Abstract:

Magnesium ammonium phosphate(MAP method)is used for treating landfill leachate containing highly concentrated ammonia nitrogen. Phosphate ions is provided by Na₂HPO₄, MgSO₄, MgCl₂ and MgO are used as magnesium precipitation agents. The seawater has been studied as a new substitute of magnesium precipitation agent. The four kinds of magnesium precipitation agents have effect on ammonia nitrogen removal efficiencies and the residual amount of effluent phosphorus. Furthermore, cost analysis is made and the result shows that MgCl₂ has the best treatment effect, and the seawater, as magnesiumprecipitation agent, also has a certain advantage.

Key words: magnesium ammonium phosphate method, magnesium precipitation agent, sea water

摘要：

采用MAP法处理含有高浓度氨氮的垃圾渗滤液, 磷酸根离子由Na₂HPO₄提供, 镁沉淀剂选用MgSO₄、MgCl₂和MgO, 并将海水作为新型的镁沉淀剂的替代品进行对比实验研究。综合考察与探讨了四种镁沉淀剂对氨氮的去除率、出水磷的残余量的影响, 并对药品进行了成本分析。结果表明MgCl₂的处理效果最好, 而海水作为镁沉淀剂也有一定的优势。

关键词: MAP法, 镁沉淀剂, 海水

CLC Number: 

• X703