Enhancement of glucose yield from canola agricultural residue by alkali pretreatment based on multi-regression models

Yoo, Hah Young; Lee, Ja Hyun; Kim, Dong Sup; Lee, Ju Hun; Lee, Soo Kweon; Lee, Sang Jun; Park, Chulhwan; Kim, Seung Wook

doi:10.1016/j.jiec.2017.03.018

Cited by 33 publications

(28 citation statements)

References 32 publications

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“…The significantly high biomass to glucose recovery ( Figure 3) at this pretreatment condition further confirms its effectiveness. Yoo et al [35] reported that the optimal pretreatment condition is where the biomass to glucose recovery value is high, and close to the initial glucan content in the biomass. The decrease in hydrolysis efficiency and glucose concentration of the peel biomass pretreated with the H 3 PO 4 concentrations of 80% and above is attributed to the sugar degradation during the pretreatment process (Figure 1a,b).…”

Section: Discussionmentioning

confidence: 97%

Fermentable Sugar Production from the Peels of Two Durian (Durio zibethinus Murr.) Cultivars by Phosphoric Acid Pretreatment

Obeng

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2018

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The potential of durian (Durio zibethinus Murr.) peel as feedstock for the production of fermentable sugars was evaluated. Durian peel biomass from two cultivars, monthong (Durio zibethinus Murr. cv. Monthong) and chanee (Durio zibethinus Murr. cv. Chanee), were pretreated with different concentrations (70%, 75%, 80%, and 85%) of phosphoric acid (H3PO4) at a moderate temperature of 60 °C for 60 min. The H3PO4-pretreated durian peel biomass was then subjected to enzymatic hydrolysis. Significantly higher glucan (44.74 ± 0.21%) content was observed in the monthong peel compared to the chanee peel (42.06 ± 0.28%). Phosphoric acid pretreatment caused the significant solubilization of the xylan and acid soluble lignin (ASL) contents. This enhanced the enzymatic hydrolysis process causing a significant increase in the hydrolysis efficiency and glucose concentration. The highest hydrolysis efficiency and glucose concentration were obtained after 72 h from the 75% H3PO4-pretreated peel biomass for both the monthong (90.33 ± 0.42% and 9.55 ± 0.11 g/L, respectively) and chanee (90.06 ± 0.40% and 8.56 ± 0.13 g/L, respectively) peels. Biomass to glucose recovery for monthong and chanee were improved by approximately 7- and 6-fold, respectively. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis showed destruction of the peel biomass structure and changes in the cellulose crystallinity index (CrIs).

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Section: Discussionmentioning

confidence: 97%

Fermentable Sugar Production from the Peels of Two Durian (Durio zibethinus Murr.) Cultivars by Phosphoric Acid Pretreatment

Obeng

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2018

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“…Highly severe conditions may decrease the glucose yield and subsequently lead to low bioethanol yield. Consequently, the maximum glucose should be recovered at the optimum pretreatment condition(s) for fermentation into bioethanol [31].…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon might be attributed to the significant decrease in total solid, including glucan, at high NaOH concentrations in this study (Figure 1). The optimum pretreatment condition(s) for improving the efficiency of enzymatic hydrolysis may be severe enough to reduce glucose recovery due to a decrease in total solid [31]. Low solid recovery, which significantly affects the sugar recovery during enzymatic hydrolysis, is of great concern, especially under severe pretreatment condition(s) [36].…”

Section: Resultsmentioning

confidence: 99%

Combining Autoclaving with Mild Alkaline Solution as a Pretreatment Technique to Enhance Glucose Recovery from the Invasive Weed Chloris barbata

Obeng

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2019

Biomolecules

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Developing an optimum pretreatment condition to enhance glucose recovery assessed the potential of Chloris barbata, which is a common invasive weed in Thailand, as a feedstock for bioethanol production. Chloris barbata was exposed to autoclave-assisted alkaline pretreatment by using different sodium hydroxide (NaOH) concentrations (1% to 4%) and heat intensities (110 °C to 130 °C) that were dissipated from autoclaving. The optimum condition for pretreatment was determined to be 2% NaOH at 110 °C for 60 min. At this condition, maximum hydrolysis efficiency (90.0%) and glucose recovery (30.7%), as compared to those of raw C. barbata (15.15% and 6.20%, respectively), were observed. Evaluation of glucose production from 1000 g of C. barbata based on material balance analysis revealed an estimated yield of 304 g after pretreatment at the optimum condition when compared to that of raw C. barbata (61 g), an increase of five-fold. Structural analysis by the scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed the disruption of the intact structure of C. barbata and an increase in the cellulose crystallinity index (CrI), respectively. The results from this study demonstrate the efficiency of using C. barbata as a potential feedstock for bioethanol production.

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“…The model quality was evaluated by the coefficients of determination (R 2 ) and the analysis of variances (ANOVA). The quadratic response surface model was fitted by following Equation (1):Y=β0+∑i=14βiXi+∑i=14βiiXi2+∑i=13∑j=14βijXiXj where Y is the response factor (DAP conversion), X i and X j are the i th and j th independent factor, respectively; β 0 is the intercept; β i is the first order model coefficients; β ii is the quadratic coefficients for the factor i ; β ij is the linear model coefficient for the interaction between factors i and j [23,24,25].…”

Section: Methodsmentioning

confidence: 99%

Enhanced l-Lysine into 1,5-Diaminopentane Conversion via Statistical Optimization of Whole-Cell Decarboxylation System

et al. 2019

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The global lysine companies in the feed industry have steadily built their production facilities due to the high demand for l-lysine in animal farms, and in recent years there have been excessive supply problems and the world market price of l-lysine has fallen. In this study, the conversion of 1,5-diaminopentane (DAP) by decarboxylation of l-lysine was strategically chosen to enhance the value of lysine. The decarboxylation is enzymatically accessible, and Hafnia alvei, which is the producer of l-lysine decarboxylase, was applied as a whole-cell form. In the designed whole-cell biocatalytic system, the major four reaction factors were selected by fundamental investigation and then statistical optimization was performed to estimate the optimum condition. The predicted conversion was assessed at about 94.6% at the optimum conditions (125.1 mM l-lysine and 71.5 g/L acetone concentration at 35.2 °C for 8.4 h). Under the determined conditions, DAP conversions by using analytical, feed and industrial crude l-lysine were found to be 98.3%, 92.5% and 72.4%, respectively. These results could be suggested to solve the problem of excessive supplied lysine and also to provide guidance for improved enzymatic conversion by statistical optimization.

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Enhancement of glucose yield from canola agricultural residue by alkali pretreatment based on multi-regression models

Cited by 33 publications

References 32 publications

Fermentable Sugar Production from the Peels of Two Durian (Durio zibethinus Murr.) Cultivars by Phosphoric Acid Pretreatment

Fermentable Sugar Production from the Peels of Two Durian (Durio zibethinus Murr.) Cultivars by Phosphoric Acid Pretreatment

Combining Autoclaving with Mild Alkaline Solution as a Pretreatment Technique to Enhance Glucose Recovery from the Invasive Weed Chloris barbata

Enhanced l-Lysine into 1,5-Diaminopentane Conversion via Statistical Optimization of Whole-Cell Decarboxylation System

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