Ultrasound treatment is connected to drying during the process
and as a preliminary treatment positively affects the drying process in
terms of improving the quality of the dried products and reducing the
energy consumed during drying.
Ultrasound can be applied to improve the convective heat transfer coefficient to accelerate freezing rates during freezing of potatoes or to increase mass transfer for different products and processes such as brining
of meat and cheese.
However, although ultrasound treatment can be
used in many ways to accelerate drying processes, it has not been connected with
vacuum drying.
Therefore, in the present study, ultrasound and vacuum processes were combined as a novel drying technique.