**3. Results and discussion**

Both systems allow the utilisation of the final solid for crude olive-pomace oil extraction. These COPOs have been characterised to assess the positive and negative effects of both treatments on its composition. The SES was studied as a commonly used method for lignocellulosic materials, and the ST was designed to simplify the first system and to diminish the negative effects of SES on crude olive-pomace oil. The lipid fraction of POO extracted from solids treated with either treatment was evaluated, and the minor components were also characterised, in the case of the ST.
