NOVELTY - An agitator comprises two cylindrical agitating tanks integrated into a single structure at opened portions of their side walls, a rotating shaft axially installed along a central axis of each tank, agitating rods attached to each shaft within the tank, with a paddle attached to an end of each rod; and crushing protrusions on an inner surface of a side wall of each tank.    USE - For agitating fermented products, or for agitating and crushing garbage, rubbish or trash to dry the material in garbage treatment systems.    ADVANTAGE - The inventive agitator quickly dries the garbage in the garbage treatment systems. It effectively crushes colloidal fermented products during a garbage agitating process. It improves the operational efficiency of the garbage treatment systems, in addition to improving its operational performance. It does not need to force an owner of the treatment systems to purchase any separate garbage crusher.    DETAILED DESCRIPTION - An agitator comprises first and second cylindrical agitating tanks (10, 20) partially opened at their side walls to form opened portions, and integrated into a single structure at the opened portions, a rotating shaft (11, 21) axially installed along a central axis of each tank, agitating rods attached to each shaft within the tank, with a paddle attached to an end of each rod, each paddle is positioned around opposite ends of the tanks having notches at its outside edge, and crushing protrusions provided on an inner surface of a side wall of each tank at positions around a junction ridge of the tanks and corresponding to the notches. The protrusions are equal to that of the notches. The notched paddles pass over the protrusions during a rotating action of the shafts within the tanks while crushing fermented products which is introduced into gaps between the notches and the protrusions.    DESCRIPTION OF DRAWING(S) - The figure shows a side view of an agitator.    Housing (2)    Agitating tanks (10, 20)    Rotating shaft (11, 21)