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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2018.28.1.45

The Performance Evaluation of Blended Fertilizers as Draw Solution in Forward Osmosis Desalination  

Kim, Seung-Geon (Dept. of Chemical and Biological Engineering, Jeju National University)
Lee, Ho-Won (Dept. of Chemical and Biological Engineering, Jeju National University)
Publication Information
Membrane Journal / v.28, no.1, 2018 , pp. 45-54 More about this Journal
Abstract
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.
Keywords
forward osmosis; blended fertilizer; desalination; water permeate flux; reverse solute flux;
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Times Cited By KSCI : 1  (Citation Analysis)
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