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Wu Yangyu, Peng Xiaochun, Chen Zhiliang, Dong Jiahua, Zhou Shaoqi. Treatment of low concentration ammonium nitrogen in landfill leachate with MAP precipitation[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 925-930.
Citation: Wu Yangyu, Peng Xiaochun, Chen Zhiliang, Dong Jiahua, Zhou Shaoqi. Treatment of low concentration ammonium nitrogen in landfill leachate with MAP precipitation[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 925-930.
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Treatment of low concentration ammonium nitrogen in landfill leachate with MAP precipitation

  • 1.

    South China Institute of Environmental Science, MEP, Guangzhou 510655, China

  • 2.

    College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China

  • Received Date: 09/11/2011
    Accepted Date: 13/09/2011
    Available Online: 18/03/2013
    Fund Project:
  • The effects of solution pH value, stirring time, Mg∶N, and N∶P molar ratios on removals of low ammonium nitrogen concentration were investigated using struvite precipitation. A quadratic statistical modeling was applied to investigate the improvement availability for high-level removal of ammonium-nitrogen. The three-level-four-variable central composite design (CCD) was proposed by Design Expert Software (version 7.1.3). The fit summary suggested that the quadratic models were the most appropriate one among all of the polynomial models to simulate NH4-N removal and remaining PO43--P concentration. Under optimum conditions of pH 10, Mg∶N molar ratio of 1.41, N∶P molar ratio of 1.34, the highest NH4-N removal 71.2% was achieved and nearly no PO43--P left in the treated leachate. The treated effluent met the new discharge standards of China. The XRD pattern indicated that the main precipitated crystal was struvite.
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Treatment of low concentration ammonium nitrogen in landfill leachate with MAP precipitation

  • Received Date: 09/11/2011
  • Accepted Date: 13/09/2011
  • Available Online: 18/03/2013
Fund Project:

Abstract: The effects of solution pH value, stirring time, Mg∶N, and N∶P molar ratios on removals of low ammonium nitrogen concentration were investigated using struvite precipitation. A quadratic statistical modeling was applied to investigate the improvement availability for high-level removal of ammonium-nitrogen. The three-level-four-variable central composite design (CCD) was proposed by Design Expert Software (version 7.1.3). The fit summary suggested that the quadratic models were the most appropriate one among all of the polynomial models to simulate NH4-N removal and remaining PO43--P concentration. Under optimum conditions of pH 10, Mg∶N molar ratio of 1.41, N∶P molar ratio of 1.34, the highest NH4-N removal 71.2% was achieved and nearly no PO43--P left in the treated leachate. The treated effluent met the new discharge standards of China. The XRD pattern indicated that the main precipitated crystal was struvite.

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