Scientists at Nanyang Technological University (NTU) developed a sustainable method to convert kale waste into valuable bioactive compounds for health and personal care products. Using non-toxic, plant-based solvents called NADES, they extracted polyphenols, carotenoids, and chlorophylls without heat, preserving their potency. This energy-efficient process reduces food waste, lowers emissions, and offers a cost-effective solution for the industry. The technique is also scalable and adaptable for other vegetable and fruit wastes.
The process involves blending kale waste into a paste or powder and mixing it with a specially formulated, non-toxic natural deep eutectic solvent (NADES) at room temperature. The mixture is stirred mechanically, allowing the bioactive compounds to separate into layers. These compounds, such as polyphenols and carotenoids, are then extracted through filtration. This low-energy, heat-free method preserves the potency of the compounds and yields a stable, high-quality extract.
