NOVELTY - The apparatus comprises a reactor vessel (12) that is pressurized and in which both anaerobic digestion and aerobic composting of organic material occur. The reactor vessel has an inlet (14) and an outlet (16) for an organic material, and is provided together with conveyor units (18, 20, 22, 28, 29, 30, 32, 35, 34, 36) to convey the organic material to the inlet and from the outlet. The organic material is transferred between the outlet and the inlet to achieve recirculation and/or rearrangement of the organic material whilst maintaining a pressurized state.    USE - The apparatus is useful for a pressurized recirculation of organic material such as an organic solid of an organic fraction of municipal solid waste (all claimed), where the waste is kitchen waste and green waste.    ADVANTAGE - The apparatus allows effective pressurized recirculation of organic material.    DETAILED DESCRIPTION - The apparatus comprises a reactor vessel (12) that is pressurized and in which both anaerobic digestion and aerobic composting of organic material occur. The reactor vessel has an inlet (14) and an outlet (16) for an organic material, and is provided together with conveyor units (18, 20, 22, 28, 29, 30, 32, 35, 34, 36) to convey the organic material to the inlet and from the outlet. The organic material is transferred between the outlet and the inlet to achieve recirculation and/or rearrangement of the organic material whilst maintaining a pressurized state. The conveyor units are: located in part externally to the reactor; arranged to allow the maintenance of pressurized conditions; provided with seal units to facilitate maintenance of the pressurized state; and comprised of a series of individual conveyors. The individual conveyors are provided with dewatering units. A portion of the dewatering units is provided in the form of 180 degrees screens and as dewatering presses. A moisture content of the conveyed organic material is reduced to 40-60%. The seal units are provided in the form of shaft seals and/or housing seals. An INDEPENDENT CLAIM is included for a method for the pressurized recirculation of organic material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an apparatus for the pressurized recirculation of organic material.    Reactor vessel (12)    Inlet (14)    Outlet (16)    Conveyor units (18, 20, 22, 28, 29, 30, 32, 35, 34, 36)    Biogas line. (60)