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

doi:10.11894/1005-829x.2008.28(8).45

INDUSTRIAL WATER TREATMENT ›› 2008, Vol. 28 ›› Issue (8): 45-49. doi: 10.11894/1005-829x.2008.28(8).45

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

Liu Xiaoyan, Zheng Leping

Department of Environmental Science and Engineering, Shanghai University, Shanghai 200072, China

Received:2008-04-29 Revised:2008-04-29 Online:2008-08-20 Published:2010-10-01

磷酸铵镁法处理高浓度氨氮废水的研究

刘小燕, 郑乐平

上海大学环境科学与工程系, 上海 200072

作者简介:刘小燕(1982- )，上海大学环境科学与工程系，主要从事水污染控制方面的研究。电话:13774240554，E-mail:Kxxxliu@163.com。通讯作者：郑乐平(1966- )，教授。电话：13321970310，E-mail：lpzheng@shu.edu.cn。
基金资助:
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)

Abstract

Abstract:

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%.

Key words: magnesium ammonium phosphate, precipitation method, NH₄⁺-N wastewater

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%。

关键词: 磷酸铵镁, 沉淀法, 氨氮废水

CLC Number:

X703.1

Liu Xiaoyan, Zheng Leping. Research on the treatment of highly concentrated NH₄⁺-N wastewater by magnes ium ammonium phosphate precipitation[J]. INDUSTRIAL WATER TREATMENT, 2008, 28(8): 45-49.

刘小燕, 郑乐平. 磷酸铵镁法处理高浓度氨氮废水的研究[J]. 工业水处理, 2008, 28(8): 45-49.

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

磷酸铵镁法处理高浓度氨氮废水的研究

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