TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The atomic hydrogen is conducted via the anti-biofilm-membrane of a biocidal material or a corresponding displaced material before introducing into the methane fermenter or the post-fermentation system. The removal of atomic hydrogen from the metal crystalline lattice of the metal hydride storage takes place depending on physical surrounding parameters, preferably mesophilic, thermophilic or psychrophilic fermentation temperature in the methane fermenter or the post-fermentation system, and a continuous transformation of the biomass. Preferred Components: The hydrogen-partial pressure in the air-tight container is above a static pressure in the methane fermenter or the post-fermentation system. The renewable energy is provided for the electrolysis. The storage is made up of thin metallic layers of rigid or flexible carrier materials, a nano-porous metallic foam or a metal-doped plastic foam, where palladium, magnesium or an intermetallic compound, preferably zirconium-manganese is provided as a reacting material, and the biofilm-inhibiting membrane arranged on the outer side of the storage is coated or doped with silver or copper. The air-tight container is arranged on an outer wall of the methane fermenter or the post-fermentation system, or on a stationary bypass channel mounted/connected in an association with the methane fermenter and/or the post-fermentation system, or on a carrier probe with an adjustable lowering in the methane fermenter, or integrated into a fermenter agitator, where the storage with its output side extends into an inner chamber of the methane fermenter or the post-fermentation system, or into the bypass channel. The bypass channel is backed for receiving phase-separated fermenter liquid through a filter. A hydrogen-regulation is provided for an optional process-based control, where the atomic hydrogen-dosing with respect to a maximum methane rate is adjusted by a hydrogen-sensor in the methane fermenter or the post-fermentation system.