Power Generation by Reverse Electrodialysis System Using Industrial Salty Wastewater in a Production Process for Magnesium Compounds from Seawater

抄録

A reverse electrodialysis （RED） system is emerging as a technology that can harvest electric power from salinity gradient energy （SGE） using ion exchange membranes （IEMs）. In many studies, seawater and river water have been used as the feed solutions of RED. On the other hand, to generate high amounts of electric energy, industrial salty wastewater （ISW） could be feed solutions because of its high salinity. In this study, to consider the use of ISW for RED, RED performance of a lab-scale RED which were fed 3 types of ISW pairs, were investigated. As the best performance in this research, the RED stack fed with solutions of ISW having ca. 190 and 7.6 mS/cm of conductivity showed 2.3 W/m² of power density when using low membrane resistance IEM pairs.