What minerals? This isn't tap water. You're condensing it off the copper or aluminium surface of the dehumidifier's or a/c's evap coil. Basically, same surface as the inside of a car's radiator.

And I'm sure that running the water up to 200+F in a car cooling system plus the presence of a chemical soup of antifreeze will kill most germs that might be living in there. It will be fine -- you're not drinking the stuff.