NOVELTY - The continuous fermentation device comprises: an enclosure (100) partially filled with a fermentation material (115) and partially filled an atmosphere of gas above the fermentation material, where the enclosure presents a ceiling (104); a set of conduits for the injection of the fermentation material in the enclosure; a unit (119) for taking away the fermentation material in the enclosure; a wall (103) for separating compartments in the enclosure holding the separate atmospheres on each side of the wall; and a unit for sampling the gas in the atmosphere.    USE - The device is useful for continuous fermentation such as anaerobic fermentation of waste for reducing the organic matter and producing energy in the form of biogas, where the waste is a household food waste, a waste from sewage treatment plants, and urban, industrial and agricultural wastes.    ADVANTAGE - The device is capable of economically performing the continuous fermentation of the waste in a simple manner.    DETAILED DESCRIPTION - The continuous fermentation device comprises: an enclosure (100) partially filled with a fermentation material (115) and partially filled an atmosphere of gas above the fermentation material, where the enclosure presents a ceiling (104); a set of conduits for the injection of the fermentation material in the enclosure; a unit (119) for taking away the fermentation material in the enclosure; a wall (103) for separating compartments in the enclosure holding the separate atmospheres on each side of the wall; a unit for sampling the gas in the atmosphere, and a unit for injecting the sample gas in one of the compartments; a unit for injecting a compressed gas through the conduits; a lid adapted to block or pass the material in each conduit; a unit for pressing or centrifugation of the material; and a unit for injection of material configured to inject a solid material output from the unit of pressing or centrifugation in the conduits or unit for injection of material configured to inject liquid material output from the unit of pressing or centrifugation. The set of conduits injects the fermentation material taken by the unit for taking away. The gas injection unit is configured to inject the gas into the fermentation material. The conduits are configured to extend from the ceiling to the fermentation material of the enclosure and to extend from the ceiling to 90% of the ceiling height from the bottom of the enclosure.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic sectional view of a continuous fermentation device.    Enclosure (100)    Separation wall (103)    Ceiling (104)    Fermentation material (115)    Unit for taking away the fermentation material. (119)