NOVELTY - Fermenter supply method for a biogas plant (0), comprises supplying an inoculum fermenter chamber (1) with raw fermentation substrate and fermenting, recycling part of the substrate fermented in the inoculum fermenter chamber directly back into the inoculum fermenter chamber, and supplying at least one fast fermenter chamber (2) coupled to the inoculum fermenter chamber with an additional part of the substrate fermented in the inoculum fermenter chamber and mixing the additional part with fast fermenter raw substrate in an amount per unit of time.    USE - The method is useful for fermenter supply for a biogas plant.    DETAILED DESCRIPTION - Fermenter supply method for a biogas plant (0), comprises supplying an inoculum fermenter chamber (1) with raw fermentation substrate in an amount per unit of time and fermenting for a dwell time, recycling part of the substrate fermented in the inoculum fermenter chamber in the form a self-inoculating substrate (32) directly back into the inoculum fermenter chamber over a return path (110) using a mixture with the raw fermentation substrate, and supplying at least one fast fermenter chamber (2) coupled to the inoculum fermenter chamber with an additional part of the substrate fermented in the inoculum fermenter chamber in the form of a fast fermenter inoculating substrate and mixing the additional part with fast fermenter raw substrate in an amount per unit of time. The fermented output substrate is removed from the fast fermenter chamber after a dwell time of the substrate mixture introduced into the fast fermenter chamber. INDEPENDENT CLAIMS are also included for:    (1) the biogas plant (0) comprising many fermenter chambers, where (a) at least one first inoculum fermenter chamber with return path for self-inoculation and at least one fast inoculum path for supplying at least one fast fermenter chamber with fast fermenter inoculating substrate are provided as a part of substrate fermented in the inoculum fermenter chamber, (b) the dwell time of the substrate in at least one fast fermenter chamber coupled to at least one inoculum fermenter chamber is smaller than the dwell time of the substrate in at least one inoculum fermenter chamber; and    (2) conversion process of the biogas plant with at least one fermenter chamber, comprising installing the fermentation chamber, which is coupled with fast inoculum path to the outlet of the inoculum fermenter chamber such that the fast fermenter inoculating substrate is miscible and fermentable in the fast fermenter chamber with fast fermenter raw substrate.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the biogas plant with inoculum fermenter chamber and the fast fermenter chamber.    Biogas plant (0)    Inoculum fermenter chamber (1)    Fast fermenter chamber (2)    Self-inoculating substrate (32)    Return path (110)