NOVELTY - An energy-recovery system consists of a crusher (1), a solubilizer (2), a mixer (3), a methane-fermentation tank (4), a co-generation system (5), a dehydrator (6), and a drier (7). The crusher crushes the foodstuffs waste material and discharges as a waste-material slurry. The high-temperature high-pressure steam discharged from the co-generation system is supplied to the solubilizer, drier, and methane-fermentation tank and respectively used for production of solubilizate, drying of dewatered sludge, and heat-retention of methane-fermentation tank.    USE - System is used for recovering energy from foodstuffs waste material, and sludge generated from sewage works and disposal plants of industrial wastewater.    ADVANTAGE - The system produces electric power, heat, dried sludge which can be used as compost, and biogas with high yield, exhibiting favorable energy balance.    DETAILED DESCRIPTION - An energy-recovery system consists of a crusher (1), a solubilizer (2), a mixer (3), a methane-fermentation tank (4), a co-generation system (5), a dehydrator (6), and a drier (7). The crusher crushes the foodstuffs waste material and discharges as a waste-material slurry. The solubilizer solubilizes the sludge by contacting with high-temperature high-pressure steam and discharges as solubilizate. The mixer mixes the waste-material slurry and solubilizate, and discharges as mixed slurry. The methane-fermentation tank carries out methane fermentation of the mixed slurry, and produces and discharges biogas and digested sludge heat-retained at preset temperature. The co-generation system generates electric power and high-temperature high-pressure steam by using the discharged biogas as fuel. The dehydrator dehydrates the digested sludge discharged from the methane-fermentation tank, and discharges as dewatered sludge. The drier dries the dewatered sludge with high-temperature high-pressure steam. The high-temperature high-pressure steam discharged from the co-generation system is supplied to the solubilizer, drier, and methane-fermentation tank and respectively used for production of solubilizate, drying of dewatered sludge, and heat-retention of methane-fermentation tank.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the energy recovery system. (Drawing includes non-English language text)    Crusher (1)    Solubilizer (2)    Mixer (3)    Methane-fermentation tank (4)    Co-generation system (5)    Dehydrator (6)    Drier (7)