NOVELTY - The process comprises depositing (31) a carbon substrate layer comprising agricultural residues and/or agrofood residues of constant thickness on a part of a fermentation tank, enriching (32) the layer by uniformly spraying (321) a predetermined quantity of draining material on a surface of the layer and by sampling (322) a portion of the non absorbed draining materials by the layer at the bottom of the tank, and allowing (323) the mixture for partial transformation by aerobic fermentation. The quantity of draining material enters through layer by percolation to form a fermentable mixture.    USE - The process is useful for obtaining an organic amendment of soil from draining material collected in an installation and/or non collective sewerage network, where the draining material is useful as compost or manure.    ADVANTAGE - The process is capable of economically, rapidly, efficiently, simply and reliably obtaining the organic amendment of soil from draining material collected in the installation and/or non collective sewerage network in an environmental friendly manner.    DETAILED DESCRIPTION - The process comprises depositing (31) a carbon substrate layer comprising agricultural residues and/or agrofood residues of constant thickness on a part of a fermentation tank, enriching (32) the layer by uniformly spraying (321) a predetermined quantity of draining material on a surface of the layer and by sampling (322) a portion of the non absorbed draining materials by the layer at the bottom of the tank, and allowing (323) the mixture for partial transformation by aerobic fermentation. The quantity of draining material enters through the layer by percolation to form a fermentable mixture. The spraying step is controlled by programmable automation. An INDEPENDENT CLAIM is included for a station for treating draining material collected in an installation and/or non collective sewerage network.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a process for obtaining the organic amendment of soil from draining material.    Depositing a carbon substrate layer on a part of a fermentation tank (31)    Enriching the layer (32)    Spraying a predetermined quantity of the draining material on a surface of the layer (321)    Sampling a portion of the non absorbed draining materials (322)    Allowing the mixture for partial transformation by aerobic fermentation. (323)