NOVELTY - Diverse pulp and paper materials are treated by saturating the diverse pulp and paper materials with steam at sufficient temperature and pressure to expand the physical and chemical structure of the materials, while agitating the materials; depressurizing the vessel; and discharging the processed products from the vessel.    USE - For the treatment of diverse pulp and paper materials, including such products contained in municipal solid waste (MSW) and biohazardous wastes, to produce a homogeneous cellulosic product that can be used as a combustion fuel, refined for inclusion in composite materials or drilling fluids, and/or converted into other fuels, chemicals, fertilizers, or other useful products.    ADVANTAGE - The novel method is not only concerned with depletion rates of the finite sources of fossilized biomass materials and reduction of the generation of excess carbon dioxide and organic chemicals released from the burning or consumption such fossil materials, but also with the reduction in the volume of unused and discarded MSW and biohazardous wastes.    DETAILED DESCRIPTION - Treatment of diverse pulp and paper materials to produce a homogeneous cellulosic product involves:    (a) feeding diverse pulp and paper materials into a vessel (10);    (b) introducing steam into the vessel while agitating the materials;    (c) purging gases from the vessel through a vent valve while agitating the materials;    (d) capturing and treating the gases to render any volatile organic compounds and any other air pollutants present in the gases harmless;    (e) sealing the vessel, so that the vessel is pressure tight;    (f) saturating the materials with steam at sufficient temperature and pressure to expand the physical and chemical structure of the materials, while agitating the materials;    (g) depressurizing the vessel to further enhance the physical and chemical expansion of the materials; and    (h) discharging the processed products from the vessel.    DESCRIPTION OF DRAWING(S) - The figure is a schematic view of a process vessel used as above    Vessel (10)