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Valorization of rice husk by hydrothermal processing to obtain valuable bioproducts: xylooligosaccharides and Monascus biopigment

Astrid Corrales Centeno Salvador Sanchez-Muñoz; Igor Severo Gonçalves; Fabio Patricio Sanchez Vera; Marcus Bruno Soares Forte; Silvio Silverio da Silva; Julio Cesar dos Santos; Ruly Terán Hilares

Carbohydrate Polymer Technologies And Applications v.6, p.1-9, art. n.100358, 2023

Praga Elsevier 2023

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  • Título:
    Valorization of rice husk by hydrothermal processing to obtain valuable bioproducts: xylooligosaccharides and Monascus biopigment
  • Autor: Astrid Corrales Centeno
  • Salvador Sanchez-Muñoz; Igor Severo Gonçalves; Fabio Patricio Sanchez Vera; Marcus Bruno Soares Forte; Silvio Silverio da Silva; Julio Cesar dos Santos; Ruly Terán Hilares
  • Assuntos: BIOTECNOLOGIA; BIOQUÍMICA; QUÍMICA ANALÍTICA; Rice Husk; Xylooligosaccharides; Red Pigments
  • É parte de: Carbohydrate Polymer Technologies And Applications v.6, p.1-9, art. n.100358, 2023
  • Notas: Disponível em: https://doi.org/10.1016/j.carpta.2023.100358. Acesso em: 21 nov. 2023
  • Descrição: Rice husk is a readily available residue which can be used for producing bioproducts in a biorefinery context. In this study, the hemicellulose fraction was hydrolyzed in a hydrothermal process to produce xylooligosaccharides (XOS), whereas the cellulosic hydrolysate was used for red pigment production by Monascus ruber Tieghem IOC 2225. The highest XOS (X2-X4) production (24 g per 1 kg of rice husk) was achieved at 180 °C for 68 min in a non-stirred Parr reactor (50 mL). Subsequently, using a stirred parr reactor (1 L) at 180 °C for 60 min, 40 g of XOS (42% of xylobiose, 35% of xylobiose, 13% of xylotriose, 7% of xylotetraose, and 3% of xylopentaose) per 1 kg of rice husk were obtained. The XOS was then purified by using ultrafiltration (UF) with two diafiltration membranes at 6.5 pH, recovering approximately 92% of total XOS. Further purification was conducted with nanofiltration (NF) at 3.8 pH, recovering approximately 86.4% of XOS in the retentate. This process yielded XOS with a purity of 77%. Additionally, the enzymatic process yielded 132 g/kg of sugar, and the hydrolysate was used to produce 2.1 UA490nm of red pigment by fungi after 7 days.
  • Editor: Praga Elsevier
  • Data de criação/publicação: 2023
  • Formato: p. 1-9.
  • Idioma: Inglês
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