Desalination of brackish ground waters is a solution that thus far has proven helpful, yet historically energy-intensive. With the increasing demand for desalinated water, systems powered by renewable energy are vital for energy-importing countries worldwide.
Static, fixed electrodes used in traditional CDI systems can be replaced with the TDS Select flow electrodes, consisting of carbon particles suspended in an aqueous electrolyte solution, which flow through the cell in the opposite direction of the feed water. Flow electrodes are pumpable and application-specific.
The carbon slurries are regenerated in a separate module or compartment. When an electrical current is applied, the particles act as a moving electrode and attract dissolved ions of the opposite charge.
The slurry particles are carried in separate flow streams from the feed water. This allows the slurry to continuously regenerate outside the flow cell by simply reversing the applied electrical charge. The carbon slurry then repels the ions it carries, much like two magnets of the same polarity. The waste stream is limited to the volume of water needed to carry away the ions removed from the feed water.
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