化学沉淀法处理高浓度氨氮废水的研究  

Study of Treating High Concentration Wastewater of Ammonia-nitrogen with Chemical Precipitation

作　　者：全水清[1] 吴银枝[1] 

机构地区：[1]南昌大学环境科学与工程学院,江西南昌330031

出　　处：《江西科学》2008年第5期794-796,共3页Jiangxi Science

摘　　要：采用Na2HPO4.12H2O和MgSO4.7H2O使NH3-N生成磷酸铵镁的化学沉淀法,考察了药剂投加顺序、pH值、药剂配比对高浓度氨氮废水处理效果的影响。结果表明:药剂投加顺序对处理效果没有明显影响;在pH值为9,反应时间为20 min,n(NH4++):n(Mg2+):n(PO43-)=1:1.02:1时,氨氮去除率可达99.28%,为后续处理创造了条件。Chemical precipitation is an effective method for treating ammonia nitrogen wastewater. A lab -scale study was conducted to precipitate the ammonia in the form of magnesium ammonium phosphate by applying such chemicals as Na2HPO4·12H2O and MgSO4·7H2O. Results showed that the removal efficiency of NH3-N reached 99.28% when the optimal pH. Precipitation time and n（NH^＋4 ＋）：n（Mg^2＋）：n（PO^3-4）were 9.20min and 1 ： 1.02 ： 1 respectively.

关 键 词：化学沉淀 氨氮 磷酸铵镁 

分 类 号：X703[环境科学与工程—环境工程]