NOVELTY - Combustible waste material is thermally decomposed in gasifier (2), to obtain combustible gas and thermal decomposition residue. The thermal decomposition residue is burnt in combustion furnace (3) to obtain combustion exhaust gas. Water-containing organic sludge is dried, by making combustion exhaust gas as heat source, to obtain dried organic sludge. Thus, combustible waste material and water-containing organic sludge are processed.    USE - For processing combustible waste material and water-containing organic sludge, such as waste plastic. To produce combustible gas used as gas fuel for gas fuel utilization apparatus, such as cement kiln.    ADVANTAGE - The gas produced during processing is effectively reused. Combustible waste material and water-containing organic sludge are simultaneously processed with high thermal efficiency.    DETAILED DESCRIPTION - A combustible waste material is thermally decomposed in a gasifier, to obtain combustible gas and thermal decomposition residue. The combustible gas is used as gas fuel for gas fuel utilization apparatus. The thermal decomposition residue is burnt in combustion furnace, to obtain combustion exhaust gas. Water-containing organic sludge is dried, by making the combustion exhaust gas as heat source, to obtain dried organic sludge. Thus, combustible waste material and water-containing organic sludge are processed. An INDEPENDENT CLAIM is included for processing system of combustible waste material and organic sludge. The system consists of gasifier, combustion furnace, drying apparatus (11), combustion exhaust gas circulation path (10) for heating the water-containing organic sludge indirectly, gas fuel utilization apparatus and combustion gas circulation path (7,9) for supplying the gas fuel into the gas fuel utilization apparatus.    DESCRIPTION OF DRAWING(S) - The figure shows the processing system of combustible waste material and water-containing organic sludge. (Drawing includes non-English language text).    integrated furnace (1)    gasifier (2)    combustion furnace (3)    combustion gas circulation path (7,9)    combustion exhaust gas circulation path (10)    drying apparatus (11)