MAP法去除中浓度氨氮废水及产物的回收利用

Treatment for Middle Concentrated Ammonia-nitrogen Wastewater by MAP and Recycling of the Products

本论文研究了不同沉淀剂组合、pH值、沉淀剂的投加量(n(PO4^3-)︰n(NH4^+)、n(Mg^2+)︰n(NH4^+))以及反应搅拌时间对400 mg·L^-1模拟中浓度氨氮废水中氨氮去除率的影响,得到去除氨氮废水最佳条件:对反应生成的沉淀物进行了扫描电镜(SEM)与X射线衍射(X-ray)分析,结果表明,热解处理产物对中浓度氨氮水体中氨氮的去除率高达85%。

The effects of different precipitant combinations,pH value,n(PO43-):n(NH4+)、n(Mg2+):n(NH4+)ratios,stirring time on the removal of ammonia nitrogen in wastewater were investigated.Above on three-level-four-variable orthogonal experiments,the optimal condition of ammonia nitrogen removal was:the concentration of ammonia nitrogen was 400mg·L-1;SEM and XRD analysis were carried out on the precipitation products.The recycling performance of heat treatment products to ammonia nitrogen in wastewater was investigated.The results show that the adsorption efficiency of heat treatment products to ammonia nitrogen in water was as high as 85%.