TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: At least one device for carrying out at least one further process step in the treating area, comprises a heavy object separator (3) for separating the heavy materials and/or a grinding device (4) for crushing the biomass and/or a cyclone (5) for separating the hot air from the biomass. The system is provided with an insulation, at least in portions on the transport devices and/or on at least one silo and/or on at least one device for carrying out the process steps against the ambient temperature. The device for carrying out at least one further process step in the treating region of the system comprises a heavy object separator, a grinding device, a silo, a sieve and/or a cyclone. The system is provided with a silo with an associated discharge device, for storing the biomass. The system is arranged with a hot air recirculation in the treating area for establishing a closed circulation of hot air. The system is provided with a pellet cooler for storing and cooling the produced pellets, which is arranged with the heating device and/or a heat exchanger for reusing the waste heat.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The temperature of the hot air is adjusted with a heating device, where the heating device makes use of fresh air as supply air and/or preheated air from at least one hot air recirculation and/or preheated air from a heat exchanger, heated by the waste heat of a pellet cooler arranged after the pellet press. At least one device for carrying out at least one further process step and the heating device lead the hot air in the treating area in an essentially closed circuit. The hot air, which is circulated in the treating area, is at least regularly exchanged in portions, and/or is filtered. The temperature of the hot air is adjusted in such a way that, the biomass reaches the pellet press with a temperature of greater than 65 degrees C. The biomass leaves the drum dryer with an essential temperature of greater than 65 degrees C. The biomass is transported in a further process step by means of hot air to at least one heavy object separator and/or guided to a grinding device and crushed. The biomass is transported in a further process step by means of hot air, preferably hot air of temperature of 70-80 degrees C, to at least one heavy object separator and heated and/or is passed to a grinding device, crushed and heated. The biomass is loaded in a further process step with hot air, preferably with hot air of temperature of greater than 65 degrees C, in at least one silo and/or in a discharge device associated with the silo. The biomass is separated from the hot air in a further process step after passing through the grinding device and/or the heavy object separator, by means of cyclone, where insufficiently crushed portions of the biomass is fed back to the grinding device and/or the separated hot air is fed to the heating device through a hot air recirculation. The biomass is at least partially warmed during the transporting and/or storage between each processing steps by means of hot air and/or sufficiently insulated against the ambient temperature maintained approximately at the same temperature level. The hot air for the transport medium, the heavy object separator, the grinding device, the silo and/or the cyclone is heated at least to the temperature of the biomass. The biomass is essentially added with water, preferably sprayed, just before passing to the pellet press. The water before or during the addition to biomass, is heated to a temperature of greater than 65 degrees C, preferably 90 degrees C. The water is warmed with the biomass after applying on the biomass, by means of radiation energy. EXAMPLE - No suitable example given.