NOVELTY - Biomass digestion comprises: obtaining a post-mesophilic stage feed stream from a biomass digestion process, where the feed stream includes effluent, decomposed solids and one or more biogases, and the feed stream is produced after undergoing some aerobic hydrolysis; transferring at least a portion of a post-mesophilic stage feed stream to a dewatering stage, and separating after transferring the post-mesophilic stage feed stream to at least a liquid phase and a solids phase; and transferring at least a portion of the liquid phase for further processing.    USE - The biomass digestion method is useful for producing biosolid and biogas composition, and liquid fertilizer composition. The biomass digestion method is useful for treating and removing organic compounds from waste streams, such as sewage, sewage sludge, chemical wastes, food processing wastes, agricultural wastes, animal wastes including manure, and other organic waste and materials. No biological data given.    ADVANTAGE - The biomass digestion method provides biosolid and biogas composition, and liquid fertilizer composition in a simple and economical manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a biosolids composition obtained from the biomass digestion process comprising (a) providing a biomass as a feed stream, (b) aerobically hydrolyzing at least a portion of the feed stream to form volatile solids in solution comprised at least of simplified biomolecules, (c) transferring at least a portion of the feed stream after hydrolysis to an acidifying stage, (d) performing acidogenesis on at least a portion of the feed stream in the acidifying stage at a first temperature, (e) transferring the feed stream after acidogenesis to at least one additional stage, and (f) performing anaerobic digestion on at least a portion of the feed stream in the at least one additional stage at a second and higher temperature than the first temperature to form an effluent with decomposed solids and one or more biogases;    (2) a liquid fertilizer composition obtained from the biomass digestion process comprising the steps (a)-(f) as above per se; and    (3) a biogas composition obtained from the biomass digestion process.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of system and process for biomass digestion.    Hydrolysis phase (1)    Acidic phase (2)    Thermophilic phase (3)    Mesophilic phase (4)    Separation phase. (5)