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http://dx.doi.org/10.9713/kcer.2013.51.2.240

Performance Evaluation of Absorbent Solution for Draw Solute Recovery in Forward Osmosis Desalination Process  

Kim, Young (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Lee, Jong Hoon (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Lee, Kong Hoon (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Kim, Yu-Chang (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Oh, Dong Wook (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Lee, Jungho (Department of Thermal Systems, Korea Institute of Machinery & Materials)
Publication Information
Korean Chemical Engineering Research / v.51, no.2, 2013 , pp. 240-244 More about this Journal
Abstract
Although forward osmosis desalination technology has drawn substantial attention as a next-generation desalination method, the energy efficiency of its draw solution treatment process should be improved for its commercialization. When ammonium bicarbonate is used as the draw solute, the system consists of forward-osmosis membrane modules, draw solution separation and recovery processes. Mixed gases of ammonia and carbon dioxide generated during the draws solution separation, need to be recovered to re-concentrate ammonium bicarbonate solution, for continuous operation as well as for the economic feasibility. The diluted ammonium bicarbonate solution has been proposed as the absorbent for the draw solution regeneration. In this study, experiments are conducted to investigate performance and features of the absorption corresponding to absorbent concentration. It is concluded that ammonium bicarbonate solution can be used to recover the generated ammonia and carbon dioxide. The results will be applied to design and operation of pilot-scale forward-osmosis desalination system.
Keywords
Draw Solute Recovery; Forward Osmosis Desalination; Ammonium Bicarbonate; Absorbent;
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