NOVELTY - Biomass containing waste material is heated at 80-100degreesC and methane gas is recovered by methane-fermentation process. The residue produced is heated at 140-280degreesC and carbide material (14) and methane gas are recovered by low-temperature carbonization process. Further, the residue produced by above process is heated at 300-580degreesC and carbide material and hydrogen gas are recovered by high-temperature carbonization process.    USE - For processing biomass resources containing waste material.    ADVANTAGE - The composite methane-fermentation carbonization method enables recovering methane gas, carbide material and hydrogen gas efficiently and economically, without producing residue.    DETAILED DESCRIPTION - Biomass resources contains waste materials, such as plant, livestock products, fish-and-shellfishes, organic refuse and excreta of livestock products. The biomass resources are heated at 80-100degreesC and methane gas is recovered by methane-fermentation process. The residue produced is heated at 140-280degreesC and carbide material and methane gas are recovered by low-temperature carbonization process.    Further, the residue produced by above process is heated at 300-580degreesC and carbide material and hydrogen gas are recovered by high-temperature carbonization process.    An INDEPENDENT CLAIM is also included for composite-type methane-fermentation carbonization system (1) comprising a methane-fermentation unit (2), a low-temperature carbonization unit (3) and a high-temperature carbonization unit (4).    DESCRIPTION OF DRAWING(S) - The figure shows the flowchart of the composite-type methane-fermentation carbonization system. (Drawing includes non-English language text).    composite-type methane-fermentation carbonization system (1)    methane-fermentation unit (2)    low-temperature carbonization unit (3)    high-temperature carbonization unit (4)    gas converter (7,11)    electric power generation unit (8)    hydrogen fuel cell (12)    carbide material (14)