| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for detoxification treatment of PCB-containing oil which detoxifies PCB on mild operating conditions and obtains a high detoxification ratio of the PCB using a small amount of chemical. <P>SOLUTION: The PCB-containing oil, ethanol, isopropanol, and metal calcium are continuously supplied to a treatment tank 41 by supply devices 11, 13, 15, and 17, respectively. In the treatment tank 41, they are agitated and mixed at 60°C using an agitator 45 and the PCB-containing oil and a solvent are rendered compatible, so that the PCB is detoxified while the PCB-containing oil and the solvent are rendered compatible. Thus, a high detoxification ratio of the PCB is achieved with a small amount of the solvent. The matter having been detoxified in the treatment tank 41 is cooled down to 20-30°C by a cooler 53 and thereafter sent to a phase separation tank 55. In the phase separation tank 55, the treated matter is left at rest to phase-separate into a solvent phase and an oil phase. Thus, a treated oil and the solvent are simply recovered. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
