Evaluation of pelleting as a pre-processing step for effective biomass deconstruction and fermentation

Guragain, Yadhu N.; Wilson, Jonathan M.; Staggenborg, Scott A.; McKinney, Leland J.; Wang, Donghai; Vadlani, Praveen V.

doi:10.1016/j.bej.2013.05.014

Cited by 42 publications

(23 citation statements)

References 20 publications

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“…One reason is that pellets with 6.5 mm diameter and 44.5 mm thick can be used directly for pretreatment without any preprocessing such as milling . Several other studies demonstrate the effective conversion of pellets into fermentable sugar after pretreatment with acid or base followed by enzymatic hydrolysis. Pelletization also increases the bulk density of feedstock by three to four times the bale density, which reduces the required truck trips and the overall transportation cost.…”

Section: Methodsmentioning

confidence: 99%

Supply and value chain analysis of mixed biomass feedstock supply system for lignocellulosic sugar production

Baral

Davis

Bradley

2019

Biofuels Bioprod Bioref

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The sustainable supply of high‐quality, low‐cost biomass feedstock to cellulosic biorefineries is still a challenge. Utilizing corn stover as the single feedstock to a biorefinery also poses a source of risk to seasonal feedstock availability, affordability, and sustainability. Implementing a year‐round feedstock switching strategy or utilizing an optimal mixture of corn stover, miscanthus, and switchgrass is demonstrated to diminish these concerns while reducing the cost of sugar production by as much as 3.8% and 13.6%, respectively, when compared to a baseline sugar price of 441.9 $ metric ton−1 (t) attributed to a fixed corn stover feedstock basis. This study determines that a mixing ratio of corn stover, miscanthus, and switchgrass of 36%, 50%, and 14%, respectively, minimizes the selling price of sugar. If miscanthus is sufficiently available in the future, its fraction could be further increased to 70% by reducing the fraction of corn stover. We find that the mixed feedstock considered in this study reduces the nutrient replacement and feedstock transportation costs and improves the quality of feedstock (determined by total carbohydrates and ash) relative to corn stover alone. Results suggest that a high‐quality feedstock with a high carbohydrate content is an important metric for consideration, beyond strictly the feedstock cost, to reduce the selling price of sugar and its uncertainties. In the future this may be supported by the increased availability of higher carbohydrate feedstocks such as miscanthus. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

Supply and value chain analysis of mixed biomass feedstock supply system for lignocellulosic sugar production

Baral

Davis

Bradley

2019

Biofuels Bioprod Bioref

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“…As shown in Figure 2, both pelleted and unpelleted biomass samples were alkali pretreated by mixing 10 g of ground biomass (size < 1 mm) with 100 mL of 1% (w/v) aqueous alkali, and autoclaved at 121˚C for 30 min, followed by filtration of biomass slurry [33].…”

Section: Determination Of Phenolic Content In Alkali Pretreatedmentioning

confidence: 99%

Evaluation of Standards and Interfering Compounds in the Determination of Phenolics by Folin-Ciocalteu Assay Method for Effective Bioprocessing of Biomass

Bastola¹,

Guragain²,

Bhadriraju³

et al. 2017

AJAC

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Folin Ciocalteu (F-C) assay is the most widely used and convenient method to determine the total phenolics content in foods, herbs, and other plant extracts. Different phenolics standards such as gallic acid, ferulic acid, chlorogenic acid, catechol, and vanillic acid have been used for calibration curves in this assay method. Comparison of these standards, in single or combination of two or more, for more accurate determination of phenolics has not been reported so far. This study tested five single phenolics and seven combinations of mixed phenolic standards to evaluate the optimal standards for F-C method. The different standards were tested to calculate the phenolic content in three known test solutions. We also evaluated interference effect of various compounds in phenolics estimation by F-C method that is usually present in the lignocellulosic biomass-derived sugar solution, and in food products along with phenolics. Finally, the optimal standards with five phenolics were used for the determination of phenolics in alkali pretreated biomass extract. The results indicated that gallic acid was the best standard among the single phenolic compounds and five phenolic compounds solution was the best standard among the mixed phenolic solutions. The presence of glucose, HMF, furfural, and vitamin-B12 did not interfere in phenolic determination; whereas ascorbic acid, tyrosine, formic acid, and acetic acid strongly interfered the results. The results also showed that biomass pelleting process did not affect the generation of phenolics in alkali pretreatment extract.

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“…Other microorganisms, such as Aureobasidium pullulans and several Fusarium species [91,92], have been reported as sources of hemicellulose-degrading enzymes [96]. Bachmann and McCarthy [89] also reported that, in cellulase systems, synergism is exhibited in xylan-degrading systems.…”

Section: Enzymatic Hydrolysis Of Hemicellulosesmentioning

confidence: 94%

“…Then ethanol was fermented using Saccharomyces cereviseae, and a maximum ethanol yield of 24.14 g/L and 76.9% fermentation efficiency were achieved. Another alkali pretreatment evaluation was studied by Guragain et al, in which maximum enzymatic hydrolysis yield and ethanol yield were 0.71 g/g and 95%, respectively [91]. Sills and Gossett [92] reported using FTIR to predict saccharification from enzymatic hydrolysis of alkali-pretreated big bluestem.…”

Section: Pretreatment Processmentioning

confidence: 99%

Big bluestem as a bioenergy crop: A review

Zhang

Johnson

Prasad

et al. 2015

Renewable and Sustainable Energy Reviews

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Evaluation of pelleting as a pre-processing step for effective biomass deconstruction and fermentation

Cited by 42 publications

References 20 publications

Supply and value chain analysis of mixed biomass feedstock supply system for lignocellulosic sugar production

Supply and value chain analysis of mixed biomass feedstock supply system for lignocellulosic sugar production

Evaluation of Standards and Interfering Compounds in the Determination of Phenolics by Folin-Ciocalteu Assay Method for Effective Bioprocessing of Biomass

Big bluestem as a bioenergy crop: A review

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