NOVELTY - The apparatus injects organic waste (12) into processing tank (15) in which fermentation process is performed. An air ejection port provided in bottom portion of processing tank, blows off the air supplied from air supply source to the organic waste. A stirring rotor (19) stirs the organic waste by rotating in the area provided in the moving case (17) and does not contact the push-up element (70). A hydraulic cylinder (60) raises the push-up element in the push-up position higher than the bottom face of the processing tank.    USE - Fermentation process apparatus of organic waste e.g. livestock dung and foodstuff residue.    ADVANTAGE - The air can be reliably supplied to organic waste and fermentation of organic waste can be accelerated. The formation of lamina-dura layer can be suppressed.    DETAILED DESCRIPTION - The apparatus includes a push-up element is provided in the bottom portion of the processing tank so that a vertical movement is possible. The air is supplied from the air supply source in box portion. The air ejection port is formed by penetrating upper wall. The push-up element and the hydraulic cylinder are accommodated in the box portion. The push-up element constitutes the shape which penetrates the air ejection port. The hydraulic cylinder passes along the air ejection port and is raised to the push-up position, from the stand-by position accommodated in the box portion in the push-up element. A pair of side walls opposingly arranged on both sides of the push-up element in the stand-by position, is extended from the hole edge of the air ejection port in the upper wall of the box portion. A ventilation portion is formed in one side wall by penetrating the portion among a pair of side wall portions. The ventilation portion enables penetration of the air in the box portion to the air ejection port side, when the push-up element exists in the stand-by position. The upper portion of the push-up element closes at least one portion of the ventilation portion in the stand-by position. The ventilation hole is formed in the wall at the side of the ventilation portion of the closed portion, and the wall portion at the side of the air ejection port, respectively. The push-up element forms longshape in planar view.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of the stirring apparatus and air supply apparatus.    Organic waste (12)    Processing tank (15)    Moving case (17)    Stirring rotor (19)    Hydraulic cylinder (60)    Push-up element (70)