NOVELTY - Fermentation processing of low water content active organic material comprises holding an the material in a tumbling-barrel component of a fermentation processing apparatus. The organic material is divided and transferred to four zones where rotation, air-permeability and water-sprinkling control are performed. Fermentation is performed in the processing zone, by solubilization, drying and fermentation.    USE - The method and apparatus are useful for fermentation and processing of organic waste such as organic refuse, livestock excrement, agricultural waste material, food-processing scum and sludge, and as soil improving material or organic fertilizer.    ADVANTAGE - Fermentation decomposition treatment of organic material is performed efficiently and with improved speed. Operation control is performed efficiently and miniaturization of the processing apparatus is attained.    DETAILED DESCRIPTION - Fermentation processing of low water content active organic material comprises holding an the material in a tumbling-barrel component (1) of a fermentation processing apparatus. The barrel component is rotated by a rotary-axis (23) positioned inside the barrel component along the axial direction of the cylinder. The inner space of the tumbling- barrel component comprising stirring blades (31-34) which stir organic material, is divided into several processing zones (A,B,C1,C2). The organic material is divided and transferred to the zones along axial direction. A rotation control, air- permeability control and water-sprinkling control are performed for every processing zones, respectively. Fermentation of organic material is processed in the processing zone, by solubilization, drying and fermentation, respectively. An INDEPENDENT CLAIM is also included for a processing apparatus of organic waste containing tumbling-barrel component, rotary-axis, stirring blade processing zones, water-sprinkling unit and gas-flowing unit. The rotary-axis rotate-drives in all or one portion of the processing zone. A control unit is provided to perform rotation control. The gas flowing unit controls air-permeability and the water-sprinkling unit controls water sprinkling based on the setting moisture content information for the solubilization, drying and fermentation processes.    DESCRIPTION OF DRAWING(S) - The figure shows a transverse- plane sectional drawing of the fermentation processing apparatus.    tumbling-barrel component (1)    rotary-axis (23)    stirring blades (31-34)    processing zones (A,B,C1,C2)