Search for optimum conditions of sugarcane bagasse hemicellulose extraction

Brienzo, Michel; Siqueira, Adriano Francisco; Milagres, Adriane M. F.

doi:10.1016/j.bej.2009.05.012

Cited by 177 publications

(104 citation statements)

References 22 publications

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“…Xylanases were produced by submerged fermentation (SmF) in Erlenmeyer fl asks (250 mL) containing 50 mL of medium composed of sugarcane bagasse 3.0 % (by mass per volume) and (in mass %): (NH 4 6 spores per mL counted by microscopy in a Neubauer chamber. The fl asks were incubated at the optimal growth temperature with orbital shaking (model TE421; Tecnal, São Paulo, Brazil) at 180 rpm for 144 h. The biomass was separated by fi ltering through gauze and fi lter paper.…”

Section: Cultivation and Enzyme Productionmentioning

confidence: 99%

Screening of Xylanolytic Aspergillus fumigatus for Prebiotic Xylooligosaccharide Production Using Bagasse

Carvalho

Neto

Almeida

et al. 2015

Food Technol. Biotechnol.

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Currently, lignocellulosic waste is a topic of global studies, given that fossil fuel reserves are diminishing, the new agricultural frontiers are limited and the demand for food and biofuels is increasing by the growing world population (1). For these reasons, technology must advance to improve the use of agricultural and agroindustrial residues to obtain food and biofuel.Xylans present in lignocellulosic materials have been studied for obtaining xylooligosaccharides (XOS) from waste materials such as corncobs, rice hulls, olive pits, barley straw (2), tobacco stalk, cott on stalk, sunfl ower stalk, wheat straw (3) and sugarcane bagasse (4-6). Sugarcane bagasse is inexpensive, renewable and abundant source of XOS especially in the countries that produce ethanol and sugar from sugarcane. However, more research is necessary to improve the use of this residue. SummarySugarcane bagasse is an important lignocellulosic material studied for the production of xylooligosaccharides (XOS). Some XOS are considered soluble dietary fi bre, with low caloric value and prebiotic eff ect, but they are expensive and not easily available. In a screening of 138 fungi, only nine were shortlisted, and just Aspergillus fumigatus M51 (35.6 U/mL) and A. fumigatus U2370 (28.5 U/mL) were selected as the most signifi cant producers of xylanases. These fungi had low β-xylosidase activity, which is desirable for the production of XOS. The xylanases from Trichoderma reesei CCT 2768, A. fumigatus M51 and A. fumigatus U2370 gave a signifi cantly higher XOS yield, 11.9, 14.7 and 7.9 % respectively, in a 3-hour reaction with hemicellulose from sugarcane bagasse. These enzymes are relatively thermostable at 40-50 °C and can be used in a wide range of pH values. Furthermore, these xylanases produced more prebiotic XOS (xylobiose and xylotriose) when compared with a commercial xylanase. The xylanases from A. fumigatus M51 reached a high level of XOS production (37.6 %) in 48-72 h using hemicellulose extracted from sugarcane bagasse. This yield represents 68.8 kg of prebiotic XOS per metric tonne of cane bagasse. In addition, in a biorefi nery, aft er hemicellulose extraction for XOS production, the residual cellulose could be used for the production of second-generation ethanol.

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Section: Cultivation and Enzyme Productionmentioning

confidence: 99%

Screening of Xylanolytic Aspergillus fumigatus for Prebiotic Xylooligosaccharide Production Using Bagasse

Carvalho

Neto

Almeida

et al. 2015

Food Technol. Biotechnol.

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“…Hemicellulose is a branched polymer composed of sugar monomers, such as glucose, xylose, mannose, arabinose, galactose, and uronic acid (Cheng et al 2010;Gírio et al 2010). Research on hemicellulose has focused on the extraction, separation, chemical derivation, hydrothermal treatment, or carbonization for energy-related applications (Schlesinger et al 2006;Brienzo et al 2009;Egüeś et al 2011;Kang et al 2012;Liu et al 2013). The chemical changes have been reported for hemicelluloses in terms of mass loss (Bremer et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Thermal Treatment of Poplar Hemicelluloses at 180 to 220 °C under Nitrogen Atmosphere

Liang¹,

Wang²

2016

BioResources

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Hemicelluloses were separated from poplar wood and exposed to thermal treatment. Changes in chemical content were investigated from 180 °C to 220 °C in a nitrogen atmosphere. Fourier transform infrared spectroscopy, X-ray diffraction, and differential thermal gravimetric analysis were used to characterize the hemicellulose before and after the thermal treatment. The effects of temperature on hygroscopicity and color were measured. The results showed that hemicelluloses were sensitive to temperature. β-glucosidic bonds and side chains in hemicelluloses were cleaved around 180 °C, and the increased temperature promoted the breaking process. Esterification reactions happened during the treatment. When the treatment temperature reached 220 °C, all side chains broke down, and partial carbonization occurred. Therefore, the color became darker, and the hydrophobicity increased. This study could help to explain the changes in wood that occur during thermal treatment.

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“…The prehydrolysis of sugar cane bagasse with H 2 O 2 (Bjerre, 1996;Brienzo et al, 2009) and the Mild Alkaline/Oxidative process (Cheng et al, 2008) significantly improves its susceptibility to enzymatic hydrolysis (Bjerre, 1996).…”

Section: Introductionmentioning

confidence: 99%

Sugar cane bagasse prehydrolysis using hot water

Abril

Medina

Abril

2012

Braz. J. Chem. Eng.

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-Results are presented on the hot water prehydrolysis of sugar cane bagasse for obtaining ethanol by fermentation. The experimental study consisted of the determination of the effect of temperature and time of prehydrolysis on the extraction of hemicelluloses, with the objective of selecting the best operating conditions that lead to increased yield of extraction with a low formation of inhibitors. The study, carried out in a pilot plant scale rotational digester, using a 3 2 experimental design at temperatures of 150-190°C and times of 60-90 min, showed that it is possible to perform the hot water prehydrolysis process between 180-190°C in times of 60-82 min, yielding concentrations of xylose ≥ 35 g/L, furfural ≤ 2.5 g/L, phenols from soluble lignin ≤ 1.5 g/L, and concentrations ≤ 3.0 g/L of hemicelluloses in the cellolignin residue. These parameters of temperature and prehydrolysis time could be used for the study of the later hydrolysis and fermentation stages of ethanol production from sugar cane bagasse.

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Search for optimum conditions of sugarcane bagasse hemicellulose extraction

Cited by 177 publications

References 22 publications

Screening of Xylanolytic Aspergillus fumigatus for Prebiotic Xylooligosaccharide Production Using Bagasse

Screening of Xylanolytic Aspergillus fumigatus for Prebiotic Xylooligosaccharide Production Using Bagasse

Thermal Treatment of Poplar Hemicelluloses at 180 to 220 °C under Nitrogen Atmosphere

Sugar cane bagasse prehydrolysis using hot water

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