Combined pretreatments of eucalyptus sawdust for ethanol production within a biorefinery approach

Guigou, Mairan; Cabrera, María Noel; Vique, Mauricio; Bariani, Melissa; Guarino, Juan; Ferrari, Mario Daniel; Lareo, Claudia

doi:10.1007/s13399-018-0353-3

Cited by 32 publications

(20 citation statements)

References 30 publications

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“…Eucalyptus sawdust proved to be an abundant source of carbohydrates (58.8 %), mainly glucan (45.4 %), according to its chemical composition ( Table 1 ). However, a considerable amount of lignin (28.7 %) was also found in the biomass, which corresponds quite well with previously reported data [ 22 , 24 ]. Since this high lignin content may compromise enzymatic hydrolysis efficiency, alkaline pretreatment was carried out in this work to enhance the delignification of biomass.…”

Section: Resultssupporting

confidence: 92%

“…However, during the eucalyptus pulp production process, particularly during wood chipping, considerable amounts of solid residues (eucalyptus sawdust) are discarded from the pulping process due to size limitations. Moreover, it has been previously demonstrated by our research group that this material represents an attractive renewable resource in biorefineries for the production of biofuels and value-added platform chemicals [ [22] , [23] , [24] ]. The utilization of eucalyptus sawdust from local pulp industries as a substrate for lactic acid production has not been reported in the literature and is considered an interesting alternative to improve the pulp and paper industry revenues.…”

Section: Introductionmentioning

confidence: 99%

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Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Camesasca

Mattos

Vila

et al. 2021

Biotechnology Reports

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Highlights Eucalyptus enzymatic hydrolysate contained mixture of glucose and xylose sugars. Carnobacterium sp. produced lactic acid from eucalyptus enzymatic hydrolysate. Glucose was consumed faster and completely rather than xylose during fermentation. Fed-batch fermentation improved lactic acid production and reached 30 g/L.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Camesasca

Mattos

Vila

et al. 2021

Biotechnology Reports

Self Cite

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“…On the screening, the wood chips are categorized according to their size. Oversized pieces must be re-chipped, whereas undersized chips should be rejected, but they still have the potential to be further valorized [48]. These small fibers are regularly designated by sawdust [34,49].…”

Section: Chipping and Screeningmentioning

confidence: 99%

“…Other applications include manufacturing fiberboards and particle boards [15,51,52] and the production of pellets, a significant renewable solid fuel [51][52][53]. The small size of sawdust does not allow its use for pulping due to overprocessing [48]. Pinto et al [26] showed that E. globulus sawdust is composed of 48.4% glucose, 13.9% xylose and 27.7% lignin, 1.1% ashes and 1.1% extractives.…”

Section: Chipping and Screeningmentioning

confidence: 99%

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

et al. 2022

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The pulp and paper industry is recognized as a well-established sector, which throughout its process, generates a vast amount of waste streams with the capacity to be valorized. Typically, these residues are burned for energy purposes, but their use as substrates for biological processes could be a more efficient and sustainable alternative. With this aim, it is essential to identify and characterize each type of waste to determine its biotechnological potential. In this context, this research highlights possible alternatives with lower environmental impact and higher revenues. The bio-based pathway should be a promising alternative for the valorization of pulp and paper industry wastes, in particular for bioproduct production such as bioethanol, polyhydroxyalkanoates (PHA), and biogas. This article focuses on state of the art regarding the identification and characterization of these wastes, their main applied deconstruction technologies and the valorization pathways reported for the production of the abovementioned bioproducts.

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“…Additionally, sodium hydroxide is comparatively economical, being 3 to 6 times cheaper than calcium hydroxide (Krishania et al 2013). Previous alkaline pretreatments usually focused on sodium hydroxide as alkali liquor (de Carvalho et al 2016;Guigou et al 2019). In the authors' previous study, a dilute alkaline pretreatment (sodium carbonate and calcium hydroxide mixture) was evaluated for saccharification of extruded Eucalyptus wood.…”

Section: Introductionmentioning

confidence: 99%

Robust pretreatment in combination with ultrasound-assisted surfactant to improve the enzymatic hydrolysis of Eucalyptus pellita

Zhand,

Yang,

Kang

et al. 2024

BioRes

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Alkaline pretreatment stands out as a valuable strategy in biomass conversion to overcome the recalcitrance of biomass by removing lignin and a part of hemicellulose. This enhances enzyme accessibility and promotes saccharification. However, increasing the alkaline concentration to enhance the delignification and improve glucose yield together presents inherent limitations. In this experiment the amount of delignification and glucose yield resulting from surfactant associated with sonication during mild alkaline pretreatment of Eucalyptus pellita was investigated. Also, the effect of various factors (sonication temperature and surfactant immersion time) on delignification and glucose yield were examined. The results demonstrated that surfactant associated with sonication pretreatment could overcome the limitation of alkaline pretreatment and could increase the amount of delignification alongside enzymatic hydrolysis glucose yield of Eucalyptus pellita wood by around 90%. The findings indicated that surfactant-assisted with sonication during mild alkaline pretreatment of Eucalyptus pellita (i.e., hardwood) could be recommended as a supporting pretreatment method for the production of monomeric sugars.

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Combined pretreatments of eucalyptus sawdust for ethanol production within a biorefinery approach

Cited by 32 publications

References 30 publications

Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Lactic acid production by Carnobacterium sp. isolated from a maritime Antarctic lake using eucalyptus enzymatic hydrolysate

Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy

Robust pretreatment in combination with ultrasound-assisted surfactant to improve the enzymatic hydrolysis of Eucalyptus pellita

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