NOVELTY - The supply device (1) for introducing a solid deliverable material into a sealed system such as a fermenter of a biogas plant, comprises a conveyor screw (11) arranged within the screw tubes and transporting the deliverable material in a conveying direction, an inlet opening (9), through which the deliverable material enters into the conveyor screw, an outlet opening, through which the deliverable material discharges out from the conveyor screw, and a pre-press screw (6), which connects to the inlet opening and conveys the deliverable material into the conveyor screw.    USE - Supply device for introducing a solid deliverable material into a sealed system such as a fermenter of a biogas plant.    ADVANTAGE - The supply device can be economically manufactured with less space requirements.    DETAILED DESCRIPTION - The supply device (1) for introducing a solid deliverable material into a sealed system such as a fermenter of a biogas plant, comprises a conveyor screw (11) arranged within the screw tubes and transporting the deliverable material in a conveying direction, an inlet opening (9), through which the deliverable material enters into the conveyor screw, an outlet opening, through which the deliverable material discharges out from the conveyor screw, and a pre-press screw (6), which connects to the inlet opening and conveys the deliverable material into the conveyor screw. The pre-press screw connects at an oblique angle or transverse to the conveyor screw. A rinsing chamber connects to the outlet opening of the conveyor screw, and has connections for supplying and discharging the flowable materials. A line guided to the rinsing chamber is denoted as a manure line and a line lead away from the rinsing chamber is denoted as mixture line. A dissolving device is arranged in the rinsing chamber, dissolves the solid deliverable material and is designed with the flowable material denoted as manure and reaching into the rinsing chamber in an intermixing manner. A single drive engine is arranged to the dissolving device. The supply device has an elongated storage container (2), which receives the solid deliverable material, where the conveyor screw is arranged in the longitudinal direction of the storage container. The rinsing chamber is arranged in an elongated manner and is arranged in the longitudinal direction of the storage container. A bottom conveyor is provided at the bottom of the storage container and conveys the deliverable material to the pre-press screw. The supply device has a width of highly 2.5 m, and comprises an electronic controller, where several sensors are assigned to the electronic controller and detect the pressure and the flow velocity in the manure line. The electronic controller controls the rotation speed of the conveyor screw and the pre-press screw. During exceeding a specified pressure and a specified flow velocity in the manure line, the controller reduces the rotation speed of the conveyor screw and the pre-press screw.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of a supply device.    Supply device (1)    Storage container (2)    Pre-press screw (6)    Inlet opening (9)    Conveyor screw. (11)