NOVELTY - A hydrothermal-processing tank (1) performs hydrothermal-process on organic waste using sodium hydroxide. A liquid separation device (2) separates the liquid component from the processed material. A heating separation unit separates the gas component by heating liquid component in pressure reduction atmosphere. A cooler (4) cools the discharged gas component and used as condensed water.    USE - For processing organic waste such as sludge.    ADVANTAGE - The foaming component and dark brown component resulting from hydrothermal process are removed effectively. The transparency of processed water of activated sludge treatment is improved. The fall of efficiency of activated sludge treatment is suppressed.    DETAILED DESCRIPTION - An anaerobic-treatment tank (5) performs anaerobic-treatment of condensed water using microorganisms. An activated-sludge-treatment tank (6) performs activated sludge treatment of the processed material discharged from anaerobic-treatment unit. A boiler (7) generates steam used for hydrothermal reaction by using a fuel methane gas generated by anaerobic-treatment unit. An INDEPENDENT CLAIM is included for organic-waste processing method involves performing hydrothermal-process on organic waste using sodium hydroxide. The liquid component is separated from the processed material. The gas component is separated by heating liquid component in pressure reduction atmosphere. The discharged gas component is cooled and used as condensed water. An anaerobic-treatment process is performed on condensed water using microorganisms. An activated sludge treatment process is performed on the processed material discharged from anaerobic-treatment unit. The hydrothermal reaction is performed by using the steam generated by boiler and a fuel methane gas generated by anaerobic-treatment unit.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of the organic-waste processing apparatus. (Drawing includes non-English language text)    Hydrothermal-processing tank (1)    Liquid separation device (2)    Cooler (4)    Anaerobic-treatment tank (5)    Activated-sludge-treatment tank (6)    Boiler (7)