Integrated green extraction of phenolic compounds and fermentable sugars from grapefruit peel using ultrasound and enzymatic hydrolysis.

ABSTRACT:

Background

Valorizing sugar-rich food waste in biorefineries offers a sustainable route to bio-based products. Grapefruit peel (GP), representing about 50% of the fruit's weight, is rich in sugars (soluble and insoluble) and polyphenols such as flavonoids. The present study investigates an integrated green extraction strategy using high-intensity focused ultrasound (HIFU) and enzymatic hydrolysis (EH) to recover phenolic compounds and sugars from GP.

Results

Vacuum-drying preserved extractability and sugars release with the carbohydrases evaluated. Using dried GP at 10% (DW/v), EH incorporating lytic polysaccharide monooxygenases yielded >60 g L^-1 reducing sugars and 1-2.3 g L^-1 phenolics (gallic acid equivalents, GAE) after 24 h. Optimal HIFU condition

SUBMITTER: Garcia-Aparicio MDP 

PROVIDER: S-EPMC12790642 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature