| abstract |
(57) [Summary] [PROBLEMS] In a waste treatment using a high-temperature and high-pressure medium, inorganic substances in the waste precipitate in a reactor, which causes troubles such as closing a container port. The present invention provides a solution to this problem. SOLUTION: A low molecular weight reduction step of holding a mixture of an organic waste and a medium in a supercritical state for a predetermined time and reducing the molecular weight of all or most of the organic substances contained in the organic waste, An oxidizing step of mixing the product generated in the molecular weight reducing step with an oxidizing agent, maintaining the mixture in a subcritical state for a predetermined time, and oxidizing the waste. In a waste treatment method in which a mixture of an organic waste or an inorganic waste and a medium is maintained in a supercritical state for a predetermined time to decompose organic substances contained in the organic waste or inorganic substances contained in the inorganic waste, A waste treatment method wherein the hydrogen ion concentration is 10 -4 mol or more per 1 kg of the medium. |