• Title/Summary/Keyword: Blended fertilizer

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The Effect of Draw Solution Concentration on Forward Osmosis Desalination Performance Using Blended Fertilizer as Draw Solution (유도용액으로 혼합비료를 사용한 정삼투식 해수담수화에서 담수화 성능에 대한 유도용액 농도의 영향)

  • Jeong, Namjo;Kim, Seung-Geon;Kim, Dong Kook;Lee, Ho-Won
    • Membrane Journal
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    • v.23 no.5
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    • pp.343-351
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    • 2013
  • This study is to investigate the effects of the draw solution concentration on forward osmosis desalination performance using blended fertilizer as draw solution. As the concentration of blended fertilizer solution (draw solution) increased, the water permeate flux increased nearly linearly, but PR (performance ratio) was reduced. Using sea water and deionized water as the feed solution, respectively, at the blended fertilizer solution of 600 g/L $H_2O$, the PR obtained were 5.39 and 6.50, respectively. And as the concentration of blended fertilizer solution increased, the reverse solute flux for nitrogen (N), phosphorus (P), and potassium (K) increased nearly linearly, but specific reverse solute flux for them was reduced. The reverse solute flux and specific reverse solute flux became higher in the order of N > K > P.

Evaluating the Performance of Blended Fertilizer Draw Solution in Reuse of Sewage Water Using Forward Osmosis (정삼투를 이용한 하수의 재이용에서 혼합비료 유도용액의 성능 평가)

  • Kim, Seung-Geon;Lee, Ho-Won
    • Applied Chemistry for Engineering
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    • v.31 no.1
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    • pp.90-96
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    • 2020
  • This paper aims to reuse sewage by a forward osmosis using a blended fertilizer as a draw solution. This work deals with the primary sedimentation basin influent, effluent, and secondary sedimentation basin effluent from J sewage treatment plant. The average permeate water flux was higher in the order of the blend of KCl and NH4Cl > KCl and NH4H2PO4 > KCl and (NH4)2HPO4, and the reverse solute flux was lower in the order of the blend of KCl and NH4H2PO4 < KCl and NH4Cl < KCl and (NH4)2HPO4. Regardless of the blended fertilizer, the permeate water flux of the effluent from the secondary sedimentation basin was the highest. The blended fertilizer of KCl and NH4H2PO4 was found to be most useful for the reuse of sewage because it contains nitrogen, phosphorus and potassium, which are the major components of a fertilizer, and has a low reverse solute flux. When the blend of KCl and NH4H2PO4 was used as a draw solution, the average permeate water and reverse solute flux for the secondary sedimentation basin effluent were 12.14 L/㎡hr and 0.012 mol/㎡s, respectively.

The Performance Evaluation of Blended Fertilizers as Draw Solution in Forward Osmosis Desalination (유도용액으로 혼합비료를 사용한 정삼투식 해수담수화에서 혼합비료의 성능평가)

  • Kim, Seung-Geon;Lee, Ho-Won
    • Membrane Journal
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    • v.28 no.1
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    • pp.45-54
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    • 2018
  • This study is to find the optimum draw solution in fertilizer-drawn forward osmosis desalination. Considering osmotic pressure, solubility, and pH, 20 blended fertilizers were screened. Their performance were evaluated in terms of pure water permeate flux, reverse solute flux, and specific reverse solute flux for nitrogen, phosphorus, and potassium. The pure water permeate flux of blended fertilizers including KCl were relatively higher. The reverse solute flux and specific reverse solute flux for nitrogen of blended fertilizers containing ${NO_3}^-$ ion were relatively higher than those of the nitrate ion-free draw solution. Those for phosphorus, and potassium of blended fertilizers including $NH_4H_2PO_4$, and $KNO_3$ were relatively higher than those of the phosphorus-free, and potassium-free draw solution, respectively. The blended fertilizer of $NH_4H_2PO_4$ and KCl contains all of nitrogen, phosphorus and potassium which are essential elements of fertilizer, and has the relatively high water permeation flux and the low reverse solute flux for nitrogen, phosphorus, and potassium. Therefore, it is the most effective draw solution for fertilizer-drawn forward osmosis desalination.