Valorizzazione di acque di vegetazione provenienti da oleifici tramite recupero di polifenoli per adsorbimento

The environmental problems associated to the disposal of the olive oil wastewater (OMW, Olive Mill Wastewaters), and the difficulty in the recycling because of their polyphenolic content, led to propose the separation of their polyphenols. The recovery of polyphenols from olive mill wastewaters (OMWs) provides the double opportunity to obtain high-added value biomolecules and to reduce the phytotoxicity of the effluent. The separation can be obtained by a continuous flow extraction process of adsorption and desorption, this process is characterized by the possibility to recycling the adsorbing phase and the extraction solvent. The present work is part of a project aimed to the development of pilot scale process based on the use of the AMBERLITE XAD16 as adsorption resin. The adsorption stage is preceded by a wastewater filtration pretreatment, and a final desorption process is added to recover the polyphenols using acidified ethanol as the solvent.