Pressurized liquid extraction applied for the recovery of phenolic compounds from beetroot waste

Beetroot (Beta vulgaris L.) residues, leaves and stems, normally disposed as animal feed or compost, were investigated for the recovery of valuable compounds by pressurized liquid extraction (PLE) at temperature of 40 °C and pressures of 7.5, 10 and 12.5 MPa, and flow rate of 3 mL min-1. This abundant residue, combined with the lack of related studies of beetroot waste by applying the PLE methods to obtain bioactive extracts is the main novelty...