期刊
BIORESOURCE TECHNOLOGY
卷 342, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125970
关键词
Integrated biorefinery; Renewable nanomaterials; Bioproducts; Disc ultra-refining; Multi-product biorefinery
资金
- FAPESP [2015/02862-5]
- CNPq [308715/2015-2, 429895/2016-0]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
An integrated biorefining strategy was used to fractionate Sugarcane bagasse into high-value coproducts, including xylooligosaccharides and cellulose nanofibrils. Ethanol production from the cellulose hydrolysate reached a high concentration with a conversion yield of 0.48 g/g and productivity of 1.40 g/L.h.
An integrated biorefining strategy was applied to fractionate Sugarcane bagasse (SCB) into its major constituents, enabling high-yield conversion of the fractionated materials into high-value coproducts alongside cellulosic ethanol. Pilot-scale steam explosion produced a hydrolysate rich in low molecular weight xylooligosaccharides that had a high in vitro efficacy as a prebiotic towards different bifidobacteria. Lignin recovered after alkaline treatment of the steam-exploded SCB was converted into uniform spherical lignin nanoparticles (11.3 nm in diameter) by a green mechanical method. The resulting cellulose was hydrolyzed at 17.5% (w/v) consistency and low enzyme loading (17.5 mg/g) to yield a pure glucose hydrolysate at a high concentration (100 g/L) and a cellulosic solid residue that was defibrillated by disc ultra-refining into homogeneous cellulose nanofibrils (20.5 nm in diameter). Statistical optimization of the cellulosic hydrolysate fermentation led to ethanol pro-duction of 67.1 g/L, with a conversion yield of 0.48 g/g and productivity of 1.40 g/L.h.
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