NOVELTY - Device for biological degradation of organic material and for producing biogas from degradation, comprises closed container with filling opening for the organic material and discharge openings for the degradation products; and rotary component(s) (26) mounted on a shaft (24) and arranged for rotation in the container. Each rotary component comprises plate-shaped component(s) (28) and a moving device (30) for moving the organic material from a first side (30a) of the moving device to a second side of the moving device.    USE - Device for biological degradation of organic material and for producing biogas from degradation.    ADVANTAGE - The device is compact and independent and flexible in installation and use; can handle high proportions of dry solids; requires a shorter residence time than the prior art; and contains large surfaces to which the bacteria can become attached, where various bacteria will be stationary and stable in the reactor's axial direction. It can be run with high dry solids content, with the result that the organic final product will be easier to handle. While the prior art operates with dry solids content of 5-15% and thus, is dependent on large quantities of water, the device can operate with a dry solids content of 40-50%. The problem of foam production is reduced, since the wings' rotation will pull the foam back down into the organic mass. On each rotary component, the disc and the associated wings together form a large surface, which is exposed to the organic mass. This surface will be covered by bacteria, which will contribute to the degradation of the organic material. When the rotary components rotate, they will provide the basis for more bacterial growth, and bacteria will intermix with the organic material, speeding up the degradation.    DESCRIPTION OF DRAWING(S) - The drawing is a side view of rotary component.    Shaft (24)    Rotary component (26)    Plate-shaped component (28)    Moving device (30)    First side of moving device (30a)