In recent years, we have witnessed an increase in areas planted with olives, and at the same time the technology of processing has changed significantly, and with it the amount and composition of olive growing by-products. Slovenian olive growers and olive processing units managers face major problems in the further use of by-products, as they are classified as waste according to the current legislation. Expert bases have been prepared for the possible further use of olive production by-products, which are presented in the report and will be the basis for legal regulations and a further strategy for the use of olive pomace.
D.08 Management and development of research activities
COBISS.SI-ID: 304820736Slovenia has placed the circular economy among its national strategic development and economic priorities. The circular economy, which focuses on the reuse of existing materials and products, is also an opportunity for by-products from olive production. By-products from olive production are classified as waste under current Slovenian legislation, but the results of numerous studies have shown that these can be evaluated and reused. The guidelines present the possible use of olive pomace as a soil improver, for animal feed and for the preparation of extracts rich in phenolic compounds for the preparation of food supplements.
F.10 Improvements to an existing technological process or technology
COBISS.SI-ID: 304821504Various types of olive byproducts as a non-ruminant animal feed are described
B.03 Paper at an international scientific conference
COBISS.SI-ID: 4236168The improved ultrasound assited extraction of oleuropein giving higher yields from olive leaves and stabilization of extracted oleuropeine in form of encapsulation is described
B.03 Paper at an international scientific conference
COBISS.SI-ID: 4817528In nature the excessive quantities of olive leaves and cake as by-products in the production of oil represent an ecological problem as they can inhibit the activity of microorganisms present in the environment due to the presence of phenolic compounds. Because of the compounds contained in olive leaves and cake and due to their favorable effects on the utilization of nutrients, they could be used as animal feed. The main objective of the study was to examine the influence of olive leaves and cake on the utilization of nutrients and energy in pigs. 24 growing pigs were included in the balance test and divided into three experimental groups. The first group was a control group (Kont), the diet of the second group was supplemented with 7.5% of dried olive leaves (Listi) and the third group was supplemented with 7.5% of dried olive cake (Tropine). During the experiment we monitored the feed intake and the excretion of nutrients with feaces and urine. The results showed that olive leaves and cake in compound feed adversely affected the daily growth and final weight of the animals. Animals that had leaves or cake in their diet digested dry matter, organic matter and gross energy less efficiently, while crude fat digestion was only worse with the feed containing leaves. Digestion and the utilization of crude protein were also negatively affected. The cake also had negative effects on digestion of neutral detergent fibre and acid detergent fibre. Olive leaves had negative effects on the digestion of Ca and Cu, while the digestion and utilization of Cu were also negatively affected in the group with olive cake.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 4272008