No, you cannot drink the collected water in the dehumidifier. It is so because it is the extra moisture of your room that is untreated and might contain a lot of germs and other infectious particles.  It is never suggested to drink it as it is not clean, drinkable water. It would be best if you drained it in your bathroom or garden. There are options for gravity drainage, too, as you don’t need the collected water in the tank. It must be wasted properly in time.