Abstract: An apparatus and a method of drying and/or treating loose products such as food products, for example corn, flour, seeds in general, spices, tea and coffee, dried pulses, dried or shelled fruit, like hazelnuts, dry food products in general, such as dried mushrooms, etcetera, the treatment which the aforementioned loose products can be subjected to being of the type such as disinfestation, sanitization, pasteurisation, sterilisation, etcetera, wherein the aforementioned apparatus comprises a conveyor for the loose products, a treatment unit defining a treatment chamber, means for generating radio frequency electromagnetic radiation, means for applying radio frequency electromagnetic radiation and/or microwaves which act in the treatment chamber or area and designed to affect the loose products transported through the treatment chamber or area, mixing means for the loose products to be treated arranged in the treatment chamber.