (BAF) was used. In the activated sludge reactor system, when influent pH was 7.5, DO was 4.3 mg/L and hydraulic retention time (HRT) was 30 h, COD removal rate reached 83.1%. In the BAF process, when DO was 3.3 mg/L, COD removal rate reached 55.8%.Continuous monitoring of the biological process was made in the optimum conditions, when influent COD was 2 769 mg/L, the average effluent COD was 387 mg/L, the removal rate reached 85.9%.The effluent COD of the morpholine containing wastewater was reduced to 387 mg/L from 50 840 mg/L through this combined treatment process.