NOVELTY - The reactor comprises a vessel (12) capable of receiving, containing and discharging an organic waste in an airtight environment, and a pump present in communication with the vessel for evacuating the vessel to facilitate anaerobic digestion. The vessel includes a solar concentrator to focus light energy into the organic waste, an opening to facilitate loading and unloading of the vessel with the organic waste, a lid (16), and a feed through radio frequency antenna capable of emitting radio frequency energy into the organic waste.    USE - The reactor is useful for producing methane gas through anaerobic digestion of an organic waste feedstock (claimed) such as compost and animal manure and an inorganic waste feedstock, where the methane gas is useful as fuel to provide electrical energy.    ADVANTAGE - The reactor is capable of effectively and economically producing the methane gas through anaerobic digestion in an environmental friendly manner.    DETAILED DESCRIPTION - The reactor comprises a vessel (12) capable of receiving, containing and discharging an organic waste in an airtight environment, and a pump present in communication with the vessel for evacuating the vessel to facilitate anaerobic digestion. The vessel includes a solar concentrator to focus light energy into the organic waste, an opening to facilitate loading and unloading of the vessel with the organic waste, a lid (16), and a feed through radio frequency antenna capable of emitting radio frequency energy into the organic waste. The solar concentrator includes a Fresnel lens, and is capable of directing light energy into the organic waste. The Fresnel lens is secured in the lid and positioned between transparent protective sheets. An INDEPENDENT CLAIM is included for a method for producing methane gas through anaerobic digestion of an organic waste feedstock.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic side view of an anaerobic digester.    Vessel (12)    Lid (16)    Retractable solar reflector (17)    Solar concentrator assemblies (24, 26, 28)    Heating tube. (32)