Sugarcane hybrids with original low lignin contents and high field productivity are useful to reach high glucose yields from bagasse

Laurito-Friend, D.F.; Mendes, Fernanda M.; Reinoso, F.M.; Ferraz, André; Milagres, Adriane M. F.

doi:10.1016/j.biombioe.2015.02.015

Cited by 32 publications

(51 citation statements)

References 29 publications

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“…The aim was to use alkaline sulfite pretreated samples with varied compositional characteristics to compare both groups of substrates under enzymatic hydrolysis, aiming to prepare glucose plus xylose rich syrups. Solids yield and chemical composition of alkaline sulfite pretreated samples were previously reported, showing that the yield of recovered solids was in the range of 80–97% for 5% sulfite loads and 71–89% for 7.5% sulfite loads. Decreased solid yields with increasingly sulfite loads were mainly a consequence of increased delignification efficiency .…”

Section: Resultsmentioning

confidence: 57%

“…Solids yield and chemical composition of alkaline sulfite pretreated samples were previously reported, showing that the yield of recovered solids was in the range of 80–97% for 5% sulfite loads and 71–89% for 7.5% sulfite loads. Decreased solid yields with increasingly sulfite loads were mainly a consequence of increased delignification efficiency . Figure compares components removal in alkaline and acid sulfite processes.…”

Section: Resultsmentioning

confidence: 57%

“…Comparing the varied sugarcane bagasse samples, it is noteworthy that the H166 pretreated by acid sulfite process and by alkali sulfite (7.5%) showed almost the same glucan hydrolysis efficiency (Figure ). In both samples the residual lignin content was high, although the alkaline sulfite process provided higher sulfonation degree of residual lignin . These data suggest that xylan removal in acidic conditions provided higher benefits for subsequent enzymatic hydrolysis than sulfonation of residual lignins.…”

Section: Resultsmentioning

confidence: 75%

“…In this study, acid sulfite pretreatment provided higher saccharification yields than dilute acid pretreatment, which was attributed to the presence of sulfonic acids in the SPORL pretreated materials (10.9 lignin and 7.7 mg/g lignin, respectively) . In contrast, significantly higher sulfonation of residual lignins has been reported for the sulfite process performed under alkaline conditions . The alkaline‐sulfite process has been widely used for pulping in the past and currently is industrially applied to produce high yield chemithermomechanical pulps.…”

Section: Introductionmentioning

confidence: 78%

“…The performance of the pretreatments is also influenced by different sugarcane cultivars since wide variation occurs regarding lignin and hemicellulose contents as well as in the anatomical structure . Even in pretreatmens based on the use of sulfite ions that greatly increase the enzymatic digestibility of lignocelluloses, varied reaction conditions are required to enhance cellulose digestibility depending on the sugarcane cultivar …”

Section: Introductionmentioning

confidence: 99%

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Comparative evaluation of acid and alkaline sulfite pretreatments for enzymatic saccharification of bagasses from three different sugarcane hybrids

Monte

Laurito-Friend

Mussatto

et al. 2018

Biotechnology Progress

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Sugarcane bagasses from three experimental sugarcane hybrids and a mill-reference sample were used to compare the efficiency and mode of action of acid and alkaline sulfite pretreatment processes. Varied chemical loads and reaction temperatures were used to prepare samples with distinguished characteristics regarding xylan and lignin removals, as well as sulfonation levels of residual lignins. The pretreatment with low sulfite loads (5%) under acidic conditions (pH 2) provided maximum glucose yield of 70% during enzymatic hydrolysis with cellulases (10 FPU/g) and β-glucosidases (20 UI/g bagasse). In this case, glucan enzymatic conversion from pretreated materials was mostly associated with extensive xylan removal (70-100%) and partial delignification occurred during the pretreatment. The use of low sulfite loads under acidic conditions required pretreatment temperatures of 160°C. In contrast, at a lower pretreatment temperature (120°C), alkaline sulfite process achieved similar glucan digestibility, but required a higher sulfite load (7.5%). Residual xylans from acid pretreated materials were almost completely hydrolysed by commercial enzymes, contrasting with relatively lower xylan to xylose conversions observed in alkaline pretreated samples. Efficient xylan removal during acid sulfite pretreatment and during enzymatic digestion can be useful to enhance glucan accessibility and digestibility by cellulases. Alkaline sulfite process also provided substrates with high glucan digestibility, mainly associated with delignification and sulfonation of residual lignins. The results demonstrate that temperature, pH, and sulfite can be combined for reducing lignocellulose recalcitrance and achieve similar glucan conversion rates in the alkaline and acid sulfite pretreated bagasses. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:944-951, 2018.

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Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparative evaluation of acid and alkaline sulfite pretreatments for enzymatic saccharification of bagasses from three different sugarcane hybrids

Monte

Laurito-Friend

Mussatto

et al. 2018

Biotechnology Progress

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A review of sugarcane bagasse for second‐generation bioethanol and biopower production

Bezerra

Ragauskas

2016

Biofuels Bioprod Bioref

213

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Sugarcane bagasse is a large-volume agriculture residue that is generated on a ~540 million metric tons per year basis globally 1,2 with the top-three producing countries in Latin America being Brazil (~181 million metric ton yr −1 ), 3 Mexico (~15 million metric ton yr −1 ), 4 and Colombia (~7 million metric ton yr −1 ), 5 respectively. 6 Given sustainability concerns and the need to maximize the utilization of bioresources, the use of sugarcane bagasse is receiving signifi cant attention in biorefi ning applications, as it is a promising resource for the conversion to biofuels and biopower. This review provides a comprehensive review of bagasse and its chemical constituents and on-going research into its utilization as a feedstock for cellulosic ethanol and electricity generation.

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Sugarcane biomass conversion influenced by lignin

Schmatz

Tyhoda

Brienzo

2019

Biofuels Bioprod Bioref

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Plant biomass residues are renewable sources for the production of biofuels and high‐value macromolecules. Sugarcane bagasse is one such plant biomass residue that is available from the sugar‐processing industry. It is used as a raw material for biobased ethanol production. However, some of its properties and its behavior during processing have a major inhibitory effect on its successful conversion. Chief among these inhibitory properties are the lignin content, its distribution in plant tissues, and its chemical properties. These make the materials naturally resistant to bioconversion processes. Further, lignin and carbohydrate degradation products can be formed during acid pretreatment, which is one of the major steps during biomass conversion to bioethanol. These products negatively affect the liberation of fermentable sugars and the yield of ethanol during the fermentation stage of the conversion process. Other factors that also have an influence on the production of fermentable sugar are related to the different structural arrangement of plant tissues (cane fractions of the node, internode, and external fraction), as well as biomass variety. Biomass varieties with low lignin content result in an improved yield of fermentable sugars, which in turn contributes to improved viability of the second‐generation bioethanol production processes. By selecting sugarcane varieties with the best properties, ethanol production can be increased without increasing the total area under cultivation. Efforts have been dedicated to reducing biomass recalcitrance by classical and precision breeding. Genetic modification of sugarcane alters the genes responsible for the encoding enzymes for lignin biosynthesis, generating sugarcane with low recalcitrance. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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Sugarcane hybrids with original low lignin contents and high field productivity are useful to reach high glucose yields from bagasse

Cited by 32 publications

References 29 publications

Comparative evaluation of acid and alkaline sulfite pretreatments for enzymatic saccharification of bagasses from three different sugarcane hybrids

Comparative evaluation of acid and alkaline sulfite pretreatments for enzymatic saccharification of bagasses from three different sugarcane hybrids

A review of sugarcane bagasse for second‐generation bioethanol and biopower production

Sugarcane biomass conversion influenced by lignin

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