磷酸镁铵沉淀沉淀(MAP)法处理氨氮废水影响因素分析

Magnesium ammonium phosphate precipitation(MAP) method in the treatment of ammonia nitrogen wastewater analysis of influence factors

磷酸镁铵是通过向氨氮废水中加入镁盐和磷酸盐,使Mg2+、PO43-离子的药剂与氨氮废水中的NH4+发生化学反应后生成磷酸镁铵(MgNH4PO4·6H2O),再通过重力沉淀或过滤得到MAP。但在整个反应过程中要受到pH值、反应时间、反应物配比等等因素影响。综合分析:pH值在9左右,温度在25℃-30℃,反应物配比值因氨氮废水产生的污染源不同而不同。

Magnesium ammonium phosphate by adding magnesium salt and phosphate to ammonia nitrogen in wastewater, The medica- ment and ammonia nitrogen wastewater Mg2＋ , PO43- ions in NH4 ＋ after chemical reaction of producing magnesium ammonium phosphate （ MgNH4PO4 · 6H20） ,Then MAP was obtained by gravity sedimentation or filtration. But in the whole reaction process is influenced by pH value, reaction time, reactant ratio etc.. Comprehensive analysis ： at pH value of 9, the temperature at 25℃ - 30℃, pollution source re- actant ratio of ammonia nitrogen wastewater produced by different.