| 摘要 |
PROBLEM TO BE SOLVED: To propose a process for a hydrothermal oxidation reaction, with which a safe and long-term operation is attained by reducing corrosion of a hydrothermal reactor and a low-cost operation is attained by reducing the amount of a neutralizing agent used. SOLUTION: A mixed waste liquid 13 is prepared by introducing an alkaline waste liquid through a route 11 and an organic substance through a route 12 into a mixing vessel 1 and mixing them. In this case, the organic substance is added so as to generate excessive carbon dioxide with respect to Z value expressed by an equation, Z=([Na]+[K]+[Mg]×2+[Ca]×2)-([F]+[Cl]+[Br]+[P]×3+[S]×2) (here [Na], [K]... represent molar concentrations (mol/l) of each atom contained in a liquid to be treated). The mixed waste liquid 13 is delivered to a supplying apparatus 2a of the hydrothermal reactor 2 and is mixed with an oxidizing agent. The mixed stream is supplied to the hydrothermal reactor 2 in a downward stream and the hydrothermal oxidation reaction is carried out. COPYRIGHT: (C)2003,JPO
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