化学沉淀法处理高浓度氨氮废水的试验研究.doc

文档介绍：化学沉淀法处理高浓度氨氮废水的试验研究
吴立孙力平李志伟陈轶
(天津城市建设学院环境与市政工程系,天津 300384)
摘要:实验采用磷酸氨镁沉淀法(MAP法) MgCl2+Na2HPO4、MgSO4+
Na2HPO4、MgO+ Na2HPO4、MgCl2+NaH2PO4、MgSO4+ NaH2PO4 和 MgO+ NaH2PO4 等六种组合药剂去除
氨氮效果的分析比较,得出 MgCl2+Na2HPO4
:pH 为 ,反应时间为 50min,n(Mg2+):n(NH4+):n(PO43-)为 :1: 时,氨氮可由原来的
2100mg/L 降低到 317mg/L,去除率达 %.
关键词: 氨氮; 垃圾渗滤液; 鸟粪石
Experimental Research on the Treatment for Ammonia-nitrogen of wastewater by
chemical sedimentation
Wu Li
Sun Liping
Li Zhiwei Chen Yi
(Department of Municipal and Environmental Engineering,Tianjin Institute of Urban Construction,Tianjin 300384)
Abstract:To remove the ammonia-nitrogen of landfill leachate, this study use the ammonia
phosphate magnesium precipitation (MAP) deal with the leachate. First of all, campared the effect
with different magnesium and phosphate ,such as MgCl2+Na2HPO4、MgSO4+ Na2HPO4、MgO+
Na2HPO4、MgCl2+NaH2PO4、MgSO4+ NaH2PO4 and MgO+ NaH2PO4. The rusults indicated that
MgCl2+Na2HPO4 was the best precipitation. Then studied the main factors of removing the ammonia
under this way. The rusults indicated that the ammonia nitrogen was reduced from2100mg/L to
317mg/L, and the rate was up to % when the pH value was ,reaction time was 50 min and
n(Mg2+):n(NH4+):n(PO43-) was :1: .
Key words: ammonia-nitrogen; landfill leachate; magnesium ammonium phospha