The present invention is directed to a method for combining dehydrofreezing and medium to far spectrum infrared radiation to preserve biological material. IR transfers energy and penetrates food products, thereby removing naturally present moisture. The present invention provides a novel method of combining pH treatment, infrared radiation, freezing, and vacuum-sealing for preserving biological material. Biological materials are preserved through either a pH treatment or with heat to remove harmful pathogens, followed by processing using far spectrum infrared radiation which may be powered by either gas or electric means. The processed materials undergo a freezing process which may be done using Individual Quick Freezing or blast freezing methods The frozen processed material is then packaged via vacuum sealing.

A method for enzyme deactivation in raw produce involves a computer-controlled two-step heating process using microwave and infrared systems. Initially, a monolayer of raw produce is conveyed through a microwave oven, maintaining relative humidity below a threshold, to achieve a first average temperature. Subsequently, the produce is transferred to an infrared oven, where the relative humidity is kept above the threshold, resulting in a second average temperature that is equal to or greater than the first. The method ensures efficient enzyme deactivation by adjusting the respective depth of produce monolayers, the intensity and duration of microwave and infrared exposure, and controlling temperature and humidity levels during the heating process.