METHOD AND APPARATUS FOR DECOMPOSING ORGANIC WASTE AT HIGH SPEED

摘要

PROBLEM TO BE SOLVED: To decompose organic waste such as an organic acid generated from biotic waste without using a catalyst while the generation of smoke and a bad smell is decreased. SOLUTION: The subject to be decomposed is decomposed without using the catalyst by mixing the subject to be decomposed, a solvent and air, heating the mixture at 550 deg.C or lower temperature to generate superheated steam of around 0.1-0.5 MPa pressure and making the generated superheated steam pass through a reaction tube after the prescribed time. Persistent organic matter and organic waste are oxidized and decomposed by using water as the solvent and combining all or any of the oxidation reaction by oxygen in the air and the drying, hydrolysis reaction and thermal decomposition reaction by the superheated steam. The generation of smoke and the bad smell owing to the thermal decomposition of the decomposed materials is decreased by bringing the superheated steam into countercurrent contact with the air separately heated to 550 deg.C or lower temperature to obtain other superheated steam containing a small amount of air being <=1 air ratio and promoting the dissolution of the decomposed materials in the obtained superheated steam.