Xylo-oligosaccharides and Ethanol Production from Liquid Hot Water Hydrolysate of Sugarcane Bagasse

Yu, Qiang; Xu, Chunxun; Zhuang, Xinshu; Yuan, Zhenhong; He, Meng; Zhou, Guangyan

doi:10.15376/biores.10.1.30-40

Cited by 24 publications

(8 citation statements)

References 22 publications

(25 reference statements)

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“…1) in 120 hours, following by 0.28 g g -1 at 60 g L -1 of xylose concentration, requiring 144 hours. According to the literature, species such as Scheffersomyces shehatae, Pachysolen tannophilus and Scheffersomyces stipitis are capable of achieving high ethanol yields from xylose on the order of 0.38, 0.36 and 0.49 g g -1 , respectively (Cheng et al, 2008;Antunes et al, 2014;Yu et al, 2015). According to Galafassi et al (2011), the yeast D. bruxellensis in conventional batch cultivations with synthetic medium under oxygen limiting conditions showed a yield of 0.44 g g -1 .…”

Section: Fermentation With Pentose Recycling In Synthetic Fermentatiomentioning

confidence: 99%

Ethanol production from Dekkera bruxellensis in synthetic media with pentose

Codato

Martini

Ceccato-Antonini

et al. 2018

Braz. J. Chem. Eng.

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Ethanol is obtained in Brazil from the fermentation of sugarcane, molasses or a mixture of these. Alternatively, it can also be obtained from products composed of cellulose and hemicellulose, called "second generation ethanol-2G". The yeast Saccharomyces cerevisiae, commonly applied in industrial ethanol production, is not efficient in the conversion of pentoses, which is present in high amounts in lignocellulosic materials. This study aimed to evaluate the ability of a yeast strain of Dekkera bruxellensis in producing ethanol from synthetic media, containing xylose or arabinose, xylose and glucose as the sole carbon sources. The results indicated that D. bruxellensis was capable of producing ethanol from xylose and arabinose, with ethanol concentration similar for both carbon sources, 1.9 g L-1. For the fermentations performed with xylose and glucose, there was an increase in the concentration of ethanol to 5.9 g L-1 , lower than the standard yeast Pichia stipitis (9.3 g L-1), but with similar maximum yield in ethanol (0.9 g g TOC-1). This proves that the yeast D. bruxellensis produced lower amounts of ethanol when compared with P. stipitis, but showed that is capable of fermenting xylose and can be a promising alternative for ethanol conversion from hydrolysates containing glucose and xylose as carbon source.

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Section: Fermentation With Pentose Recycling In Synthetic Fermentatiomentioning

confidence: 99%

Ethanol production from Dekkera bruxellensis in synthetic media with pentose

Codato

Martini

Ceccato-Antonini

et al. 2018

Braz. J. Chem. Eng.

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“…The main advantages of the LHW process are the use of lower temperatures and that the formation of degradation products can be minimized. During biomass hydrolysis, hot water cleaves hemiacetal linkages and liberates acids, which facilitates the breakage of ether linkages in biomass (Marchessault et al 1959;Yu et al 2015). Since the cost of the solvent is minimal, it can also be an advantage for large scale application.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Liquid Hot Water Cotton Linter to Prepare Cellulose Membrane using NaOH/Urea or LiOH/Urea

Gan¹,

Padzil²,

Zakaria³

et al. 2015

BioResources

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The liquid hot water (LHW) pretreatment on cotton linter (CL) was carried out using an autoclave heated in a hot oil bath. The LHW pretreated CL (LCL) was dissolved in NaOH/urea and LiOH/urea aqueous solutions and subsequently used to produce cellulose membrane. The effects of LHW pretreatment, amount of cellulose, and type of alkaline solvent on properties of cellulose solution and cellulose membrane were studied.The formation of cellulose II and crystallinity index (CrI) on the cellulose membranes were confirmed by X-ray diffraction (XRD). The morphology of cellulose membranes were observed by field emission scanning electron microscopy (FESEM). The LHW pretreatment resulted in higher cellulose solubility, higher cellulose solution viscosity, and improved properties of regenerated cellulose products compared to non-treated cellulose. Results also revealed that the amount of cellulose used affected the solubility and viscosity of the cellulose solution and the higher dissolving power of the LiOH/urea system as compared to the NaOH/urea system. In fact, higher solubility and viscosity properties are key factors in many cellulose applications such as membranes, fibers, hydrogels, and other regenerated cellulose products.

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“…Many reports have shown that it can be prepared by auto-hydrolysis of biomass and partial acid or enzymatic hydrolysis of hemicellulose (Akpinar et al 2009). Using MBSP at pH 5.13, the amount of XOS reached 11.04 g/L, which is considerably higher than that in liquid hot water pretreatment (7.50 g/L) (Yu et al 2014). In addition, the different preparation methods of XOS resulted in different molecular weight distributions of XOS (Akpinar et al 2009).…”

Section: Degradation Compounds Of Lignocelluloses After Pretreatmentmentioning

confidence: 93%

Comparative Evaluation of Magnesium Bisulfite Pretreatment under Different pH Values for Enzymatic Hydrolysis of Corn Stover

Ren

Liu

et al. 2016

BioResources

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During pretreatment, the pretreatment pH often plays an important role in removing hemicelluloses and lignin for improving the conversion of biomass to sugars. In this study, corn stover was subjected to magnesium bisulfite pretreatment (MBSP) under various pH conditions. The obtained data showed that the hemicelluloses and lignin were solubilized by MBSP, which led to changes in the structural and chemical properties of the pretreated material. The pretreatment pH could alter the existing forms of SO2, and magnesium bisulfite was the most effective reagent for removing lignin. A relatively neutral MBSP (pH 5.13) not only considerably improved the enzymatic hydrolysis yield (80.18%), but also produced a large amount of high-value xylo-oligosaccharides in the spent liquor. Furthermore, only the hemicellulose removal showed a linear relationship with the enzymatic hydrolysis yield. These results suggest that removal of all the lignin might not be necessary to improve the hydrolysis efficiency.

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Xylo-oligosaccharides and Ethanol Production from Liquid Hot Water Hydrolysate of Sugarcane Bagasse

Cited by 24 publications

References 22 publications

Ethanol production from Dekkera bruxellensis in synthetic media with pentose

Ethanol production from Dekkera bruxellensis in synthetic media with pentose

Synthesis of Liquid Hot Water Cotton Linter to Prepare Cellulose Membrane using NaOH/Urea or LiOH/Urea

Comparative Evaluation of Magnesium Bisulfite Pretreatment under Different pH Values for Enzymatic Hydrolysis of Corn Stover

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