Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A study on the TDS removal characteristics in aqueous solution using MCDI module for application of water treatment process

정수처리 공정 적용을 위한 MCDI (Membrane Capacitive Deionization) Module의 수용액 내 TDS 제거 특성에 관한 연구

  • Oh, Changseog (School of Civil and Environmental Engineering, University of Science and Technology) ;
  • An, Jusuk (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Oh, Hyun-Je (School of Civil and Environmental Engineering, University of Science and Technology)
  • 오창석 (과학기술연합대학원대학교 건설환경공학과) ;
  • 안주석 (한국건설기술연구원 국토보전연구본부) ;
  • 오현제 (과학기술연합대학원대학교 건설환경공학과)
  • Received : 2021.05.28
  • Accepted : 2021.08.15
  • Published : 2021.08.15
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Abstract

Recently, various researches have been studied, such as water treatment, water reuse, and seawater desalination using CDI (Capacitive deionization) technology. Also, applications like MCDI (Membrane capacitive deionization), FCDI (Flow-capacitive deionization), and hybrid CDI have been actively studied. This study tried to investigate various factors by an experiment on the TDS (Total dissolved solids) removal characteristics using MCDI module in aqueous solution. As a result of the TDS concentration of feed water from 500 to 2,000 mg/L, the MCDI cell broke through faster when the higher TDS concentration. In the case of TDS concentration according to the various flow rate, 100 mL/min was stable. In addition, there was no significant difference in the desorption efficiency according to the TDS concentration and method of backwash water used for desorption. As a result of using concentrated water for desorption, stable adsorption efficiency was shown. In the case of the MCDI module, the ions of the bulk solution which is escaped from the MCDI cell to the spacer during the desorption process are more important than the concentration of ions during desorption. Therefore, the MCDI process can get a larger amount of treated water than the CDI process. Also, prepare a plan that can be operated insensitive to the TDS concentration of backwash water for desorption.

Keywords

Acknowledgement

본 결과물은 환경부의 재원으로 한국환경산업기술원의 상하수도 혁신 기술개발사업의 지원을 받아 연구되었습니다.(2020002700003)

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