NOVELTY - Digesting organic waste includes providing a source of organic material undergoing anaerobic bacterial digestion in a liquid phase within a liquids digestion vessel (5); providing a reception vessel (2) for receiving organic waste materials; feeding organic waste material containing biodegradable solids to a solids digestion vessel (3); feeding a part of the liquid phase to the reception vessel; separating solids materials to produce a high-nutrient plant-growth material; feeding liquid from the solids digestion vessel to the liquids digestion vessel; and removing inorganic particles.    USE - Method for digesting organic waste (claimed).    ADVANTAGE - The method allows a user to select whether to produce a high-nutrient plant growth medium, or a fibrous, low-nutrient, material for use as a plant growth medium, a solid fuel, or a building material. Liquid obtained during preparation of the low-nutrient material is used to produce useful methane. The method has reduced operating cost by removing grit from the solids digestion vessel and the liquids digestion vessel, and provides the ability to use a higher rate or faster methane-generating digester.    DETAILED DESCRIPTION - Digesting organic waste comprises:    (A) providing a source of organic material undergoing anaerobic bacterial digestion in a liquid phase within a liquids digestion vessel (5);    (B) providing a reception vessel (2) for receiving organic waste materials;    (C) feeding organic waste material containing biodegradable solids from the reception vessel to a solids digestion vessel (3);    (D) feeding a part of the liquid phase from the liquids digestion vessel to the reception vessel;    (E) after a predetermined time, separating solids materials above a specified size from other materials in the solids digestion vessel to produce a high-nutrient plant-growth material;    (F) optionally further dewatering some of the separated solids materials to produce a fibrous low-nutrient material and feeding some of the liquid from the dewatering process to the digestion vessel(s), preferably the liquids digestion vessel;    (G) feeding some liquid from the solids digestion vessel to the liquids digestion vessel; and    (H) removing inorganic particles from each of the digestion vessels.    INDEPENDENT CLAIMS are included for:    (1) use of fluids from the solids digestion vessel as a feed material for the production of hydrogen gas by anaerobic digestion, as a feedstock for a catalytic process, as a feedstock for a fuel cell, and as a feedstock for an anaerobic or aerobic digester; and    (2) an apparatus for digesting organic waste.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram of the method for digesting organic waste.    Reception vessel (2)    Solids digestion vessel (3)    Anaerobic digestion vessel (4)    Liquids digestion vessel (5)    Pipework (6)