NOVELTY - Supplying fermentable organic matter having solid and liquid portions to digester (2) for producing biogas and digestate, comprises: introducing feedstock to open air holding tank (11) with the aid of pumping system (13); recycling the feedstock as many times as necessary to obtain a homogeneous feedstock; and directing at least a portion of the homogeneous feedstock to the digester, with any remainder being recycled in the holding tank.    USE - The method is useful for supplying fermentable organic matter to a digester for producing biogas and digestate.    ADVANTAGE - The method enables the solid part of fermentable materials mixed with the liquid portion to be injected into the digester as a homogeneous feed stream, while facilitating the mixing and homogenizing of solids before being recycled to the comminution stage, thus avoiding crust formation at the top and bottom deposit in the digester and hindering the release of biogas.    DETAILED DESCRIPTION - Supplying fermentable organic matter having a solid and liquid portions to a digester (2) for producing biogas and digestate, comprises: introducing a feedstock to a open air holding tank (11) with the aid of a pumping system (13), where the feedstock is sucked from the bottom of the holding tank and is discharged from the downstream pumping system to re-inject into the holding tank through its top, where the pumping system is selected to provide a grinding/shredding a solid portion of the feedstock; recycling the feedstock as many times as necessary to obtain a homogeneous feedstock; and directing at least a portion of the homogeneous feedstock to the digester, with any remainder being recycled in the holding tank. An INDEPENDENT CLAIM is also included for an apparatus for implementing the above method, comprising the open air holding tank for receiving a feedstock, and the pumping system for drawing a feed from the bottom of the holding tank and discharging back to the tank or to the digester.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the apparatus.    Digester (2)    Open air holding tank (11)    Pumping system (13)    Stirrer (18)    Storage reservoir (27)