TECHNOLOGY FOCUS - AGRICULTURE - Preferred Components: The biomass is fed into the pelleting press by the metering device according to the effect of gravity. The feeding and/or the distributing steps are performed by the distribution devices adjacent to the pan grinding roller or the feeding region. The biomass is distributed between the pelleting press and the metering device by a roller. The biomass is fed in a large amount in the direction of rotation of the annular die by using many pan grinding rollers on the periphery of the annular die of the first pan grinding roller than the subsequent pan grinding rollers. The ratio of the distributed biomass is adjusted for the annular die depending on the current distance of the respective pan grinding roller, before the individual pan grinding roller. The distribution of the biomass is adjusted for the annular die in relation to two different distances occurring at the pan grinding roller so that the less biomass is fed at a greater distance, and the more biomass is fed at a shorter distance of the respective pan grinding roller. The periphery of the annular die is determined by a detecting device, which detects a defect in a normal operating existing compressed residual layer of the biomass on the annular die, and the defect is introduced by a feeding device of the biomass. The biomass is moistened and/or oiled at least in a defective region and/or the annular die in a defective region by a device for improving the adhesion to the annular die, or the feeding of the biomass in the feeding region. The biomass is distributed by the annular die with at least one bridge to the next bridge.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The pelleting press is arranged in the direction of gravity caused by the falling direction of the biomass. The distributing devices are arranged adjacent to the pan grinding roller or the feeding region. The distributing devices are arranged in the arrangement of many pan grinding rollers on the periphery of the annular die for feeding the large amount of the biomass in the direction of rotation of the annular die of the first pan grinding roller. A controlling- or a regulating device is arranged for processing of a measurement result of a distance measuring device between the pan grinding roller and the annular die, and for adjusting the distributing devices. At least one detecting device is arranged adjacent to the periphery of the annular die for detecting a defect in a normal operating existing compressed residual layer of the biomass on the annular die, and is provided with a feeding device, which is operatively connected to the defect for the biomass. A device for moistening or oiling the biomass, and/or moistening and/or oiling the annular die is arranged for improving the adhesion of the biomass to the annular die, or for improving the feeding of the biomass in the feeding region. The pan grinding roller is arranged only on the upper hemisphere of the annular die. The metering device is a screw- or a belt conveyor device. A distributing device is arranged in the annular die with the bridge for distributing the biomass to the next bridge.