NOVELTY - The high-pressure water vapor is supplied into lower portion of a hydrothermal reactor (7) for treating crushed waste at a pressure in the range of 1-3MPa, at a temperature in the range of 190-220degreesC and for a time period for 30-90 min. The hydrothermal-reaction process liquid is oxidized using oxygen-containing gas. The oxidized liquid and a gas are separated in a cyclone (9).    USE - For processing organic waste such as human waste, purification-tank sludge and organic refuse, for manufacturing compost and carbonized material.    ADVANTAGE - Prevents mixing of impurities such as vinyl, plastics in the compost, thereby improving the quality of the compost and other products. Reduces running costs, by reducing labour costs and legal inspection charge.    DETAILED DESCRIPTION - The supply flow rate of the high-pressure water vapor to the hydrothermal reactor is controlled with a liquid-level control valve (20). A pair of pressure control valves (21,23) regulate the pressure inside the reactor. A temperature control valve (22) regulates the temperature in the reactor, by controlling the ejection amount of the process liquid from the reactor. The supply of the high-pressure water vapor is stopped when the pressure in the reactor is more than preset value. The hydrothermal-reaction process liquid is oxidized at a temperature of 160-190oC, pressure of 0.6-1 MPa and for a reaction time period in the range of 30-90 min. The concentration of oxygen in the oxygen-containing gas is 21-75 vol%. The reaction heat generated during hydrothermal reaction and the oxidization process is stored for heating the organic waste.    An INDEPENDENT CLAIM is also included for processing apparatus for organic waste.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of the processing apparatus for organic waste. (Drawing includes non-English language text).    crusher (3)    hydrothermal reactor (7)    oxidation-reaction tower (8)    cyclone (9)    liquid-level control valve (20)    pressure control valves (21,23)    temperature control valves (22)