Treatment device and treatment method for the organic waste

Treatment apparatus for organic waste, are provided wherein: a reaction container (34) for supplying and decomposing organic waste and for removing decomposed organic waste as a treated fluid; wherein the reaction vessel (34) comprising: an inner container (7) made of corrosion resistant material; an outer container (6), which consists of pressure-resistant material, and is arranged so as the inner container (7) with a gap surrounding therebetween; and a connecting pipe (8) for connecting the gap and the inner container (7) to each other outside the outer container (6), thereby the interior of the gap and the inside of the inner container (7) in substantially the same pressure set; wherein said inner container (7) comprises a heating zone (3) for heating of the supplied organic waste to a temperature which is higher than the critical point of water, a reaction zone (4) for holding and decomposing the organic waste at a temperature ...