Acid and enzyme hydrolysis to convert pretreated lignocellulosic materials into glucose for ethanol production

El‐Zawawy, Waleed K.; Ibrahim, Maha M.; Abdel-Fattah, Yasser R.; Soliman, Nadia A.; Mahmoud, Mohamed

doi:10.1016/j.carbpol.2010.12.022

Cited by 117 publications

(55 citation statements)

References 19 publications

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“…This technique is economically attractive, is an additional potential for energy efficiency, requires less hazardous process chemicals, and offers complete sugar recovery (Tomas-Pejo 2008). The extraction of cellulose from cotton gin waste was studied using a steam explosion technology as a pretreatment process followed by alkali bleaching which produces higher yield of ethanol (El-Zawawy et al 2011). Addition of H 2 SO 4 (or SO 2 ) or CO 2 in steam explosion of lignocellulosic waste can efficiently improve enzymatic hydrolysis, reduce the production of inhibitory compounds, and lead to more complete liquefaction of hemicellulose, glucan, xylan, mannan, galactan, and arabinan (Jeoh and Agblevor 2001;Sun et al 2002).…”

Section: Physicochemical Pretreatmentmentioning

confidence: 99%

Bioconversion of Cotton Gin Waste to Bioethanol

Sahu

Pramanik

2015

Soil Biology

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Section: Physicochemical Pretreatmentmentioning

confidence: 99%

Bioconversion of Cotton Gin Waste to Bioethanol

Sahu

Pramanik

2015

Soil Biology

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“…Even dilute acid pretreatment of lignocellulosic biomass has been researched for several materials [5]. The pretreatment of biomass at high temperature (150 -240 °C) and the quantity of acid used becomes an uneconomical cost production [6]. However, dilute acid pretreatment has been shown to successfully hydrolyze hemicelluloses and disrupt the ligno-cellulosic structure for a wide range of feedstocks [7,12].…”

Section: Introductionmentioning

confidence: 99%

Efecto del tratamiento previo de ácido diluido - peróxido en la hierba napier (Pennisetum purpureum schumach) para mejorar la reducción Producción de azúcar por hidrólisis enzimática

Bohórquez

González

Reina

2014

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The napier grass (Pennisetum purpureum Schumach.) is a potential feedstock biomass for conversion to ethanol, bio-energy or high added value products. Variation in prehydrolysis parameters (time, acid strength, biomass %, particle size) and enzymatic saccharification conditions were examined for conversion of napier grass into fermentable sugars. A pretreatment of the water insoluble substrate (WIS H 2 SO 4 ) at 15.1 % of reducing sugar yield (RSY) was done with peroxide (H 2 0 2 ) at 122 °C. The relationship between RSY and the acid process parameters are described by a mathematical model derived from the experimental data.The peroxide pretreatment at 0.7 % (w/w), 4.75 mm particle size, 8% (w/v) biomass concentration, improved the RSY production from enzymatic hydrolysis in 97.6 % after 75 min. The enzymatic hydrolysis produced 287.81 mg/(g initial dry sample) of glucose and 245.81 mg/(g initial dry sample) of Xylose. Therefore, it was concluded that combination peroxide -acid pretreatment is an effective and environmentally friendly method for the enzyme hydrolysis of napier grass.

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“…The effective use of these residues as source of chemical compounds requires the separation of cellulose, hemicellulose, and lignin (Kahar et al 2013) via physical (Iskalieva et al 2012;Subhedar and Gogate 2014), chemical (Yan et al 2010;Duque et al 2013), and biological treatments (El-Zawawy et al 2011;Wang et al 2011). The removal of lignin of plant waste is perhaps the most difficult process.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Sulfite Concentration, Particle Size, and Reaction Time in Lignosulfonate Production from Barley Straw Using Response Surface Methodology and Artificial Neural Network

et al. 2016

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Barley straw is a lignocellulosic biomass that can be used to obtain value-added products for industrial applications. Barley straw hydrolysis with sodium sulfite facilitates the production of lignosulfonates. In this work, the delignification process of barley straw by solubilizing lignin through sulfite method was studied. Response surface methodology and artificial neural network were used to develop predictive models for simulation and optimization of delignification process of barley straw. The influence of parameters over sulfite concentration (1.0 to 10.0%), particle size (8 to 20), and reaction time (30 to 90 min) on total percentage of solubilized material was investigated through a three level three factor (3 3 ) full factorial central composite design with the help of Matlab® ver. 8.1. The results show that particle size and sulfite concentration have the most significant effect on delignification process. Both techniques, response surface methodology and artificial neural networks, predicted the lignosulfonate yield adequately, although the artificial neural network technique produced a better fit (R 2 = 0.9825) against the response surface methodology (R 2 = 0.9290). Based on these findings, this study can be used as a guide to forecast the potential production of lignosulfonates from barley straw using different experimental conditions.

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Acid and enzyme hydrolysis to convert pretreated lignocellulosic materials into glucose for ethanol production

Cited by 117 publications

References 19 publications

Bioconversion of Cotton Gin Waste to Bioethanol

Bioconversion of Cotton Gin Waste to Bioethanol

Efecto del tratamiento previo de ácido diluido - peróxido en la hierba napier (Pennisetum purpureum schumach) para mejorar la reducción Producción de azúcar por hidrólisis enzimática

Modeling of Sulfite Concentration, Particle Size, and Reaction Time in Lignosulfonate Production from Barley Straw Using Response Surface Methodology and Artificial Neural Network

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