改进式曝气生物滤池处理高氨氮废水的研究

Research on high ammonia-nitrogen fertilizer wastewater treatment by modified biological aerated filter in series

针对化肥氨氮废水排放量大、氨氮浓度高、C/N低等特点,通过实验研究探讨了添加高效菌种后采用改进式曝气生物滤池对化肥氨氮废水的处理性能、机理及实用性,并与SBR、普通BAF(Biofor)工艺和未添加高效菌种的改进式曝气生物滤池进行了对比。实验结果表明,添加高效菌种后改进式曝气生物滤池可以将氨氮≤200 mg/L,COD≤150 mg/L的化肥废水有效地处理至氨氮≤5 mg/L,COD≤50 mg/L,同时对总氮去除率达60%以上。

Aiming at large discharging,highly concentrated ammonia-nitrogen and low C/N ratio of fertilizer wastewater,modified BAF with concentrated microorganisms was designed.The processing performance,mechanism and practicability were studied,its performances comparing with SBR,the general BAF（Biofor） and modified BAF without concentrated microorganisms were discussed simultaneously.The results showed that modified BAF could effectively remove ammonia-nitrogen from 200 mg/L to less than 5 mg/L,COD from 150 mg/L to less than 50 mg/L,its removal rate of total nitrogen was more than 60%.