Abstract:

On the basis of treating highly concentrated ammonia-nitrogen wastewater by chemical precipitation process， activated clay， activated zeolite and activated coal ash have been chosen as crystal seeds. Then， the effects of ammonia-nitrogen removal rate， particle type， particle diameter and component are analyzed. The results show that adding crystal seed can improved ammonia-nitrogen removal rate obviously， but does not have much effect on the formation of big particle diameter.

Key words: crystallization-combined, chemical precipitation process, ammonia-nitrogen wastewater

摘要：

在化学沉淀法处理高浓度氨氮废水的基础上,选择活化后的黏土、沸石和粉煤灰作为晶种投加到反应器中,然后从氨氮的去除率、生成晶体的粒型、粒径和组成4个方面分析不同晶种的影响。从而得出结论:投加晶种可明显提高氨氮的去除率,但对形成大粒径晶体的影响不大。

关键词: 晶析辅助, 化学沉淀法, 氨氮废水

CLC Number: 

• X703.1