A Study On The TDS Concentration Difference And Characteristics Of Desorption Using MCDI Process And Circulation Process

Abstract

Extended Abstract Removing ions present in water is one of the important processes in water treatment, and this is called desalination [1]. Desalination technologies include evaporation, ion exchange, and reverse osmosis. However, this technology has problems such as high energy consumption during operation and periodic replacement due to membrane contamination. As a desalination technology that can solve these problems, research on capacitive deionization technology is being conducted, and recently, membrane capacitive deionization technology combining an ion exchange membrane and an electrode is being studied. Membrane capacitive desalination technology is easy to regenerate and maintain by selectively passing ions through adsorption and desorption. However, since adsorption and desorption require the same raw water, this process has a problem in that it must be continuously supplied [2]. Therefore, in this study, a process to increase the recovery rate was developed and the TDS concentration, characteristics of desorption using MCDI process and circulation process were evaluated. The MCDI module used in this study consists of one unit, and aqueous solutions of 100 mg/L and 300 mg/L were used as raw water. A voltage of 1.2 V was applied to each cell, and adsorption and desorption