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化学沉淀法去除垃圾渗滤液中的氨氮
引用本文:赵庆良,李湘中.化学沉淀法去除垃圾渗滤液中的氨氮[J].环境科学,1999,20(5):90-92.
作者姓名:赵庆良  李湘中
作者单位:[1]哈尔滨建筑大学市政环境工程学院 [2]香港理工大学土木与结构工程系
摘    要:为了有效地去除垃圾渗滤液中高浓度的NH^+4-N而避免传统吹脱法造成吹脱塔内碳酸盐结垢问题,探讨了采用化学药剂诸加MgCl2·6H2O和Na2HPO4·12H2O或MgO和H3PO4使NH^+4-N生成磷酸铵镁的化学沉淀去除法。小试研究结果表明,当垃圾渗滤液中投加MgCl2·6H2O和Na2HPO4·12H2O而使Mg^2+:NH^+4:PO^3-4的比例为1:1:1时,在最佳pH为8.5~9.0

关 键 词:垃圾渗滤液  氨氮  沉淀  磷酸铵镁  化学沉淀法
收稿时间:1998/10/17 0:00:00

Ammonianitrogen Removal from Landfill Leachate by Chemical Precipitation
Zhao Qingliang and Li Xiangzhong.Ammonianitrogen Removal from Landfill Leachate by Chemical Precipitation[J].Chinese Journal of Environmental Science,1999,20(5):90-92.
Authors:Zhao Qingliang and Li Xiangzhong
Institution:School of Municipal & Environ. Eng., Harbin University of Civil Engineering & Architecture, Harbin 150090, China;Department of Civil & Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Abstract:To remove efficiently high strength of ammonianitrogen from landfill leachate and to avoid carbonate scaling problems in a conventional airstripping tower,alabscale study was conducted to precipitate the ammonia in the form of magnesium ammomum phosphate by applying such chemicals as MgCl26H2O and Na2HPO412H2O or MgO and 85% H3PO4 with different stoichiometric ratios.The experimental results demonstrated that NH+4N was effectively removed from initial 5618mg/L down to final 65mg/L when the ratio of Mg2+NH+4PO3-4 was controlled at 111 by using analytical grade chemicals of MgCl26H2O and Na2HPO412H2O,with the optimal pH for the precipitation about 8590.The other two chemicals of MgO and 85% H3PO4 were also tested and found to be not as efficient as MgCl26H2O and Na2HPO412H2O to precipitate NH+4N,which removed NH+4N from initial 5404mg/L only down to final 1688mg/L at the same experimental conditions.
Keywords:landfill leachate  ammonianitrogen  precipitation  magnesium ammonium phosphate    
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