NOVELTY - The anaerobic digestion process comprises subjecting wort to solid and liquid separation phases, and extracting a main product from a first vegetable material transformed into the wort. The anaerobic digestion is carried out in a liquid phase containing suspension materials (MES) such as a co-product having a mass content of lower than 0.2% in the liquid phase. The separation of solid and liquid phase is carried out by filter press, band filters or by centrifugation, after a first physio-chemical treatment including coagulation-flocculation and addition of reactants.    USE - The process is useful for anaerobic digestion of water from a liquid phase containing suspension materials such as a co-product, and for the production of biofuel.    ADVANTAGE - The process ensures economical and rapid anaerobic digestion of water from a liquid phase containing suspension materials such as a co-product with high performance and without risk of infection and blockage in biological activity, and allows large production of high quality biofuel with less number of process steps.    DETAILED DESCRIPTION - The anaerobic digestion process comprises subjecting wort to solid and liquid separation phases, and extracting a main product from a first vegetable material transformed into the wort. The anaerobic digestion is carried out in a liquid phase containing suspension materials (MES) such as a co-product having a mass content of lower than 0.2% in the liquid phase. The separation of solid and liquid phase is carried out by filter press, band filters or by centrifugation, after a first physio-chemical treatment including coagulation-flocculation and addition of reactants. The digestion is carried out through a granular sludge bed, in a culture reactor fixed on a free media and a packing, or in Anapulse, Anaflux and Anafiz digesters. The effluent from the digestion is subjected to additional treatment with a clean filter to obtain a particle having a size of greater than or equal to 0.2 microns and to manufacture wort, and concentrated to produce condensates free of salts, which are recycled at the main production process. The filtration is carried out by reverse osmosis using membranes.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart of a process for anaerobic digestion of water (Drawing includes non-English language text).