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Advanced Wastewater Treatment: Synergistic Integration of Reverse Electrodialysis with Electrochemical Degradation Driven by Low-Grade Heat

Author

Listed:
  • Qiang Leng

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Feilong Li

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Zhenxin Tao

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Zhanwei Wang

    (Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Luoyang 471023, China)

  • Xi Wu

    (School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China)

Abstract

The reverse electrodialysis heat engine (REDHE) represents a transformative innovation that converts low-grade thermal energy into salinity gradient energy (SGE). This crucial form of energy powers reverse electrodialysis (RED) reactors, significantly changing wastewater treatment paradigms. This comprehensive review explores the forefront of this emerging field, offering a critical synthesis of key discoveries and theoretical foundations. This review begins with a summary of various oxidation degradation methods, including cathodic and anodic degradation processes, that can be integrated with RED technology. The degradation principles and characteristics of different RED wastewater treatment systems are also discussed. Then, this review examines the impact of several key operational parameters, degradation circulation modes, and multi-stage series systems on wastewater degradation performance and energy conversion efficiency in RED reactors. The analysis highlights the economic feasibility of using SGE derived from low-grade heat to power RED technology for wastewater treatment, offering the dual benefits of waste heat recovery and effective wastewater processing.

Suggested Citation

  • Qiang Leng & Feilong Li & Zhenxin Tao & Zhanwei Wang & Xi Wu, 2024. "Advanced Wastewater Treatment: Synergistic Integration of Reverse Electrodialysis with Electrochemical Degradation Driven by Low-Grade Heat," Energies, MDPI, vol. 17(21), pages 1-24, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:21:p:5362-:d:1508435
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    References listed on IDEAS

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