| 鸟粪石结晶法回收氨氮影响因素的研究 |
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| 引用本文： | 曾庆玲,沈春花.鸟粪石结晶法回收氨氮影响因素的研究[J].环境科学与技术,2012,35(1):80-83,98. |
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| 作者姓名： | 曾庆玲 沈春花 |
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| 作者单位： | 华侨大学土木工程学院,福建厦门,361021 |
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| 基金项目： | 福建省自然科学基金，华侨大学基本科研业务费专项基金，华侨大学"侨办"科研基金，华侨大学科研启动费资助项目 |
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| 摘 要： | 为了预处理化工厂的高氨氮废水,采用向废水中投加Na2HPO.412H2O和MgCl.26H2O生成磷酸铵镁(鸟粪石)的方法,以去除其中的高浓度氨氮同时获得缓释肥鸟粪石。试验以模拟氨氮废水为研究对象,研究了鸟粪石结晶法回收氨氮的影响因素:反应时间、氨氮初始浓度、pH值、磷酸盐与镁盐投加量对高氨氮废水的去除效果,然后进行不同影响因素的试验,确定了氨氮去除的最佳工艺条件。研究结果表明,鸟粪石结晶法回收氨氮的最佳工艺条件为:反应时间10 min,pH值为9,NH4-N:PO4-P:Mg摩尔比为1:1.05:1.15,NH4-N、PO4-P与Mg的去除率分别为91.52%、99.58%与90.52%;残余浓度分别为90.87、4.96与174.1 mg/L,加入的磷几乎全部回收,无二次污染。预处理的废水进入污水处理厂进一步深度处理。
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| 关 键 词： | 鸟粪石 去除率 氨氮 磷 镁 |
Experimental Study on Recovery of Ammonia-nitrogen by Struvite Precipitation Method |
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| ZENG Qing-ling
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SHEN Chun-hua.Experimental Study on Recovery of Ammonia-nitrogen by Struvite Precipitation Method[J].Environmental Science and Technology,2012,35(1):80-83,98. |
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| Authors: | ZENG Qing-ling SHEN Chun-hua |
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| Institution: | (College of Civil Engineering,Huaqiao University,Xiamen 361021,China) |
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| Abstract: | A bench scale study was conducted to pre-treat high strength ammonia-nitrogen wastewater with the method of struvite precipitation,the process of which is described such as application of Na2HPO4·12H2O and MgCl2·6H2O into the wastewater and followed by adjusting pH and stirring at a moderate speed,thus allowing struvite to precipitate out.The optimum condition of struvite precipitation resulted from the experiment was described as well. |
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| Keywords: | struvite removal rate ammonia-nitrogen phosphate magnesium |
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