Olive (
Olea europaea
L.) oil processing produces significant amount of waste that can be utilized for the production of high
value-added ingredients for various industrial applications. In this work, the effects of temperature on drying kinetics and
quality indexes of the olive-waste cake during convective dehydration (40-90 °C) were investigated. Results on effective
moisture diffusivity, physicochemical parameters, fatty acid profile, total phenolic, flavonoid, and flavanol contents as well
as antioxidant capacity are also reported. Most of the fatty acids increased their content with respect to control sample with
a temperature increase, i.e. oleic and linoleic acids increased 48% and 43% at 70 and 40 °C, respectively. Total flavanol
content increased with temperature (48-62 mg catechin equivalents [CTE] 100 g
-1 DM) except for 80 °C. Total phenolic
and total flavonoid contents were highly correlated to antioxidant capacity (0.923 < r < 0.992), except for 70 and 80 °C, the
rest of the samples maintained their initial antioxidant capacity by ORAC analysis. Thus, these parameters show that dried
olive-waste cake has a high bioactive compounds with potential use as additives for the food or other industries.
