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.

ABSTRACT
1. 서 론
2. 실험장치 및 방법
    2.1 MCDI Module 구성 및 장치
    2.2 운전조건
3. 결 과
    3.1 유입수 농도에 따른 MCDI 처리수의 TDS 농도변화
    3.2 유속에 따른 MCDI 처리수의 TDS 농도 변화
    3.3 탈착 시 세척수 농도와 탈착 방법에 따른 MCDI처리수의 TDS 농도 변화
    3.4 탈착 시 농축수 사용에 따른 MCDI 처리수의 TDS농도 변화
4. 결 론
References

• 오창석(과학기술연합대학원대학교 건설환경공학과/한국건설기술연구원 국토보전연구본부) | Changseog Oh (School of Civil and Environmental Engineering, University of Science and Technology/Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology)
• 안주석(한국건설기술연구원 국토보전연구본부) | Jusuk An (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology)
• 오현제(과학기술연합대학원대학교 건설환경공학과/한국건설기술연구원 국토보전연구본부) | Hyun-Je Oh (School of Civil and Environmental Engineering, University of Science and Technology/Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology) Corresponding author