Recovery of ellagic acid from mexican rambutan peel by solid-state fermentation-assisted extraction

This study investigated the recovery ellagic acid (EA) obtained by solid-state fermentation (SSF) assisted extraction from Mexican Rambutan peel (Nephelium lappaceum L.). For the recovered compound, the influences of Aspergillus niger inoculum, temperature and moisture were evaluated. Maximum accumulation of EA, radial growth of the microorganism, water absorption capacity (WAC) of the rambutan peel and determination of best fermentation conditions were tested. The identification of recovered compounds and EA was performed by HPLC-MS. The total polyphenols (hydrolyzable and condensed assays) and antioxidant activity (ABTS and DPPH assays) were tested. The present study proposes a biotechnological alternative to obtain, from agro-industrial wastes, a high-added value compound using SSF. •Agro-industrial wastes used in the recovery of bio compounds.•Rambutan peel as source of ellagitannins.•Ellagic acid compound recovered by bioprocess extraction.•Solid-state fermentation extraction-assisted bioprocess.•Antioxidant activity of bio compounds from agro-industrial wastes.