NOVELTY - The non-stirred static solid state bioreactor comprises a gas tight vessel (10) such as hollow body having an upper end and a conically shaped lower end, a gas distribution or delivery system (30) present in communication with the upper and lower ends of the vessel, a liquid distribution system (50) present in communication with the upper end of the vessel, a liquid recovery system (70) present in communication with the lower end of the vessel, and a material removal system (90) disposed at the lower end of the vessel for removing biomass residue from the vessel.    USE - The non-stirred static solid state bioreactor is useful for performing static solid state fermentation of biomass for producing a gaseous fuel from a biomass material (all claimed), where: the static solid state fermentation is useful in the preparation of traditional fermented foods; the biomass is useful as feedstock for producing fossil fuel substitutes and includes living and recently dead biological material including carbohydrates, proteins and/or lipids, plant matter, biodegradable solid waste such as dead trees and branches, yard clippings, recycled paper, recycled cardboard, wood chips, plant animal matter and other biodegradable wastes; and the gaseous fuel is ethanol and/or methane.    ADVANTAGE - The static solid state bioreactor is economical to construct and operate, is capable of efficiently performing the static solid state fermentation of biomass without proliferation of undesirable microorganisms, ensures economic production of the gaseous fuel from the biomass material with increased yield and without carbon pollution and the production of unwanted products, and increases and maintains the hydraulic conductivity of the biomass.    DETAILED DESCRIPTION - The non-stirred static solid state bioreactor comprises a gas tight vessel (10) such as hollow body having an upper end and a conically shaped lower end, a gas distribution or delivery system (30) present in communication with the upper and lower ends of the vessel, a liquid distribution system (50) present in communication with the upper end of the vessel, a liquid recovery system (70) present in communication with the lower end of the vessel, and a material removal system (90) disposed at the lower end of the vessel for removing biomass residue from the vessel. The vessel: is sealed; further comprises openings located on a lateral surface of the lower end and a material removal port; is adapted for stacking biomass; and is configured for anaerobic bioreactor operation. The stacked biomass is stored within the hollow body under conditions for fermentation. The lower end is perforated to allow a flow of gas and a liquid through the stacked biomass. The upper end has a sealable opening for stacking of biomass within the hollow body. The gas distribution system and the liquid recovery system communicate with the vessel at the lower end through the openings. The biomass openings are located at an apex of the lower end. The material removal system: further comprises an auger driven by a motor; is operatively provided within the hollow body at the lower end; and is configured to direct the flow of decomposed biomass material towards the passageway during unloading of the hollow body. The auger protrudes into the vessel through the opening at the apex and extends up towards a perimeter of a base of the conically shaped lower end. The static solid state bioreactor further comprises: wedge wire screens that are disposed on the lower end of the vessel, are configured to fit within one of the openings and cover one of the openings in the lower end of the vessel; a passageway for removal of decomposed biomass material at the lower end of the hollow body; an irrigation system disposed within the hollow body proximate to the upper end of the vessel and configured to irrigate the stacked biomass; gas ports present in communication with the gas distribution system and present in communication with the openings in the lower end of the vessel; liquid ports present in communication with the liquid collection system and in communication with the openings in the lower end of the vessel; manifolds disposed to connect the openings with the gas ports and the liquid ports; and a unit for treating the effluent discharge to improve quality before recycling. The gas distribution or delivery system comprises: a fan; a first duct present in communication with the upper end of the vessel and the fan; a second duct present in communication with the lower end of the vessel and the fan; and a valve present in communication with the fan, is coupled to the upper end and the lower end of the hollow body, and is configured to flow gas through the stacked biomass from the lower end to the upper end and from the upper end to the lower end. The valve selectively connects an intake and an output from the fan to the first duct and the second duct and changes a direction of a gas flow through the vessel. The liquid recovery system is adapted for collecting a liquid effluent that drains from the stacked biomass operatively provided proximate to the perforated lower end, and is present in communication with the liquid distribution system, where the liquid effluent from the bioreactor is recycled. The wedge wire screens comprise wires oriented to run towards a direction of material removal. One gas port of the gas ports is located above one liquid port of the liquid ports on one manifold of the manifolds. The liquid effluent is treated by a physical unit and a chemical unit before recycling. A mixture of biomass and bulking agent is disposed within the gas tight vessel. A microorganism supporting environment is maintained by balancing a counter-current flow of gas through the mixture from the gas distribution system with a counter-current flow of fluid through the mixture from the liquid distribution system to the liquid recovery system. A hydraulic conductivity of the mixture is maintained by greater than 104 cm/sec, and limits the gas flow back-pressure to less than 200 mm of water head. INDEPENDENT CLAIMS are included for:    (1) a method of performing static solid state fermentation; and    (2) a method of producing a gaseous fuel from a biomass material.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a bioreactor for performing static solid state saccharification and/or fermentation of biomass.    Vessel (10)    Gas distribution system (30)    Liquid distribution system (50)    Liquid recovery system (70)    Material removal system. (90)