Process control, microwave-assisted drying

Factors Controlling Microwave-Assisted Drying Processes... 

Microwave-Assisted Drying Process Control and Optimal Operation... 

Fig. 9.19 Controlling factors of microwave-assisted drying processes, and process intensification strategy.

Scanning electron micrographs taken from control (non-treated) and leaves that were previously treated by the extraction processes mentioned above revealed significant differences between the microwave-assisted extracted leaves and all other mint leaves which had been extracted by means. This was true for dry, fresh, and re-hydrated leaves. In fact, it was clear that the process by which the extraction occurs when using microwaves was fundamentally different from any other extraction processes investigated at the time. Actually, to the best of our knowledge, this assertion still holds true. In summary, the conclusions drawn from the micrographs taken from mint leaves that were subjected to extraction in hexane were as follows [1-6] ... 

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