Use of dry yeast biomass as a new approach for detoxification of hemicellulosic hydrolysates aiming to xylitol production

Autor(es)

Jofre, Fanny Machado ^[1] ; Hernandez-Perez, Andres Felipe ^[1] ; dos Santos, Julio Cesar ^[1] ; de Almeida Felipe, Maria das Gracas ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biotechnol, Engn Sch Lorena EEL, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 170, OCT 15 2021.
• Citações Web of Science: 0

Resumo

The presence of toxic compounds in hemicellulosic hydrolysates is a bottleneck for biotechnological processes, such as xylitol production. In our work, a new approach was proposed for hemicellulosic hydrolysates detoxification by using the residual dry yeast biomass (DYB) from xylitol production bioprocess. Candida tropicalis biomass was recovered from fermentation process of a medium based on sugarcane bagasse and straw hemicellulosic hydrolysate (SBSH). The effects of influent variables on detoxification performance were investigated, and the removal of phenolic compounds, acetic acid, furfural and 5-hydroxymethylfurfural reached up to, respectively, 27.0 %, 26.7 %, 27.5 %, and 25.8 %. By using the SBSH detoxified at conditions of highest phenolics removal, fermentations (initial xylose concentration of 52 g L-1) were performed for xylitol production, resulting in a yield of 0.79 gg-1 and 86 % of conversion efficiency. Thus, the use of residual DYB is a potential alternative for detoxification of hemicellulosic hydrolysates, since recycling the biomass could reduce the expenditures with adsorbents. (AU)

• Processo FAPESP: 19/27092-9 - Biorrefinaria de produção de xilitol a partir de cana-de-açúcar: novas estratégias para viabilizar a rota biotecnológica
• Beneficiário: Maria das Graças de Almeida Felipe
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular