To improve drying efficiency by spreading an object to be dried like a thin film in a drying system using a vertical type drying apparatus for waste or the like.

In the drying system for objects to be dried, the object F to be dried is put in an interior of a cylindrical drying tank 4, the drying tank is turned by a rotary shaft 6 arranged in the drying tank, and the objects to be dried is brought into contact with a heat transfer face 2 of a drying tank inner face by base blades 5 plurally arranged within a circumferential range of 360 as seen from above and having inclined faces rising in an opposite direction of a turning direction to carry out drying. At least one part of an adjacent base blade in the turning direction is arranged such that when the object to be dried flies out from a rear end of the base blade, it also reaches a base blade positioned higher as a whole, of base blades adjacently positioned to the rear in the turning direction.