NOVELTY - Treating percolate water produced during dry fermentation, comprises using a first percolate water container (P1), a second percolate water container (P2) and many fermentation chambers (F1-F6) and charging one of the fermentation chamber in each case from the second percolate water container, with steps comprising: charging many fermentation chambers from a first percolate water container during a first period; and charging a further fermentation chamber from a second percolate water container during the first period.    USE - The method is useful for treating percolate water produced during dry fermentation.    ADVANTAGE - The method: reduces the loading of the excess percolate water, thus reducing the disposal costs of the treated excess percolate water; increases the formation of biogas by utilizing the residual organics; lowers the inhibiting effect of the raw percolate water; and reduces the emission of carbon dioxide and methane into the atmosphere.    DETAILED DESCRIPTION - Treating percolate water produced during dry fermentation, comprises using a first percolate water container (P1), a second percolate water container (P2) and many fermentation chambers (F1-F6) and charging one of the fermentation chamber in each case from the second percolate water container, with steps comprising: charging many fermentation chambers from a first percolate water container during a first period; charging a further fermentation chamber from a second percolate water container during the first period; feeding purified percolate water from the outlet of a sedimentation container into the second percolate water container or directly into a fermentation chamber which is just charged from the second percolation water container; cyclically charging and feeding percolate water circulate from the fermentation chamber to the second percolate water container from many fermentation chambers or from the second percolate container.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic illustration of charging the percolate water containers and the fermentation chambers.    First percolate water container (P1)    Second percolate water container (P2)    Fermentation chambers (F1-F6)