摘要
本文以人工配制的无机高氨氮废水为处理对象,利用以大孔聚氨酯载体为填料的固定化微生物曝气生物滤池为反应器,研究DO、pH、水力停留时间(HRT)和进水氨氮浓度对反应系统硝化性能的影响,以确定该系统的最佳操作条件。结果表明:进水氨氮的质量浓度从200 mg/L逐步上升到1500 mg/L,其质量浓度的升高对氨氮去除基本没有影响,在DO的质量浓度为4.0 mg/L,pH为7.5,HRT为24h时,系统达到最佳处理效果,出水氨氮的质量浓度低于5.0mg/L.氨氮去除率达到99.5%。
The effects of DO, pH, HRT and influent ammonia concentration on nitrification were investigated in order to determine the optimal conditions for ammonia removal of synthetic wastewater with high strength ammonia in an immobilized microorganism biological aerated filter （G-BAF） system. DO was kept at 0.5, 2.0, 4.0 and 6.0mg/L, pH at 6.5, 7.5, 8.5 and 9.5, HRT at 48, 36, 24, 18, and 12h, the ammonia concentration of influent at 200, 500, 1000, and 1500mg/L, respectively. The results showed that nitrification was steadily obtained and the optimal conditions were DO=4.0mg/L, pH=7.5, and HRT=24h, in the case of ammonia concentration of effluent below 5.0mg/L and ammonia removal rate above 99.5%.
关键词
高氨氮废水
固定化微生物
硝化
影响因素
high-strength ammonia wastewater
G-BAF
nitrification
controlling factors
