| MAP沉淀法回收垃圾渗滤液中高浓度氨氮试验研究 |
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| 引用本文： | 宋玮华,尹军,曹俊华,邢志贤,赵可.MAP沉淀法回收垃圾渗滤液中高浓度氨氮试验研究[J].吉林农业大学学报,2012(3):316-320. |
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| 作者姓名： | 宋玮华 尹军 曹俊华 邢志贤 赵可 |
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| 作者单位： | 哈尔滨工业大学市政与环境工程学院;吉林建筑工程学院城建学院;吉林建筑工程学院水污染控制与资源化利用吉林省重点实验室;河北省环境监测中心站 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2008ZX07207-005-05);吉林省教育厅“十一五”科学技术研究项目(2010497);吉林省环保厅科研项目(吉环科字第2009-09号);吉林建筑工程学院青年科技发展基金项目(J20091092) |
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| 摘 要： | 以实际垃圾渗滤液为对象,采用MgSO4.7H2O和Na2HPO4.12H2O使NH3-N生成MgNH4PO4.6H2O结晶沉淀的MAP(硫酸铵镁)法去除回收垃圾渗滤液中高浓度氨氮的效能,研究了pH、反应时间、药剂配比对NH3-N去除率的影响。结果表明:MAP法回收垃圾渗滤液中NH3-N的适宜pH为8.5~9.5;过高的pH会破坏硫酸铵镁晶体结构,导致固定氨从结晶中游离,不利于氨氮的去除;在pH为8.5、反应时间为20 min、n(Mg2+)∶n(NH4+)∶n(PO43-)=1.4∶1.0∶1.4的最佳条件下,渗滤液中NH3-N的质量浓度由初始的1 671 mg/L降至30 mg/L,去除率达98.2%;同时回收的MAP可作缓释肥。
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| 关 键 词： | 垃圾渗滤液 氨氮 硫酸铵镁 |
Recovery of High-Concentration NH3-N in Landfill Leachate by MAP Chemical Precipitation |
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| SONG Wei-hua,YIN Jun,CAO Jun-hua,XING Zhi-xian,ZHAO Ke.Recovery of High-Concentration NH3-N in Landfill Leachate by MAP Chemical Precipitation[J].Journal of Jilin Agricultural University,2012(3):316-320. |
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| Authors: | SONG Wei-hua YIN Jun CAO Jun-hua XING Zhi-xian ZHAO Ke |
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| Institution: | 1.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;2.College of City,Jilin Architectural land Civil Engineering Institute,Changchun 130118,China;3.Jilin Provincial Key Laboratory of Pollution Control and Resource Reuse,Jilin Institute of Architectural and Civil Engineering,Changchun 130118,China;4.Central Station,Hebei Province Environmental Monitoring Center,Shijiazhuang 050037,China |
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| Abstract: | MgNH4PO4·6H2O crystal precipitation was formed to recycle NH3-N in leachate by adding MgSO4·7H2O and Na2HPO4·12H2O.pH value,reaction time and chemical dosage ratio were discussed.The results show that the suitable reaction pH value is between 8.5 and 9.5.When pH value is too high,the crystal structure will be destroyed,making the fixed ammonia escape from MgNH4PO4.n(Mg2+): n(NH4 +):n(PO43-)=1.4∶1.0∶1.4 is the best choice under the conditions of pH 8.5 and reaction time 20 minutes.The concentration of NH3-N in leachate is decreased from 1 671 mg/L to 30 mg/L,and the removal rate reaches 98.2%.The recycled MAP can be used as in multi-element compound fertilizer production. |
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| Keywords: | landfill leachate ammonia nitrogen MAP |
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