Valorization of Gelidium corneum by-product through solid-state fermentation

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Ferreira, M (Author) Other; Salgado, JM (Author) Other; Peres, H (Author) FCUP; Belo, I (Author) Other

Journal

Title: Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C

Vol. 146

Pages: 205-212

ISSN: 0960-3085

Publisher: Institution of Chemical Engineers

Indexing

ISI Web of Knowledge - 0 Citations

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Other information

Authenticus ID: P-010-G3V

DOI: 10.1016/j.fbp.2024.05.014

Abstract (EN): Red seaweed Gelidium is used for agar extraction, generating large quantities of by-products (red seaweed byproduct - GBP). Its carbohydrate and protein-rich composition makes it a suitable substrate to produce valueadded compounds through solid-state fermentation (SSF). For the first time, GBP was used in SSF with Aspergillus ibericus and Aspergillus niger for carbohydrases production and protein enrichment. SSF was performed with unsupplemented GBP, supplemented with Mandel salt solution, and mixed at equal dry mass proportion with plant feedstuffs and with the seaweed Ulva rigida. A. niger CECT 2915 was the best strain under SSF obtaining the maximum xylanase activity (498 +/- 49 U g-1), in GBP mixed with sunflower cake and the maximum of cellulase activity (382 +/- 37 U g-1) in GBP mixed with rapeseed cake. In these mixtures, protein content increased 1.2-fold by SSF, as well as in GBP mixed with rice bran (1.3-fold). Scale-up of SSF using GBP mixed with sunflower cake from flasks to tray-type bioreactors demonstrated SSF reproducibility, achieving similar xylanase and cellulase activities. In the stirred-drum bioreactor, aeration and low agitation favored both enzymes production. Bioprocessing of GBP with plant feedstuffs using SSF was a cost-effective strategy to produce high-value enzymes, valorizing this seaweed by-product.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8