A Sustainable Method for Potato Side Stream Valorisation to Obtain Steroidal Glycoalkaloids within a Bioeconomy Approach

Abstract

This study explores potato side-streams as a source of valuable natural products, specifically steroidal glycoalkaloids (SGAs). A bioeconomic approach was envisioned to valorize these plant materials without affecting food streams. The results show that cell disruption with a swing mill is more efficient than using a blender. The potato variant Innovator displayed the highest SGA content, while flowers showed higher levels compared to leaves and berries. A comprehensive analysis of the E-factor and E+-factor was conducted to assess sustainability. The results indicate that extraction with hydrolysis is a more environmentally friendly method, particularly when using fresh plant material. The study concludes that potato side-streams can be valorized without affecting food streams, providing opportunities for natural products with potential applications in agriculture and beyond.