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Integrated Capacitive Deionization and Humidification-Dehumidification System for Brackish Water Desalination

Author

Listed:
  • Sadam-Hussain Soomro

    (Department of Mechanical Convergence Engineering, Hanyang University School of Mechanical Engineering, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea)

  • Yusufu Abeid Chande Jande

    (Department of Materials and Energy Sciences and Engineering, The Nelson Mandela African Institution of Science and Technology, Arusha P.O. Box 447, Tanzania
    Water Infrastructure and Sustainable Energy Futures (WISE-Futures) Center, The Nelson Mandela African Institution of Science and Technology, The Nelson Mandela Road, Arusha P.O. Box 447, Tanzania)

  • Salman Memon

    (Department of Mechanical Design Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Gyeonggi-do, Korea)

  • Woo-Seung Kim

    (Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Gyeonggi-do, Korea)

  • Young-Deuk Kim

    (Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Gyeonggi-do, Korea
    BK21 FOUR ERICA-ACE Center, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Gyeonggi-do, Korea)

Abstract

A hybrid capacitive deionization and humidification-dehumidification (CDI–HDH) desalination system is theoretically investigated for the desalination of brackish water. The CDI system works with two basic operations: adsorption and regeneration. During adsorption, water is desalted, and during the regeneration process the ions from electrodes are detached and flow out as wastewater, which is higher in salt concentration. This wastewater still contains water but cannot be treated again via the CDI unit because CDI cannot treat higher-salinity waters. The discarding of wastewater from CDI is not a good option, since every drop of water is precious. Therefore, CDI wastewater is treated using waste heat in a process that is less sensitive to high salt concentrations, such as humidification-dehumidification (HDH) desalination. Therefore, in this study, CDI wastewater was treated using the HDH system. Using the combined system (CDI–HDH), this study theoretically investigated brackish water of various salt concentrations and flow rates at the CDI inlet. A maximum distillate of 1079 L/day was achieved from the combined system and the highest recovery rate achieved was 24.90% from the HDH unit. Additionally, two renewable energy sources with novel ideas are recommended to power the CDI–HDH system.

Suggested Citation

  • Sadam-Hussain Soomro & Yusufu Abeid Chande Jande & Salman Memon & Woo-Seung Kim & Young-Deuk Kim, 2021. "Integrated Capacitive Deionization and Humidification-Dehumidification System for Brackish Water Desalination," Energies, MDPI, vol. 14(22), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7641-:d:679771
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    References listed on IDEAS

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    1. Lawal, Dahiru U. & Jawad, Saad A. & Antar, Mohamed A., 2020. "Experimental and theoretical study on a heat pump driven open-air humidification dehumidification desalination system," Energy, Elsevier, vol. 207(C).
    2. Shahzad, Muhammad Wakil & Thu, Kyaw & Kim, Yong-deuk & Ng, Kim Choon, 2015. "An experimental investigation on MEDAD hybrid desalination cycle," Applied Energy, Elsevier, vol. 148(C), pages 273-281.
    3. Lawal, Dahiru U. & Qasem, Naef A.A., 2020. "Humidification-dehumidification desalination systems driven by thermal-based renewable and low-grade energy sources: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 125(C).
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