Subcritical water hydrolysis of soybean residues for obtaining fermentable sugars

Vedovatto, Felipe; Ugalde, Gustavo A.; Bonatto, Charline; Bazoti, Suzana F.; Treichel, Helen; Mazutti, Márcio A.; Zabot, Giovani L.; Tres, Marcus V.

doi:10.1016/j.supflu.2020.105043

Cited by 47 publications

(16 citation statements)

References 44 publications

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“…If this graph is presented with cumulative mass values of sugars over time (g/100 g biomass), the curve could reach a constant plateau, especially after 8 min for the 180 °C / V-20 and 220 °C -V-20 conditions. This behavior is also reported with subcritical water hydrolysis of residual biomass from agricultural harvesting and processing (ABAIDE et al, 2019;SANTOS et al, 2020;VEDOVATTO et al, 2021).…”

Section: Resultssupporting

confidence: 75%

“…Based on clean and sustainable technology, the hydrolysis with subcritical water is favorable for the dissociation of lignocellulosic biomass. Some studies have been conducted with subcritical water hydrolysis to convert agricultural residues, such as sugarcane bagasse (LACHOS-PEREZ et al, 2016), rice straw (CHEN et al, 2018), pecan residues (SANTOS et al, 2020), coconut husks (MUHARJA et al, 2020), and soybean straw and husks (VEDOVATTO et al, 2021). Therefore, this work aimed to apply subcritical water hydrolysis to obtain fermentable sugars from olive leaves and stems.…”

Section: Introductionmentioning

confidence: 99%

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Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars

Rodrigues

Silveira

Kury

et al. 2021

Reveng

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Subcritical water hydrolysis was used for the pre-treatment of residues generated in olive groves. Fermentable sugars were produced from the lignocellulosic material found in olive leaves and stems. Firstly, moisture, ash, particle average diameter, and total extracts were measured. Afterward, subcritical water hydrolysis was carried out at 20 MPa in a 50 mL reactor. The influences of two temperatures (180 and 220 °C) and two water flow rates (10 and 20 mL min-1) on the sugars yields were evaluated. The concentration of sugars was 31.3 g L-1 at 180 °C and 10 mL min-1 in a reaction for 3 min, of which glucose was the major sugar (27.64 g L-1). Statistical analysis was performed using Sisvar® 5.6 software and the averages were compared through Tukey’s test, considering a significance level of 95% (p<0.05). For the treatments evaluated in this work, only xylose was statistically different in the treatments with different water flow rates. The highest values of xylose were obtained with 10 mL min-1, which were 1.82 g L-1 (180 °C) and 2.18 g L-1 (220 °C). The total inhibitors were high at 220 °C for all water flow rates, with a significant difference from the averages obtained at 180 °C.

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Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars

Rodrigues

Silveira

Kury

et al. 2021

Reveng

View full text Add to dashboard Cite

show abstract

“…The calibration curves were prepared in concentrations ranging until 100 g/L for all sugars. The samples were analyzed once for collected samples of each experimental condition (Vedovatto et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

Optimization of Fermentable Sugar Production from Pineapple Leaf Waste (Ananas comosus [L.] Merr) by Enzymatic Hydrolysis

2021

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Pineapple leaf waste is one agricultural waste that has high cellulose content. Pineapple leaf waste's complex structure contains a bundle of packed fiber that makes it hard to remove lignin and hemicellulose structure, so challenging to produce reducing sugar. Dried pineapple leaf waste pretreated with a grinder to break its complex structure. Delignification process using 2% w/v NaOH solution at 87oC for 60 minutes has been carried out to remove lignin and hemicellulose structure so reducing sugar could be produced. Delignified pineapple leaf waste has been enzymatic hydrolyzed using cellulase enzyme (6 mL, 7 mL, and 8 mL) to produce reducing sugar. The sample was incubated in an incubator shaker at 155 rpm at 45, 55, and 60oC for 72 hours. Determination of reducing sugar yield had been carried out using the Dubois method and HPLC. The model indicated that the optimum operating condition of enzymatic hydrolysis is 7 mL of cellulase enzyme at 55oC to produce 96,673 mg/L reducing sugar. This result indicated that the enzymatic hydrolysis operating condition improved the reducing sugar yield from pineapple leaf waste. The optimum reducing sugar yield can produce biofuel by the saccharification process.

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“…It should be noted that this extract presents itself as a potential raw material for the manufacture of biofuels, where bioethanol is produced from the direct fermentation of simple sugars or after pretreatments of complex sugars followed by fermentation (Soccol et al, 2010;Zhang et al, 2020). Abaide et al (2019) and Vedovatto et al (2021) report obtaining fermentable sugars by-products through hydrolysis with subcritical water; however, although water is considered a green solvent, the use of this technology requires high pressures and high temperatures. Similarly, as the processes reported by Iwassa, Ribeiro, et al (2019) and Giombelli et al (2020) using subcritical water for sugar extraction.…”

Section: Introductionmentioning

confidence: 99%

Obtaining fermentable sugars and fiber concentrate from asparagus by‐product

Laidens

Iwassa

Stevanato

et al. 2021

J. Food Process. Preserv.

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In this study, different solid-liquid extraction conditions to obtain fermentable sugars from an asparagus by-product were investigated to produce a fiber concentrate.To evaluate the effects of agitation, solvent:sample ratio and temperature, an experimental design was used and the maximum extraction conditions of reducing sugars (RS) were determined. The diffusion coefficient of sugars in water at different temperatures was obtained, as well as the thermodynamic parameters of the process. The materials obtained before and after the extraction were characterized as composition, technological properties, and functional groups. The results showed that, under the conditions evaluated, agitation had the highest influence on the RS extraction, followed by the solvent:sample ratio and temperature. The maximum RS content (~30 g 100 g −1 dry asparagus by-product) was obtained at 125 rpm, 60°C,

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Subcritical water hydrolysis of soybean residues for obtaining fermentable sugars

Cited by 47 publications

References 44 publications

Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars

Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars

Optimization of Fermentable Sugar Production from Pineapple Leaf Waste (Ananas comosus [L.] Merr) by Enzymatic Hydrolysis

Obtaining fermentable sugars and fiber concentrate from asparagus by‐product

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