化学沉淀法去除养猪场废水中氨氮的试验研究

Ammonia Nitrogen Removing in Piggery Wastewater by Chemical Precipitation

以Na2HPO4和MgSO4为沉淀剂,先用化学沉淀法处理模拟高浓度氨氮废水,通过正交试验确定影响因素大小,然后用化学沉淀法处理养猪场的高浓度氨氮废水,得出最佳工艺条件:在pH值为10.0、n(Mg)∶n(N)=1.2、n(P)∶n(N)=1.02的反应条件下,氨氮去除率达到90%。

Chemical precipitation is applied to treat artificial wastewater with high strength ammonia nitrogen by using Na_(2)HPO_(4) and MgSO_(4).The sequence of factors is determined by orthogonal experiment. Then high strength ammonia nitrogen wastewater from piggery is treated by chemical precipitation. The result is that the removal rate of high strength ammonia nitrogen from piggery wastewater is 90% when the ratio of n(Mg)∶n(N) is controlled at 1.2 and the ratio of n(P):n(N) is controlled at 1.02, with the optimal pH for precipitation about 10.0.