试验研究

MAP法处理焦化废水中氨氮的pH值影响

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  • 1. 湖南大学环境科学与工程系 湖南 长沙410082;
    2. 昆明制药股份有限公司污水处理站 云南 昆明 650100;
    3. 湖南湘牛环保实业有限公司 湖南 长沙 410082
刘大鹏(1976- ),现为湖南大学环境科学与工程系在读研究生。电话:(0731)8822829。E-mail:ufocne@sohu.com。

收稿日期: 2003-04-29

  网络出版日期: 2010-10-01

pH effect on the treatment of ammonia-nitrogen from coke plant wastewater by MAP process

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  • 1. Dept.of Environmental Science&Engineering Hunan University Changsha 410082 China;
    2. Sewage Treatment Station Kunming Pharmacy Co. Ltd. Kunming 650100 China;
    3. Hunan Xiangniu Environmental Protection Co. Ltd. Changsha 410007 China

Received date: 2003-04-29

  Online published: 2010-10-01

摘要

采用化学药剂Na2HPO4·12H2O和MgCl2·6H2O与焦化废水中的高浓度氨氮反应生成磷酸铵镁(MAP),着重探讨了pH值对氨氮去除效果的影响。实验结果表明,在Mg2+,HN4+,PO43-物质的量比为1.3∶1∶0.9,得到最佳pH为8.5~10,原废水中的NH3-N可由2380mg/L降到100mg/L以下,生成的MAP晶体纯度较高,对废水中的有毒、有害物质无吸附,并具有良好的沉降性能。

本文引用格式

刘大鹏, 王继徽, 刘晓澜, 黄稳水, 邹亮, 何丹莉, 蒋谦 . MAP法处理焦化废水中氨氮的pH值影响[J]. 工业水处理, 2004 , 24(1) : 44 -47 . DOI: 10.11894/1005-829x.2004.24(1).44

Abstract

Na2 HPO4·12H2O and MgCl 2·6H 2O react with highly concentrated ammonia-nitrogen from coke plant wastewater,forming magnesium ammonium phosphate(MAP).The effect of pH value on the ammonia-nitrogen removal result isexpolored emphatically.The experimental resultsshow that when the ratio of n(Mg2+)∶ n(NH4+)∶ n(PO43-)iscontrolled at1.3 ∶ 1 ∶ 0.9,the optimal pH isabout8.5to10.The NH 3-N in the original wastewater can be decreased from2380mg /L to lower than100mg /L.The formed MAP crystal hashigh purity.It doesnot adsorb the poisonousand harmful substancesin the wastewater.Furthermore,itssedimentation capability isgood.

参考文献

[1] 尹成龙,单忠键,曾锦之.焦化废水处理存在的问题及其解决对策[J].给水排水,2000,26(6):35-37
[2] Zdybiewska M W,Kula B. Removal of ammonia nitrogen by the precipitation method on the example of some selected waste waters [J]. Wat. Sci. Tech.,1991,24(7) :229-234
[3] Schulze-Rettmer R. The simultaneous chemical precipitation of ammonium and phosphate in the form of magnesium ammonium phosphate[J]. Wat. Sci. Tech.,1991,23(4 ~ 6) :659-667
[4] 杨代菱,等.分析化学[M].第4版.北京:高等教育出版社,2000.150.

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