Bioethanol production from the comparison between optimization of sorghum stalk and sugarcane leaf for sugar production by chemical pretreatment and enzymatic degradation

Manmai, Numchok; Unpaprom, Yuwalee; Ponnusamy, Vinoth Kumar; Ramaraj, Rameshprabu

doi:10.1016/j.fuel.2020.118262

Cited by 74 publications

(29 citation statements)

References 64 publications

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“…Industrially, the acid and organosolv processes are reported to be used [19]. Acid pretreatment is widely used and efficiently removes hemicellulose, where the most common acid for pretreatment is sulfuric acid [20][21][22]. Other acids can also be used, including hydrochloric acid [20], nitric acid [23] and phosphoric acid [24].…”

Section: Introductionmentioning

confidence: 99%

“…Acid pretreatment is widely used and efficiently removes hemicellulose, where the most common acid for pretreatment is sulfuric acid [20][21][22]. Other acids can also be used, including hydrochloric acid [20], nitric acid [23] and phosphoric acid [24]. However, some released byproducts such as furfural and hydroxymethylfurfural, derived from sugars acid hydrolysis, can decrease fermentation performance.…”

Section: Introductionmentioning

confidence: 99%

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Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Rodrigues

Almeida

Maitan-Alfenas

et al. 2021

Braz. arch. biol. technol.

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Different lignocellulosic biomasses are found worldwide and each country has its own important industrial crop that can be converted into high-value products, such as ethanol. Therefore, evaluation of new biomasses to be used in biorefineries is important to decrease the dependence on non-renewable resources and to guarantee sustainable development. This work evaluated Brachiaria brizantha, a grass commonly used as animal forage, and the standard biomass for 2G-ethanol, sugarcane bagasse. The chemical compositions of both biomasses were determined and different times and temperature of acid pretreatment were tested. Morphological analysis via scanning electron microscopy showed more deconstructed fibers after harsher biomass pretreatments. Simultaneous saccharification and fermentation of pretreated Brachiaria brizantha presented higher efficiency than when using sugarcane bagasse as the carbon source. A biomass conversion of 46 % was achieved when Brachiaria brizantha grass was pretreated with 2% sulfuric acid for 60 minutes. Moreover, fermentation was not impaired by the inhibitors furfural and hydroxymethylfurfural. It was concluded that Brachiaria brizantha is a promising biomass for ethanol production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Rodrigues

Almeida

Maitan-Alfenas

et al. 2021

Braz. arch. biol. technol.

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“…For the reducing sugars identification, the 3,5-DNS method was chosen [ 43 , 44 ]. This method has proved its validation for reducing sugars identification by using known standard solutions [ 45 , 46 , 47 ]. Two calibration curves were prepared, one with glucose and the second with fructose.…”

Section: Methodsmentioning

confidence: 99%

Characterization of Orange Peel Waste and Valorization to Obtain Reducing Sugars

et al. 2021

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Annually, millions of tons of foods are generated with the purpose to feed the growing world population. One particular eatable is orange, the production of which in 2018 was 75.54 Mt. One way to valorize the orange residue is to produce bioethanol by fermenting the reducing sugars generated from orange peel. Hence, the objective of the present work was to determine the experimental conditions to obtain the maximum yield of reducing sugars from orange peel using a diluted acid hydrolysis process. A proximate and chemical analysis of the orange peel were conducted. For the hydrolysis, two factorial designs were prepared to measure the glucose and fructose concentration with the 3,5-DNS acid method and UV-Visible spectroscopy. The factors were acid concentration, temperature and hydrolysis time. After the hydrolysis, the orange peel samples were subjected to an elemental SEM-EDS analysis. The results for the orange peel were 73.530% of moisture, 99.261% of volatiles, 0.052% of ash, 0.687% of fixed carbon, 19.801% of lignin, 69.096% of cellulose and 9.015% of hemicellulose. The highest concentration of glucose and fructose were 24.585 and 9.709 g/L, respectively. The results highlight that sugar production is increased by decreasing the acid concentration.

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“…Various pretreatment (physical, chemical and biological) of lignocellulosic biomass have been conducted to remove the lignin, which inhibits the enzymatic hydrolysis, and to enhance the depolymerization and dissociation of fermentable sugar [ 14 ]. Chemical pretreatment has been widely used because of its advantages of low process cost and high sugar recovery [ 15 ]. Alkali pretreatment is carried out under mild conditions with less corrosive reagents including potassium hydroxide (KOH), sodium hydroxide (NaOH) and calcium hydroxide (Ca(OH) 2 ), and generates less fermentation inhibitory compounds compared to acid pretreatment [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

Lee

et al. 2021

IJERPH

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Worldwide, about one-third of food produced for human consumption is wasted, which includes byproducts from food processing, with a significant portion of the waste still being landfilled. The aim of this study is to convert chestnut shells (CNSs) from food processing into a valuable resource through bioprocesses. Currently, one of the highest barriers to bioprocess commercialization is low conversion of sugar from biomass, and KOH pretreatment was suggested to improve enzymatic digestibility (ED) of CNS. KOH concentration of 3% (w/w) was determined as a suitable pretreatment solution by a fundamental experiment. The reaction factors including temperature, time and solid/liquid (S/L) ratio were optimized (77.1 g/L CNS loading at 75 °C for 2.8 h) by response surface methodology (RSM). In the statistical model, temperature and time showed a relatively significant effect on the glucan content (GC) and ED, but S/L ratio was not. GC and ED of the untreated CNS were 45.1% and 12.7%, respectively. On the other hand, GC and ED of pretreated CNS were 83.2% and 48.4%, respectively, and which were significantly improved by about 1.8-fold and 3.8-fold compared to the control group. The improved ED through the optimization is expected to contribute to increasing the value of byproducts generated in food processing.

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Bioethanol production from the comparison between optimization of sorghum stalk and sugarcane leaf for sugar production by chemical pretreatment and enzymatic degradation

Cited by 74 publications

References 64 publications

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Characterization of Orange Peel Waste and Valorization to Obtain Reducing Sugars

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

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