NOVELTY - The device comprises a container (1) for receiving biomass, a device for delivering the biomass to a biogas plant (5), a biomass-comminution unit provided between the container and the biogas plant, and conveyor screws arranged downstream to the comminution unit (8). The rough, fibrous and heavily decomposable parts of the silage such as cut grass, plant stems and/or green plant material decompose into very small parts to process the silage to a liquid mesh. The biomass-comminution unit is a cutting device, which has tools of rotating cutting blades working perpendicular to each other.    USE - Device for processing biomass for producing biogas.    ADVANTAGE - The device is capable of effectively and economically processing the biomass with minimal effort on mechanical performance thus ensuring the optimal production of the biogas with high efficiency and high yield, and quickly decomposes the biomass and the other organic matter.    DETAILED DESCRIPTION - The device comprises a container (1) for receiving biomass, a device for delivering the biomass to a biogas plant (5), a biomass-comminution unit provided between the container and the biogas plant, and conveyor screws arranged downstream to the comminution unit (8). The rough, fibrous and heavily decomposable parts of the silage such as cut grass, plant stems and/or green plant material decompose into very small parts to process the silage to a liquid mesh. The biomass-comminution unit is a cutting device, which has two tools of rotating cutting blades working perpendicular to each other and is driven by an electric motor (9). The rotating blades are arranged in a tubular housing, whose diameter is slightly larger than the diameter of the rotating blade. The cutting tools are formed as a straining rod for processing the silage mesh. A foreign body channel (6) is arranged at an outlet of the container and controls the sorting of plastic waste (bottles, cans, cups and sheets) and sheet metal or metal waste (cans and other metal parts) by magnets or induction devices. The conveyor screws dose the mesh into the biogas plant. An agitator is connected to the comminution unit and is provided for moving the processed biomass with cereals or additives. The container has a lockable lid. A chamber of the container locked by the lid is connected to the biogas plant by using a connecting pipeline, through which the cooled exhaust gases from a combustion engine of the biogas plant are injected to cool a dosing unit.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of a silage container.    Container (1)    Biogas plant (5)    Foreign body channel (6)    Comminution unit (8)    Electric motor. (9)