4 Conclusions
In this work the process efficiency of oil extraction from
Coratina and Peranzana cultivars was evaluated by the
application of the ultrasound‐assisted extraction technique on
olive paste before the malaxation phase. Results demonstrated
that the thermal effect of ultrasounds led to a quick heating
of olive paste thus reducing the malaxing phase independently
from the different technological performance of the varieties.
The ultrasound treatment did not change the quality indices
of VOOs such as free acidity, peroxide value and K232 and
K270, whereas tocopherols, carotenoids, and chlorophylls
increased and polyphenols decreased. Concerning VOOs
sensory characteristics, the increase of sonication time did not