生物膜法在去除城市地表水中氨氮的应用研究

针对受污染的城市地表水,采用新型蜂窝陶瓷载体气升式内循环反应器(IAL-CHS)对其中的氨氮去除进行研究。结果表明,该生物膜反应器能有效地去除地表水中的氨氮。研究中主要考查了HRT与NH4+-N去除率之间的关系,并确定了最佳HRT。在HRT为50min,接触反应时间仅为24min条件下,对NH4+-N、NO2--N的去除率分别为82.8%～95.8%、26.1%～60.3%,此反应器能承受较强的冲击负荷,具有很广阔的应用前景。

Ammonia Nitrogen Removal in Urban Surface Water by Biofilm

Internal airlift loop with cells immobilized onto ceramic honeycomb support(IAL-CHS)reactor was used for ammonia nitrogen removal aiming at polluted urban surface water,and results showed that ammonia nitrogen in the water could be removed effectively.Influence of hydraulic resident time(HRT)on NH4+-N removal efficiency was studied,and best HRT was determined,with removal efficiency of NH4+-N and NO2--N of 82.8%～95.8% and 26.1%～60.3% respectively under HRT of 50min and contact time of 24min.The reactor could bear shock load and has potential application.