Biochemical conversion of sugarcane straw hemicellulosic hydrolyzate supplemented with co-substrates for xylitol production

Autor(es)

Hernandez-Perez, A. F. ^[1] ; Costa, I. A. L. ^[1] ; Silva, D. D. V. ^[1] ; Dussan, K. J. ^[1] ; Villela, T. R. ^[1] ; Canettieri, E. V. ^[2] ; Carvalho, Jr., J. A. ^[2] ; Soares Neto, T. G. ^[3] ; Felipe, M. G. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Lorena, Dept Biotecnol, BR-12602810 Sao Paulo - Brazil

^[2] Univ Estadual Paulista, Dept Engn, BR-12516410 Sao Paulo - Brazil

^[3] Inst Nacl Pesquisas Espaciais, Lab Associado Combustao & Prop, BR-12630970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 200, p. 1085-1088, JAN 2016.
• Citações Web of Science: 9

Resumo

Biotechnological production of xylitol is an attractive route to add value to a sugarcane biorefinery, through utilization of the hemicellulosic fraction of sugarcane straw, whose availability is increasing in Brazil. Herein, supplementation of the sugarcane straw hemicellulosic hydrolyzate (xylose 57 g L-1) with maltose, sucrose, cellobiose or glycerol was proposed, and their effect as co-substrates on xylitol production by Candida guilliermondii FTI 20037 was studied. Sucrose (10 g L-1) and glycerol (0.7 g L-1) supplementation led to significant increase of 8.88% and 6.86% on xylose uptake rate (1.11 g L-1 h(-1) and 1.09 g L-1), respectively, but only with sucrose, significant increments of 12.88% and 8.69% on final xylitol concentration (36.11 g L-1) and volumetric productivity (0.75 g L-1 h(-1)), respectively, were achieved. Based on these results, utilization of complex sources of sucrose, derived from agro-industries, as nutritional supplementation for xylitol production can be proposed as a strategy for improving the yeast performance and reducing the cost of this bioprocess by replacing more expensive nutrients. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/27142-0 - Desenvolvimento de plataforma tecnológica para incorporação da palha de cana-de-açúcar em uma biorrefinaria: produção de xilitol e energia
• Beneficiário: Maria das Graças de Almeida Felipe
• Modalidade de apoio: Auxílio à Pesquisa - Regular