| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for treating a container that can be treated in a storage place in a large-sized high concentration instrument that is not easy to carry and is extremely hard to treat, and to provide a treatment device.SOLUTION: A method for treating a large-sized instrument contaminated with PCB is characterized by performing in parallel: a cleaning step of, while performing the circular cleaning of the inside of the large-sized instrument 1 contaminated with PCB by using a cleaning liquid, suitably extracting a predetermined amount of the cleaning liquid into a first buffer tank 2 from the cleaning liquid in use for cleaning, and newly supplying the cleaning liquid to the large-sized instrument 1 after the cleaning liquid is extracted to perform the circular cleaning; and a decomposition treatment step of transferring a part of the extracted cleaning liquid from the first buffer tank 2 to a feed liquid tank 3 for storing the cleaning liquid, adding an alkali to the cleaning liquid in the feed liquid tank 3, and then, while circulating the cleaning liquid through a catalyst filled device 4 that is filled with a PCB decomposition catalyst, irradiating the cleaning liquid with a microwave by a microwave treatment device 5 to decompose the PCB in the cleaning liquid, and returning the cleaning liquid circulated through the catalyst filled device to a treated liquid tank 6. A treatment device is used for the method for treating the large-sized instrument contaminated with PCB. |
