The obtained results evidenced a significantly positive effect of
calcium carbonate on the extracting effectiveness of olive oil. The
optimal levels and particle size depended on the degree of ripening
of the starting olives; in particular, for less ripened olives, 1-2% of
Calcipur5 significantly increased the extraction yield of 4.0–4.9%,
whereas for more ripened olives a significant increase of extraction
effectiveness was obtained with 4% of calcium carbonate irrespective
of its particle size. In any case, Calcipur5 at 2% level allowed
to increase significantly the extracting effectiveness irrespective to
the degree ripeness of olives. The effect of calcium carbonate on
the main chemical, physical, and sensory quality indices did not
show a clear trend and could not be clearly pointed out.