NOVELTY - Several stirring blades (10) are radially arranged on a rotary shaft (8) in a cylindrical treatment tank (6) and are actuated by a rotation control unit. A pair of arms (11,12) are prolonged from the center and the edge of the blade respectively.    USE - For processing organic waste using microorganism.    ADVANTAGE - The environment inside the treatment tank is controlled automatically so as to acquire optimal conditions for aerobic bacteria. The organic waste is decomposed completely, without generation of the drain. The residue remaining in the treatment tank is utilized as high-quality fertilizer without the need for secondary fermentation. Enables easy installation of the apparatus. The treatment of gas in the deodorizing apparatus prevents generation of bad smell.    DETAILED DESCRIPTION - The stirring blades are arranged on the rotary shaft in the treatment tank. Each blade group (A,B) is arranged at equal spacing at an interval of 90 degrees. The length of the arms (11,12) are equal to and double the gap between adjacent blade groups respectively. A reducer is arranged between the driving shaft of a motor and the rotary shaft. A display unit displays the output of the motor and an encoder detects the speed of the rotary shaft. An inverter changes the power supply frequency of the motor, such that the rotation speed of the stirring blades is maintained to a desired value. An air-supply control unit is equipped with a blower for supplying outer air in to the lower portion of the tank. The feed water is supplied to the upper portion of the tank by a feed water pump arranged in a water supply control unit. A deodorizing apparatus deodorizes drained out gas and an exhaust control unit ejects the deodorized gas from the upper portion of the tank.    DESCRIPTION OF DRAWING(S) - The figure shows the longitudinal cross-sectional view of the treatment tank.    treatment tank (6)    rotary shaft (8)    stirring blades (10)    arms (11,12)    blade groups (A,B)