When you dehydrate limes, you actually get 2 great uses out of them. I first use my citrus zester and use it on the outside of the limes to get lime zest.
I freeze some of it for use in recipes but the rest I dehydrate and grind into lime powder. This can be added to recipes or drinks.
Once that is done, I slice the limes with my mandolin and then put the lime slices in the dehydrator over night.