Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Estimation of the Optimum Factor of the Struvite Crystalization for the Nitrogen and Phosphorus Removal in WWTP

폐수내 질소 및 인 제거를 위한 struvite 결정화 최적조건 도출

  • 김지연 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 문용택 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 서인석 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 김병군 (한국수자원공사 수자원연구원 상하수도연구소)
  • Received : 2007.10.27
  • Accepted : 2007.11.26
  • Published : 2007.12.15
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초록

By struvite and hydroxyapatite crystallization, was high concentration of nitrogen and phosphorus in wastewater simultaneously. Particularly, removal of nitrogen and phosphate for crystallization have been applied to landfill leachates and animal wastewater. The purpose of this study is to decide the optimum struvite crystallization factors, sequence of $Mg^{2+}$ addition, pH control and the molar ratio of $Mg^{2+}$ over $PO_4^{3-}$. In conclusion, dosage of the magnesium followed by pH control formed magnesium hydroxide, so pH was decreased. Therefore, pH adjustment should followed by after magnesium dosage and then pH should be adjusted to 11. Over pH 10, it was not good for struvite crystallization efficiency by side reaction. Following of the $Mg^{2+}$ and the $PO_4^{3-}$ are dosed excessively, the removal efficiency of the $NH_4^+$ increased. A molar ratio of $Mg^{2+}:NH_4^+:PO_4^{3-}$, 1.3:1:1.3 was the most on effective for $NH_4^+$ removal at pH 9.5. But for the perfect removal $NH_4^+$, it is thought to be that molar ratio should be 2:1:2.

키워드

참고문헌

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