NOVELTY - A set of movable blades (10) arranged at the bottom portion (12) of an inlet tank (2), is rotated along an axis (P) parallel to the rotation axis of a drive shaft. A spiral blade (11) arranged in the inlet tank, is rotated in a gap formed between the movable blades.    USE - For producing compost material from organic refuse ejected from home, restaurant, school, etc.    ADVANTAGE - By utilizing both stirring and movable blades, the semifinished products are composted within a short time and the decomposition efficiency of the organic refuse is improved. Since aerobic decomposition of the organic refuse is carried out, the generation of a disagreeable fermentation smell is inhibited. Since a transfer window is used for transferring the processed object after mixing, the fermentation process is carried out automatically without manual operation. Since mixed stirring is carried out in the intermediate tank, the processed object can be transferred to several tanks. The sweeping boards provided to the spiral blade, enable stirring of processed object with air.    DETAILED DESCRIPTION - The spiral blade is provided with several sweeping boards (21) to dip up and rake out the processed object. The processed object from the inlet tank is transferred into an ejection tank (3) through a transfer window provided at the upper portion of the inlet tank. The ejected processed object is stirred by a stirring mechanism and discharged to the outside through a discharge port by a linkage mechanism which includes a raking-out blade. The raking-out blade is rotated in the gap formed at the bottom portion (35) of the ejection tank. An intermediate tank with stirring and movable blades, is provided between the inlet and ejection tanks.    DESCRIPTION OF DRAWING(S) - The figure shows the front view of interior of the compost material production apparatus.    Inlet tank (2)    Ejection tank (3)    Movable blades (10)    Spiral blade (11)    Bottom portion of inlet tank (12)    Sweeping boards (21)    Bottom portion of ejection tank (35)