| Autor: |
Astrid Corrales Centeno, Salvador Sanchez Muñoz, Igor Severo Gonçalves, Fabio P. Sanchez Vera, Marcus B. Soares Forte, Silvio S. da Silva, Júlio C. dos Santos, Ruly Terán Hilares |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Carbohydrate Polymer Technologies and Applications, Vol 6, Iss , Pp 100358- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2666-8939 |
| DOI: |
10.1016/j.carpta.2023.100358 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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