Ex Situ Microwave or Radio Frequency Thermal Desorption

This process reactor is similar to a household microwave oven. The microwave dryer consists of a chamber that is connected to a microwave generator by wave guides. The contaminated

Situ Diagram Simple
Figure 3 In situ thermal extraction process diagram. (Courtesy of USEPA.)

soil or hazardous wastes are placed into the chamber, and the radio frequency radiation is focused on them by the wave guides. By using microwaves, the heating energy is focused inside the soil particles, achieving better thermal desorption efficiency. Also, the microwave generator can be remotely controlled without exposing workers to a contaminated environment. This type of thermal desorption unit is in the developmental stage because scaling up is not cheap [19,25].

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