The concentrated brine between the two membranes is flushed from the system. The charge of the electrodes is returned to normal and the system is again ready to desalinate.
[[Image:Animatie FTC 1van4capdi.jpgpng|thumb|rightcenter|300px500px|]] [[Image:Animatie FTC 2van4.jpg|thumb|right|300px|Step 1]] [[Image:Animatie FTC 3van4.jpg|thumb|right|300px|Step 2]] [[Image:Animatie FTC 4van4.jpg|thumb|right|300px|Step 3]]
Voltea’s award-winning desalination technology, CapDI (Capacitive deionization), is a simple and innovative way to remove dissolved salts from water with high recovery rate and low energy consumption.