Microwave vacuum drying organic materials

An apparatus (20) for dehydrating organic material, comprising: (a) a vacuum chamber (34); @ (B) a microwave generator (50); (C) a microwave transparent (36) for transmitting microwave radiation from the microwave generator into the vacuum chamber window; (D) a microwave chamber (52) between the microwave generator and the window transparent to microwaves; and (e) means (60) for conveying the organic material through the microwave transparent window in the vacuum chamber wherein the means for transporting extend over the transparent window to microwaves and contact with microwave transparent window.