NOVELTY - The system for providing a mixture made of different types of biomass for a plant (1) for producing a reaction product by reaction processes, comprises receiving and storing sites for the different types of biomass, a comminuting unit, a mixer for preparing a homogeneous mixture from two of the different types of biomass, where each receiving and storing site is associated with an analysis unit, by which a content of foreign and/or harmful substances in the different types of biomass is determined and/or verifiable, and a program controller (10).    USE - System for providing a mixture made of different types of biomass for a plant for producing a reaction product by reaction processes.    ADVANTAGE - The system ensures simple and efficient production of the reaction products with high reliability, less effort and less energy requirements by effectively providing the mixture to the plant.    DETAILED DESCRIPTION - The system for providing a mixture made of different types of biomass for a plant (1) for producing a reaction product by reaction processes, comprises receiving and storing sites for the different types of biomass, a comminuting unit, a mixer for preparing a homogeneous mixture from two of the different types of biomass, where each receiving and storing site is associated with an analysis unit, by which a content of foreign and/or harmful substances in the different types of biomass is determined and/or verifiable, and a program controller (10), to which the determined value is transferrable with the analysis unit. A mixed biomass leaving the mixer is adjusted with respect to the percentage portions of the different types of the biomass using the program controller and the parameter of the reaction processes and the system are controllable, so that a formed reaction product contains a predefined portion of foreign and/or harmful substances in a reactor. The receiving and storing sites and the predefined portion of foreign and/or harmful substances of the reaction product are influenced by the conditions of the reaction processes adjusted in the reactor. The reaction processes comprise the production of biogas, and the hydrothermal carbonization of the biomass. In first zone (100) of the reaction processes, providing, grinding and mixing steps of the different types of the biomass take place in the system by hydrothermal carbonization for the production of carbon-containing products made of biomass. In second zone (200) of the reaction processes, preparing and setting steps of the mixed biomass are carried out. In third zone (300) of the reaction processes, the hydrothermal carbonization is carried out. In fourth zone (400) of the reaction processes, a further processing step of the reaction products of the reaction processes is carried out. Three reactors are provided in the third zone for the production of carbon-containing products made of biomass by hydrothermal carbonization. Each reactor has a first inlet in the upper region of the reactor for a first line, an outlet in the lower region of the reactor for a third line, and a second inlet in the upper region of the reactor, where the second inlet is controllably connected with the outlet over a second line. The second line is provided with a heat exchanger and a pump, where a solid/liquid mixture is pumpable into the reactor over the outlet and the second inlet. A stirrer is provided in the reactor and additionally provides for admixing and rolling of the biomass in the reactor. The program controller detects the value of the analysis unit, by which the content of the foreign and/or harmful substances in the different types of the biomass is determined, detects the process parameter of the sensors assigned to the reactor, and controls the system and the reactor, so that the content of the foreign and/or harmful substances in the reaction product is adjusted in a defined manner. The first line, the second line and the third line are provided with controllable two-way-valves and controllable three-way-valves, which are connected with the program controller, so that the specific filling, rolling and evacuating of the three reactors are regulatable and controllable. INDEPENDENT CLAIMS are included for:    (1) a method for providing a mixture made of different types of biomass for a plant for producing a reaction product by reaction processes; and    (2) a reaction product of the hydrothermal carbonization of different types of biomasses.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a system for executing thermal carbonization (Drawing includes non-English language text).    Plant (1)    Program controller (10)    First zone (100)    Second zone (200)    Third zone (300)    Fourth zone. (400)