Combined alkali pretreatment for enhanced enzymatic saccharification of sugarcane leaf

Yang, Gong; Fu, Zhibin; Liu, Menglian; Yu, Dian; Lin, Jianghai; Liu, Zehuan

doi:10.1016/j.biteb.2019.100196

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…High concentrations of Si and Ca form low—melting–point eutectics, which can cause slagging. Salts of these elements do form surface deposits on heating equipment 21 . The five-biomass mixture has a relative concentration of chlorine with maximum concentration in corn cob and sugarcane bagasse with values of 487 ppm and 250 ppm respectively.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Awoyale

Lokhat

Okete

2021

Sci Rep

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Lignocellulosic biomass is an important source of renewable energy and a potential replacement for fossil fuels. In this work, the X-ray fluorescence (XRF) method was used to analyze the elemental composition of raw and pretreated lignocellulosic biomass of cassava peels, corn cobs, rice husks, sugarcane bagasse, yam peels, and mixtures of cassava peels and yam peels, corn cobs and rice husks and all five biomass samples combined. The influence of particle size on elemental properties was investigated by screening the selected biomass into two size fractions, of an average of 300 and 435 µm, respectively. The total concentration of Mg, Al, Si, P, S, Cl, Ca, Ti, Cr, Mn, Fe, Co, Cu, Zn, Sn, Ni, Br, Mo, Ba, Hg, and Pb were determined for each of the biomass samples before and after the different pretreatments adopted in this study. From the results of the analysis, there was a significant reduction in the concentration of calcium in all the analyzed biomass after the alkaline pretreatment with rice husks biomass having the lowest concentration of 66 ppm after the alkaline pretreatment. The sulfur content of the acid pretreated biomass increased considerably which is likely due to the sulfuric acid used for the acid pretreatment. The fact that a mixture of biomass feedstock affects the properties of the biomass after pretreatment was validated in the mixed biomass of cassava peels and yam peels biomass as an example. The concentration of Mg in the mixed biomass was 1441 ppm but was 200 ppm and 353 ppm in individual cassava peels and yam peels respectively. The results of this study demonstrated that pretreated mixtures of biomass have varied elemental compositions, which could be an important factor affecting downstream processes, especially if a hybrid feedstock is used in a large-scale application.

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Section: Resultsmentioning

confidence: 99%

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Awoyale

Lokhat

Okete

2021

Sci Rep

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“…Among the various pretreatment methods, acid, alkali, hot water, ionic liquids, steam exploration and organic solvent pretreatments are always adopted [4]. It is noteworthy that alkaline pretreatment using sodium hydroxide is one of the most prospective technologies, as it could effectively lead to removal of lignin, swelling of bers and decrease of crystallinity and polymerization degree of lignocellulosic substrates [5][6][7]. In addition, sodium hydroxide also had some advantages such as lower price than potassium hydorxide, better solubility than calcium hydroxide and stronger alkalinity than ammonium hydroxide [8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Sodium Hydroxide Pretreatment and Enzymatic Hydrolysis of Wheat Straw Powder by Cellulases and Xylanases From Aspergillus Niger HQ-1 Using Response Surface Methodology

Zhang¹,

Wu²

2021

Preprint

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To maximize fermentable sugars production, response surface methodology (RSM) was adopted to optimize pretreatment and enzymatic hydrolysis of wheat straw powder (WSP) using the crude cellulases preparation containing xylanases from Aspergillus niger HQ-1. Factors of pretreatment including sodium hydroxide concentration, pretreatment time and temperature were found to have significant effects on sugars production. Results indicated that WSP with particle size 0.3 mm should be pretreated using 1.8% (w/v) sodium hydroxide solution with 25.0% (w/v) of solid loading at 94.0°C for 46.0 min and the optimized pretreatment conditions could result in 90.9% of cellulose recovery, 54.6% of hemicellulose recovery and 72.7% of lignin removal, respectively. Furthermore, variables of enzymatic hydrolysis including enzyme loading, biomass loading and reaction time were proved to have significant effects on sugars yields. After hydrolysis at 50°C for 44.8 h with 7.1% (w/v) of biomass loading, 8.1 FPU/g of enzyme loading and 0.2% (w/v) of Tween-80, maximum yields of reducing sugar (632.92 mg/g) and xylose (149.83 mg/g) could be obtained, respectively. In addition, holocellulose and hemicellulose conversion were 81.6% and 80.0%, respectively. To the best of our knowledge, this is the first report about systematic optimization of sodium hydroxide pretreatment and enzymatic hydrolysis of WSP using RSM.

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Comparative of alkaline hydrogen peroxide pretreatment using NaOH and Ca(OH)2 and their effects on enzymatic hydrolysis and fermentation steps

Meléndez-Hernández

Hernández‐Beltrán

Hernández-Guzmán

et al. 2019

Biomass Conv. Bioref.

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Combined alkali pretreatment for enhanced enzymatic saccharification of sugarcane leaf

Cited by 8 publications

References 35 publications

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Optimization of Sodium Hydroxide Pretreatment and Enzymatic Hydrolysis of Wheat Straw Powder by Cellulases and Xylanases From Aspergillus Niger HQ-1 Using Response Surface Methodology

Comparative of alkaline hydrogen peroxide pretreatment using NaOH and Ca(OH)2 and their effects on enzymatic hydrolysis and fermentation steps

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Combined alkali pretreatment for enhanced enzymatic saccharification of sugarcane leaf

Cited by 8 publications

References 35 publications

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Investigation of the effects of pretreatment on the elemental composition of ash derived from selected Nigerian lignocellulosic biomass

Optimization of Sodium Hydroxide Pretreatment and Enzymatic Hydrolysis of Wheat Straw Powder by Cellulases and Xylanases From Aspergillus Niger&nbsp;HQ-1 Using Response Surface Methodology

Comparative of alkaline hydrogen peroxide pretreatment using NaOH and Ca(OH)2 and their effects on enzymatic hydrolysis and fermentation steps

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Optimization of Sodium Hydroxide Pretreatment and Enzymatic Hydrolysis of Wheat Straw Powder by Cellulases and Xylanases From Aspergillus Niger HQ-1 Using Response Surface Methodology