| 化学沉淀法处理高浓度氨氮废水的试验研究 |
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| 引用本文： | 吴立,孙力平,李志伟,陈轶.化学沉淀法处理高浓度氨氮废水的试验研究[J].四川环境,2009,28(1):24-26. |
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| 作者姓名： | 吴立 孙力平 李志伟 陈轶 |
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| 作者单位： | 天津城市建设学院环境与市政工程系,天津,300384 |
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| 摘 要： | 实验采用磷酸氨镁沉淀法（MAP法）去除垃圾渗滤液中的高浓度氨氮。通过对MgCl2＋Na2HPO4^-、MgSO4＋Na2HPO4、MgO＋Na2HPO4、MgCl2＋NaH2PO4、MgSO4＋NaH2PO4和MgO＋NaH2PO4等六种组合药剂去除氨氮效果的分析比较，得出MgCl2＋Na2HPO4对氨氮的去除效果最好。继而对该组合药剂去除氨氮的影响因素进行了优化。结果表明：pH为9．0，反应时1．3为50min，n（Mg^2＋）：n（NH4^＋）：n（PO4^3-）为1．2：1：0．9时，氨氮可由原来的2100mg／L降低到317mg／L，去除率达84．9％．
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| 关 键 词： | 氨氮 垃圾渗滤液 鸟粪石 |
Study on Treatment of wastewater with High Concentration of ammonia-nitrogen Adopting Chemical Precipitation |
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| WU Li,SUN Li-ping,LI Zhi-wei,CHEN Yi.Study on Treatment of wastewater with High Concentration of ammonia-nitrogen Adopting Chemical Precipitation[J].Sichuan Environment,2009,28(1):24-26. |
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| Authors: | WU Li SUN Li-ping LI Zhi-wei CHEN Yi |
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| Institution: | (Department of Municipal ＆ Environmental Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China) |
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| Abstract: | In this study the Magnesium Ammonium Phosphate Process （MAP） was adopted to remove the ammonia-nitrogen of landfill leachate. Based on the precipitation experiments with different combination of chemicals containing elements of magnesium and phosphate including MgCl2＋Na2HPO4^-、MgSO4＋Na2HPO4、MgO＋Na2HPO4、MgCl2＋NaH2PO4、MgSO4＋NaH2PO4 and MgO＋NaH2PO4, comparison of the ammonia-nitrogen removal effect was analyzed. The result indicated that MgCl2 ＋ Na2HPO4 had the best removal effect. Then the main factors affecting the effect of ammonia-nitrogen removal was optimized. The results indicated that at conditions ofpH9.0, reaction time lasting 50 min and n （Mg^2＋） ：n （NH4^＋） ：n （PO4^3-） = 1.2： 1：0.9, the ammonia nitrogen was reduced from 2100 to 317mg/L with removal rate up to 84. 9% . |
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| Keywords: | Ammonia-nitrogen landfill leaehate magnesium ammonium phosphate |
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