Reduction of organic pollutants in Olive Mill Wastewater by using different mineral substances as adsorbents.

Physico-chemical treatments of Olive Mill Wastewater (OMW) were carried out using diVerent inorganic substrates such as soil, ben- tonite and zeolite, in order to assess their eYciency to remove the organic load from OMW, in particular polyphenols (Pp) and to reduce chemical oxygen demand (COD). The eVect of repeated treatments of OMW with diVerent minerals and the possibility of regenerating them by the Low Temperature Ashing (LTA) technique, an eco-friendly procedure, for the reutilization of treated OMW, has been inves- tigated. Zeolite was found to be highly eYcient in adsorbing Pp and COD from OMW and was easy to regenerate by means of the LTA technique.