缺氧-好氧膜生物反应器处理高浓度氨氮废水

Anoxic/aerobic membrane bioreactor for high-loading ammonia nitrogen wastewater treatment

采用前置缺氧／好氧膜生物反应器处理高浓度氨氮废水，对反应器的硝化和反硝化性能以及污泥特性进行了研究．研究结果表明：适宜的pH、DO、T下，在容积负荷1．5kgNH4^＋-N／（m^3·d）以下时，出水平均NH4^＋-N值在1mg／L左右，硝化率保持在99％以上；在容积负荷为1．0kgNH4^＋-N／（m^3·d），C／N为3．2，回流比为3时，硝化率为99％，总氮去除率达到83．34％．缺氧池与好氧池的污泥浓度后期分别稳定在6.5～7．0g／L和9．5～10．0g／L，两池污泥VSS／SS长期稳定在89％左右，说明污泥没有无机成分的积累。

Anoxic/aerobic membrane bioreactor was used to treat high - loading ammonia nitrogen wastewater. The nitrification and denitrification performance and the sludge characteristic property were studied. The experimental results showed that the removal rate of NH4 ＋ - N was over 99 % and the average effluent NH4 ＋ - N was 1 mg/L when pH, DO and T were maintained appropriately and the NH4 ＋ - N volumetric loading rate were maintained under 1.5 kg NH4 ＋ -N/（m3·d）. When volumetric loading rate, C/N, return flow ratio was 1.0 kg NH4 ＋ -N/（m3·d） ,3.2 and 3, the removal rate of NH4 ＋ - N and total nitrogen were 99%, 83.34% respectively. The MLSS in the anoxic and oxic reactor stabilized at 6.5 --7.0 g/L and 9.5 -- 10.0 g/L respectively. The VSS/SS of both stabilized at 89%, it proved that there is no inorganic component accumulation in MLSS.