Food conservation by drying is a well-known method of extending shelf-life. It is
known that food, especially fruits and vegetables are particularly sensitive to thermal
treatment. Relevant changes are observed both in physical aspects (strength
parameters) and chemical composition of the product. Especially adverse changes
occur in vitamin and other nutrients content (Sagar and Suresh Kumar, 2010; Tunde-
Akintunde et al., 2005; Chou and Chua, 2001; Patel and Kar, 2012). For that reason,
scientists are interested in new technological solutions. For some time now, the use of
ultrasound, as a factor intensifying the drying process has raised considerable interest
among researches. Ultrasounds give the possibility to lower the temperature of the
process, and shorten the time of the process.