Ionic liquid pretreatment allows utilization of high substrate loadings in enzymatic hydrolysis of biomass to produce ethanol from cotton stalks

Haykır, Nazife Işık; Bakır, Ufuk

doi:10.1016/j.indcrop.2013.10.017

Cited by 45 publications

(12 citation statements)

References 37 publications

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“…In the literature, cellulose content of native CS ranged from 30% to 39.8% (w/w) while hemicellulose from 10.7% to 16.7% (w/w). The total lignin content of CS is comparable to that reported elsewhere (approximately 27% to 30%, w/w) [4,22,23]. According to Agblevor et al [24] composition of CS varies depending on the growing location, season, harvesting methods, as well as analysis procedures.…”

Section: Composition Of Native and Pretreated Cssupporting

confidence: 81%

“…Various pretreatments of CS have been reported in literature i.e., alkali pretreatment [4,6,26], high pressure-assisted alkali pretreatment and ultrasound-assisted alkali pretreatment [27,28], steam explosion [29], liquid hot water pretreatment [23], dilute acid pretreatment [27,30], pretreatment with ILs [22], ozone treatment [4]. The outcome of each pretreatment in terms of lignin and hemicellulose solubilization depends on the pretreatment method and the conditions applied.…”

Section: Composition Of Native and Pretreated Csmentioning

confidence: 99%

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Effect of Various Pretreatment Methods on Bioethanol Production from Cotton Stalks

et al. 2019

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Cotton stalks (CS) are considered a good candidate for fuel-ethanol production due to its abundance and high carbohydrate content, but the direct conversion without pretreatment always results in extremely low yields due to the recalcitrant nature of lignocelluloses. The present study was undertaken to investigate the effect of various chemical and physicochemical pretreatment methods, i.e., alkali, microwave-assisted acid, organosolv, hydrothermal treatment, and sequentially organosolv and hydrothermal pretreatment, on chemical composition of CS and subsequent ethanol production applying pre-hydrolysis and simultaneous saccharification and fermentation (PSSF) at high solid loading. The best results in terms of ethanol production were achieved by the sequential combination of organosolv and hydrothermal pretreatment (32.3 g/L, using 15% w/v substrate concentration and 6 h pre-hydrolysis) with an improvement of 32% to 50% in ethanol production compared to the other pretreatments. Extending pre-hydrolysis time to 14 h and increasing substrate concentration to 20% w/v, ethanol production reached 47.0 g/L (corresponding to an ethanol yield of 52%) after 30 h of fermentation.

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Section: Composition Of Native and Pretreated Cssupporting

confidence: 81%

Section: Composition Of Native and Pretreated Csmentioning

confidence: 99%

Effect of Various Pretreatment Methods on Bioethanol Production from Cotton Stalks

et al. 2019

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“…However, other crops are also prominent, such as wheat, cassava, rice, banana, and oil palm. Processing these crops generates large amounts of solid residues, including in‐field or agricultural residues (straw, leaves, and foliage) and agro‐industrial processing residues (bagasse, bunches, and shells) with diverse composition and volume (Table ) …”

Section: The Agro‐industrial Residues In South Americamentioning

confidence: 99%

Lignocellulosic biomass from agro‐industrial residues in South America: current developments and perspectives

Magalhães

Carvalho

Pereira

et al. 2019

Biofuels Bioprod Bioref

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South America is a pivotal supplier of agricultural commodities for a growing world population. This large-scale production generates a substantial amount of lignocellulosic residue. Inadequate disposal of this material can lead to putrefaction and leaching, and can attract insects and rodents. Solid residues can be treated by incineration or composting -both causing greenhouse gas emissions. Biotransformation of lignocellulosic residues into valuable products has been proposed as a more sophisticated alternative to burning. However, pretreatment steps are necessary to obtain fermentable sugars for biological or thermochemical transformation into value-added products. In this review, we noted trends in lignocellulosic biomass generation and potential uses, with special attention to the procedures necessary for the generation of fermented products and bio-oil. This survey pointed out that sugarcane bagasse, cereal straws, bananas, and oil-palm biomass can generate about 900 million tonnes of biomass by 2025. Based on production data from several researchers it was estimated that these raw materials have the potential for annual production of more than 550 million tonnes of fermentable sugars (i.e., glucose and xylose), 670 million tonnes of bio-oil, or 4000 TWh of thermal energy. We describe procedures and strategies for the conversion of these residues to produce higher value-added biomolecules and to promote more sustainable application of lignocellulosic biomass

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“…24,25 Moreover, it has been indicated that EMIMAc is able to extract substantial amount of lignin from biomass. EMIMAc pretreatment was applied to a variety of lignocelullulosic biomass such as switchgrass, [26][27][28] cotton stalks, 25,29,30 southern yellow pine, red oak, 31 agave bagasse, 28 corn stover, 32 and Douglas-fir 33 in order to enhance enzymatic digestibility.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid pretreatment of yellow pine followed by enzymatic hydrolysis and fermentation

Elmacı

Özçelik

2018

Biotechnology Progress

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In this study, it was aimed to enhance the enzymatic hydrolysis of recalcitrant yellow pine wood and subsequently to produce ethanol efficiently through the application of 1-ethyl-3-methylimidazolium acetate (EMIMAc) ionic liquid. The effect of biomass particle size (<2.5 mm, 500-850 μm, 363-500 μm, and <363 μm) prior to pretreatment and pretreatment time (15, 30, and 45 min) on the structural properties and enzymatic hydrolysis yield of EMIMAc pretreated pine wood were also investigated. In general, EMIMAc functioned more efficiently at larger biomass particle sizes compared to smaller ones. Dissolution of solids by pretreatment, amount of lignin extracted from biomass as well as biomass to glucose yield was increased with increasing pretreatment time. The conversion of biomass to glucose was 56% under the selected optimum conditions (500-850 μm particle size; 5% biomass concentration and 140°C-45 min EMIMAc pretreatment). The biomass samples pretreated at the optimal conditions were subjected to simultaneous saccharification and fermentation (SSF) and separate hydrolysis and fermentation (SHF) which resulted in ethanol yields of 86 and 96%, respectively. The results presented in this study give a general framework for reducing the recalcitrance of pine to enzymatic saccharification and microbial fermentation by EMIMAc pretreatment without need for long pretreatment times and size reduction. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 2018.

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Ionic liquid pretreatment allows utilization of high substrate loadings in enzymatic hydrolysis of biomass to produce ethanol from cotton stalks

Cited by 45 publications

References 37 publications

Effect of Various Pretreatment Methods on Bioethanol Production from Cotton Stalks

Effect of Various Pretreatment Methods on Bioethanol Production from Cotton Stalks

Lignocellulosic biomass from agro‐industrial residues in South America: current developments and perspectives

Ionic liquid pretreatment of yellow pine followed by enzymatic hydrolysis and fermentation

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