摘要：

针对深圳某企业微生物发酵类制药废水高氨氮、高总氮、低碳氮比等特点，采用两级AO/MBR-絮凝沉淀-反硝化滤池工艺对其进行处理，设计处理规模为1.6 m³/h，日运行8 h。将浓污水与清污水混合均匀后作为进水，工程经调试后稳定运行，在进水COD、氨氮、总氮、总磷平均分别为200、120、180、18 mg/L条件下，出水COD、氨氮、总氮、总磷平均分别为23、0.5、18、0.2 mg/L，水质稳定，满足排放要求。运行效果分析表明，两级好氧池的组合填料有效强化了对氨氮的去除，使得两级AO/MBR工艺去除了99.58%的氨氮；两级AO/MBR与反硝化滤池的组合工艺可去除90.00%的总氮。技术经济分析表明，该工程运行成本合计约为31.14元/m³，其中，与总氮去除紧密相关的碳源消耗费用和污泥处置费用共计约15.55元/m³。

关键词: 发酵制药废水, 低碳氮比, 两级A/O, 反硝化滤池

Abstract:

In response to the characteristics of high ammonia-nitrogen, high tatal nitrogen, and low carbon to nitrogen ratio in the fermentation pharmaceutical wastewater of a enterprise in Shenzhen, the process of two-stage AO/MBR-flocculation sedimentation-denitrification filter was adopted, with a designed treatment capacity of 1.6 m³/h and a daily operation of 8 hours. Concentrated sewage and clean sewage were mixed evenly to be used as the inlet water. After testing, the project ran stably. Under the conditions of average inlet COD, ammonia-nitrogen, total nitrogen, and total phosphorus as 200, 120, 180, and 18 mg/L, respectively, the effluent COD, ammonia-nitrogen, total nitrogen, and total phosphorus were 23, 0.5, 18, and 0.2 mg/L, respectively. The water quality was stable and met the discharge requirements. The analysis of operational effectiveness showed that the combination packing of two-stage aerobic tanks effectively enhanced the removal of ammonia-nitrogen, resulting in 99.58% removal of ammonia-nitrogen by the two-stage AO/MBR process. The combination process of two-stage AO/MBR and denitrification filter could remove 90.00% of total nitrogen. Technical-economic analysis showed that the total operating cost of the project was about 31.14 yuan/m³, of which the carbon source consumption fee and sludge disposal fee closely related to total nitrogen removal were about 15.55 yuan/m³.

Key words: fermentation pharmaceutical wastewater, low C/N, two-stage AO, denitrification filter

中图分类号: 

• X703