Table 7. Price of Different Phenols Obtained.

	obtained from	price (€/kg)	reference
hydroxytyrosol	adsorption	300	(66)
tyrosol	adsorption	100	(67)
hydroxytyrosol/tyrosol	membrane	85	(68)
oleuropein	adsorption	850	(69)
oleuropein	membrane	45	(70)