Deconstruction of banana peel for carbohydrate fractionation

Author(s)

Pereira, Maria Angelica F. ^[1] ; Monteiro, Carla Roana M. ^[1] ; Pereira, Gabriela N. ^[1] ; Junior, Sidnei E. Bordignon ^[1] ; Zanella, Eduardo ^[2] ; Avila, Patricia F. ^[3] ; Stambuk, Boris U. ^[2] ; Goldbeck, Rosana ^[3] ; de Oliveira, Debora ^[1] ; Poletto, Patricia ^[1]

Affiliation

^[1] UFSC Fed Univ Santa Catarina, Dept Chem & Food Engn, Lab Biol Engn, BR-88040970 Florianopolis, SC - Brazil

^[2] Univ Fed Santa Catarina, Dept Biochem, Yeast Mol Biol & Biotechnol Lab, Florianopolis, SC - Brazil

^[3] UNICAMP Univ Campinas, Dept Fac Food Engn, Lab Bioproc & Metab Engn, BR-13083862 Campinas, SP - Brazil

• Document type: Journal article
• Source: Bioprocess and Biosystems Engineering; v. 44, n. 2, p. 297-306, FEB 2021.
• Web of Science Citations: 4

Abstract

The deconstruction of banana peel for carbohydrate recovery was performed by sequential treatment (acid, alkaline, and enzymatic). The pretreatment with citric acid promoted the extraction of pectin, resulting in a yield of 8%. In addition, xylose and XOS, 348.5 and 17.3 mg/g xylan, respectively, were also quantified in acidic liquor as a result of partial depolymerization of hemicellulose. The spent solid was pretreated with alkaline solution (NaOH or KOH) for delignification and release of residual carbohydrates from the hemicellulose. The yields of xylose and arabinose (225.2 and 174.0 mg/g hemicellulose) were approximately 40% higher in the pretreatment with KOH, while pretreatment with NaOH promoted higher delignification (67%), XOS yield (32.6 mg/g xylan), and preservation of cellulosic fraction. Finally, the spent alkaline solid, rich in cellulose (76%), was treated enzymatically to release glucose, reaching the final concentration of 28.2 g/L. The mass balance showed that through sequential treatment, 9.9 g of xylose, 0.5 g of XOS, and 8.2 g of glucose were obtained from 100 g of raw banana peels, representing 65.8% and 46.5% conversion of hemicellulose and cellulose, respectively. The study of the fractionation of carbohydrates in banana peel proved to be a useful tool for valorization, mainly of the hemicellulose fraction for the production of XOS and xylose with high value applications in the food industry. (AU)

• FAPESP's process: 19/08542-3 - Enzymatic biotechnology for the xylo-oligosaccharides production from lignocellulosic agroindustrial residues aimed the production of symbiotics
• Grantee: Rosana Goldbeck Coelho
• Support Opportunities: Regular Research Grants