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    Freeze desalination of seawater using LNG cold energy

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    Description:
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    Type
    Article
    Authors
    Chang, Jian
    Zuo, Jian
    Lu, Kang-Jia
    Chung, Neal Tai-Shung cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2016-06-24
    Online Publication Date
    2016-06-24
    Print Publication Date
    2016-10
    Permanent link to this record
    http://hdl.handle.net/10754/614819
    
    Metadata
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    Abstract
    With the aid of cold energy from regasification of liquefied natural gas (LNG), freeze desalination (FD) is an emerging technology for seawater desalination because of its low energy characteristics and insensitivities to fouling problems. This work aims to investigate the major operating parameters of FD such as coolant temperature, freezing duration, supercooling, seeding, agitation, crystallizer material and subsequent washing procedure on ice production and water quality. It was found that the optimal freezing duration per batch was 1 h for an iron crystallizer and 1.5 h for a glass crystallizer. The optimal coolant temperature should be around −8 °C. The optimal amount of washing water to clean the raw ice was about 50 wt% of the raw ice. Over 50 wt% of the feed could be recovered as raw ice within 1 h, which means an overall ice recovery rate of higher than 25% (of the original seawater), considering the consumption of washing water. Both artificial and real seawater were tested under the optimized conditions. The total dissolved solid in the product ice was around 300 ppm, which met the World Health Organization (WHO) potable water salinity standard of 500 ppm. Therefore, the process parameters optimized in this study can be directly used for the freeze desalination of seawater.
    Citation
    Freeze desalination of seawater using LNG cold energy 2016 Water Research
    Sponsors
    The authors would like to thank Singapore National Research Foundation under its Energy Innovation Research Programme for supporting the project entitled, “Using Cold Energy from Re-gasification of Liquefied Natural Gas (LNG) for Novel Hybrid Seawater Desalination Technologies” (Grant number: R-279-000-456-279).
    Publisher
    Elsevier BV
    Journal
    Water Research
    DOI
    10.1016/j.watres.2016.06.046
    PubMed ID
    27371931
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S0043135416304845
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2016.06.046
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)

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