Evaluation of pretreatment methods for enzymatic saccharification of wheat straw for bioethanol production

Govumoni, Sai Prashanthi; Koti, Sravanthi; Kothagouni, Srilekha Yadav; Venkateshwar, S.; Linga, Venkateswar Rao

doi:10.1016/j.carbpol.2012.08.019

Cited by 129 publications

(53 citation statements)

References 26 publications

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“…Values [0.1000 (Table 3). On the other hand, x 1 (Acid pretreatment time), x 3 (Cellulase loading), x 2 1 and x 2 3 have less effect (p [ F more than 0.05) on the reducing sugar concentration.…”

Section: Resultsmentioning

confidence: 84%

“…Enzymatic hydrolysis is an effective process to produce ethanol from lignocellulosic biomass [2]. Utilization of fossil fuels as the main source of energy has been increased with industrial revolution [3].…”

Section: Introductionmentioning

confidence: 99%

“…The production of ethanol by fermentation from renewable resources like municipal solid wastes [7], lignocellulosic residues [8], food waste [9] and wheat straw [2] have been researched in many studies. Low cost of spent tea waste makes it an important feedstock for fuel ethanol production.…”

Section: Introductionmentioning

confidence: 99%

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Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Yücel

Göycincik

2015

Waste Biomass Valor

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Spent tea waste (STW) is an important lignocellulosic waste as a cost-effective feedstock for ethanol production. The enzymatic hydrolysis of acid pretreated STW was investigated in this study. The effects of process parameters, including acid pretreatment time 26.4-93.6 min, b-glucosidase loading from 20 to 80 IU/g and cellulase loading from 11 to 45 IU/g on reducing sugar yield, were optimized by using central composite design of response surface methodology. The analysis of variance of data was examined by using response surface quadratic model. The valid model was used for optimization of the reducing sugar concentration during enzymatic hydrolysis. The optimum conditions for enzymatic saccharification were found to be acid pretreatment time of 27 min, b-glucosidase loading of 49 IU/g and cellulase loading of 12 IU/g. Maximum concentration of the reducing sugar under the optimum conditions was determined as 29.0 g reducing sugar/L.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Yücel

Göycincik

2015

Waste Biomass Valor

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“…Its production has gained importance in the last few years due to the increased dependency on oil and conventional fuels [1,2]. The global demand for ethanol has been increasing in recent years because of its wide use in chemical and motorfuel industries, and its important role in reduction of greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

Optimization of ethanol production from spent tea waste by Saccharomyces cerevisiae using statistical experimental designs

Yücel

Göycincik

2014

Biomass Conv. Bioref.

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The aim of this study was to investigate the prospect for the use of spent tea waste (STW), an important municipal waste, as a potential substrate to generate hydrolysates for fuel ethanol production. Acid pretreated STW was used as substrate for ethanol production. The critical variables that affected ethanol fermentation from STW were identified by Plackett-Burman designs and further optimized by using a five-level-three-factor central composite design of response surface methodology. The optimum conditions for ethanol fermentation were determined to be NH 4 Cl concentration of 2.7 g/L, yeast concentration of 11.7 g/L, and temperature of 42.8°C. Maximum concentration of reducing sugar and ethanol under the optimum conditions were 28.90 g reducing sugar/L and 12.72 g EtOH/L, respectively. Predicted ethanol concentration was obtained using quadratic polynomial equation. The predicted ethanol concentration was 13.38 g EtOH/L in the optimal conditions. Validity of the predicted model was confirmed using verification experiment (12.72 g EtOH/L).

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“…Most of the studies on obtaining ethyl levulinate had used waste directly without a prior chemical treatment, which is usually done frequently, primarily for obtaining bioethanol by enzyme [8] [9]. The pretreatment requires a higher consumption of reagents; it allows the removal of lignin.…”

Section: Introductionmentioning

confidence: 99%

Ethyl Levulinate Obtained from Lignocellulosic Waste Material with Previous Delignification by Ultrasonic-Assisted Technique

Solá-Pérez¹,

Saldarriaga-Noreña²,

Murillo-Tovar³

2017

JACEN

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Ultrasound-assisted pretreatment under mild operating conditions has been investigated for intensification of delignification to facilitate the obtaining of ethyl levulinate from biomass. The effect of pH (2 -12), temperature (30˚C -70˚C) and pretreatment time (0 -120 minutes) has been studied for different biomass samples. The most favorable conditions were basic pH, temperature of 70˚C and pretreatment time of 2 h, obtaining values of delignification near 80 percent. The ethyl levulinate is obtained in microwave directly via from samples before and after delignification and analyzed for GC-MS. The results evidenced better yields for the delignified samples.

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Evaluation of pretreatment methods for enzymatic saccharification of wheat straw for bioethanol production

Cited by 129 publications

References 26 publications

Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Optimization and Modelling of Process Conditions Using Response Surface Methodology (RSM) for Enzymatic Saccharification of Spent Tea Waste (STW)

Optimization of ethanol production from spent tea waste by Saccharomyces cerevisiae using statistical experimental designs

Ethyl Levulinate Obtained from Lignocellulosic Waste Material with Previous Delignification by Ultrasonic-Assisted Technique

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