磷酸铵镁法处理高浓度氨氮废水的研究  

Research on the treatment of highly concentrated NH4+-N wastewater by magnesium ammonium phosphate precipitation

作　　者：刘小燕[1] 郑乐平[1] 

机构地区：[1]上海大学环境科学与工程系,上海200072

出　　处：《工业水处理》2008年第8期45-49,共5页Industrial Water Treatment

基　　金：国家自然科学基金项目(40573063);国家重点基础研究发展计划项目(2008CB418201)

摘　　要：研究采用磷酸铵镁沉淀法,以MgO和Na2HPO4·12H2O为沉淀剂对4028mg/L的模拟高浓度氨氮废水进行处理,考察了pH和药剂配比对磷酸铵镁法沉淀效率的影响,获得磷酸铵镁法对高浓度氨氮废水的最佳处理条件为pH=9.5、MgO与Na2HPO4·12H2O药剂以及废水中氨氮物质的量比〔n(Mg)∶n(P)∶n(N)〕为2.4∶0.95∶1。在最佳条件下,利用磷酸铵镁法对模拟高浓度氨氮废水中的氨氮去除率为93.6%,对实际工业废水中的氨氮去除率为90%。MAP precipitation has been studied by using MgO and Na2HPO4· 12H2O as precipitators for treating 4 028 mg/L of simulated highly concentrated NH4^＋-N wastewater. The effect of pH and precipitator ratio on MAP precipitation efficiency has been investigated. The obtained optimum treatment conditions of MAP precipitation for treating highly concentrated NH4^＋-N wastewater are as follows： pH=9.5, the molar ratio of MgO, Na2HPO4· 12H2O and NH4^＋-N in wastewater, i.e. n （Mg）：n （P） ：n （N）, is 2.4：0.95：1. Under these conditions, the ammonium-nitrogen removal rate, by using MAP precipitation for treating simulated highly concentrated NH4^＋-N wastewater, is 93.6%. The actual removal rate in production is 90%.

关 键 词：磷酸铵镁 沉淀法 氨氮废水 

分 类 号：X703.1[环境科学与工程—环境工程]