Fecha de publicación: 15/06/2022 Fuente: Wipo "olive oil" The present invention relates to the use of a by-product of the olive oil production, particularly the use of the liquid fraction of an olive mill solid waste digestate in fertirrigation treatments. The process comprises several steps which include removal of olive stone pieces from olive mill solid waste, anaerobic digestion of the olive mill solid waste after the olive stone removal and centrifugation of the digestate resulting from the previous step followed by solid - liquid separation.