膜生物反应器处理高氨氮废水

Membrane Bio-Reactor for High-Loading Ammonia Wastewater Treatment

试验采用MBR处理高氨氮废水,重点分析了氨氮、有机物的去除以及膜比通量变化等。结果表明,工艺运行稳定,出水氨氮平均浓度低于3mg/L,MBR能够抵抗有机物冲击负荷,氨氮容积负荷可以达到1.11kgNH3-N/(m3·d)。在整个运行期间膜比通量下降比较缓慢,分析认为是高曝气量、低碳氮比以及自养菌的优势生长起了主要作用。

MBR was used to treat highloading ammonia nitrogen wastewater. Emphases were put on the ammonia nitrogen removal, the organics removal and the changes of membrane specific flux. The results showed that the reactor had stable runing, and NH3N in effluent was lower than 3mg/L on an average. MBR held an ability to resist organic shock loading. The NH3N volumetric load was 1.11kg/(m3·d). During the operation period, the decline rate of membrane specific flux was much lower and it was considered that high density of aeration, low C/N ratio and dominant growth of autotrophic bacteria were the main contributors to this phenomenon.