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Journal of Biotechnology
Volume 364, 2023, Pages 5-12

Bioprocessing of oilseed cakes by fungi consortia: Impact of enzymes produced on antioxidants release

Daniel Sousaa,c,d, José Manuel Salgadoa, Maria Cambra-Lópezb

Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.

Abstract

Oilseed cakes (OC) present high potential as feedstock for the biobased industry. Biotechnological processes allow OC valorization by the production of diverse value-added products and simultaneously altering OC structure, improving their nutritional value, and boosting OC utilization in animal feed. This work explored the use of fungi consortium of two different species as a bioprocessing approach to improve the nutritional quality of OC, obtain enzymes and antioxidants by solid-state fermentation (SSF) of sunflower cake (SFC) and rapeseed cake (RSC). Rhyzopus oryzae and Aspergillus ibericus consortium led to the highest production of cellulase (135 U/g) and β-glucosidase (265 U/g) while maximum protease (228 U/g) was obtained with A. niger and R. oryzae consortium. Maximum xylanase production (886 U/g) was observed in SSF of RSC resulting in high hemicellulose reduction. The synergistic action of lignocellulosic enzymes resulted in extracts with increased antioxidant potential with possible application as food additives against oxidative stress.

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