(613e) Development of Multi-Cell Pair Shock Wave Electrodialysis for Desalination

Shock Waves Electrodialysis (SWED) is an innovative separation technology using microfluidic technology within Electrodialysis (ED) stacks. Operating in an over-limiting condition, SWED enhances ion separation efficiency by generating a shock-wave line in the fluid chamber using charged porous media. While existing studies have primarily focused on single-cell SWED devices, the design and performance of a multiple-pair cell stack are paramount for scaling up SWED processes in industrial applications. In this study, we develop the first multi-cell pairs SWED stack for desalination, integrating ion exchange resin wafer (RW) material to replace the charged porous media. Our preliminary results demonstrate the developed SWED device's capability to convert a feed solution with a NaCl concentration of 1g/L into a dilute stream with a concentration lower than 0.67 g/L and a concentration stream of approximately 1.38 mg/L. We have explored the approaches to increase the separation performance such as using smaller resin beads size (50 um compared to 300 um) and reducing the RW pore size during fabrication. Besides, a preliminary techno-economic assessment based on experimental data on separation performance, reclaimed water productivity, and energy consumption has been conducted. Finally, we discuss several promising avenues for future research and application of SWED technology. In conclusion, this study significantly contributes to the development of more energy-efficient and viable resource recovery technologies.