Abstract
Rapeseed straw was utilized as a cheap raw material for ethanol production. Effects of steam explosion on chemical composition, enzymatic hydrolysis (EH) and simultaneous saccharification and fermentation (SSF) were studied. Changes in the pretreatment conditions showed strong effects on digestibility of the resulting straw. The optimum results were obtained at 180°C, 10% solid fraction, 1% H2SO4, and 10 min retention time. Under optimal condition, glucose hydrolysis yields of 93 and 89% were obtained for 5 and 10% solid fractions, respectively. The corresponding ethanol yields were 63 and 67% of maximum theoretical value. Next, data of the experimental runs were exploited for modeling the processes by artificial neural networks (ANNs) and performance of the developed models was evaluated. The ANN-based models showed a great potential for time-course prediction of the studied processes. Efficiency of the joint network for simulating the whole process was also determined and promising results were obtained.
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Díaz, M. J., C. B. Cara, E. N. Ruiz, I. Romero, M. Moya, and E. Castro (2010) Hydrothermal pre-treatment of rapeseed straw. Bioresour. Technol. 101: 2428–2435.
Sarkar, N., S. K. Ghosh, S. Bannerjee, and K. Aikat (2012) Bioethanol production from agricultural wastes: An overview. Renew. Energ. 37: 19–27.
Hsu, T. A. (1996) Pretreatment of biomass, Washington DC, Taylor & Francis, USA.
Hu, G., J. A. Heitmann, and O. J. Rojas (2008) Feedstock pretreatment strategies for producing ethanol from wood, bark, and forest residues. BioResources. 3: 270–294.
Talebnia, F., D. Karakashev, and I. Angelidaki (2010) Production of bioethanol from wheat straw: An overview on pretreatment, hydrolysis and fermentation. Bioresour. Technol. 101: 4744–4753.
Varga, E., K. Réczey, and G. Zacchi (2004) Optimization of steam pretreatment of corn stover to enhance enzymatic digestibility. App. Biochem.Biotechnol. — Part A Enz. Eng. Biotechnol. 114: 509–523.
Mackie, K. L., H. H. Brownell, K. L. West, and J. N. Saddler (1985) Effect of sulphur dioxide and sulphuric acid on steam explosion of Aspenwood. J. Wood Chem. Technol. 5: 405–425.
Sun, Y. and J. Cheng (2002) Hydrolysis of lignocellulosic materials for ethanol production: a review. Bioresour. Technol. 83: 1–11.
Taherzadeh, M. J., L. Gustafsson, C. Niklasson, and G. Lidén (1999) Physiological effects of 5-hydroxymethylfurfural on Saccharomyces cerevisiae. Appl. Microb. Biotechnol. 53: 701–708.
Talebnia, F., C. Niklasson, and M. J. Taherzadeh (2005) Ethanol production from glucose and dilute-acid hydrolyzates by encapsulated S. cerevisiae. Biotechnol. Bioeng. 90: 345–353.
Bas, D., F. C. Dudak, and I. H. Boyaci (2007) Modeling and optimization III: Reaction rate estimation using artificial neural network (ANN) without a kinetic model. J. Food Eng. 79: 622–628.
Chang, C. W., W. C. Yu, W. J. Chen, R. F. Chang, and W. S. Kao (2011) A study on the enzymatic hydrolysis of steam exploded Napier grass with alkaline treatment using artificial neural networks and regression analysis. J. Taiwan Inst. Chem. E. 42: 889–894.
Basheer, I. A. and M. Hajmeer (2000) Artificial neural networks: Fundamentals, computing, design, and application. J. Microbiol. Meth. 43: 3–31.
Hajmeer, M. and I. Basheer (2003) Comparison of logistic regression and neural network-based classifiers for bacterial growth. Food Microbiol. 20: 43–55.
Sluiter, A., B. Hames, R. Ruiz, C. Scarlata, J. Sluiter, D. Templeton, and D. Crocker (2010) Determination of structural carbohydrates and lignin in Biomass. NREL — Laboratory Analytical Procedure (LAP).
Decker, S. R., W. S. Adney, E. Jennings, T. B. Vinzant, and M. E. Himmel (2003) Automated filter paper assay for determination of cellulase activity. Appl. Biochem. Biotechnol. 105: 689–703.
Jeong, T. S., B. H. Um, J. S. Kim, and K. K. Oh (2010) Optimizing dilute-acid pretreatment of rapeseed straw for extraction of hemicellulose. Appl. Biochem. Biotechnol. 161: 22–33.
Galbe, M. and G. Zacchi (2002) A review of the production of ethanol from softwood. Appl. Microbiol. Biotechnol. 59: 618–628.
Tomás-Pejó, E., J. M. Oliva, and M. Ballesteros (2008) Realistic approach for full-scale bioethanol production from lignocellulose: A review. J. Sci. Ind. Res. 67: 874–884.
Choi, C. H., J. S. Kim, and K. K. Oh (2013) Evaluation the efficacy of extrusion pretreatment via enzymatic digestibility and simultaneous saccharification & fermentation with rapeseed straw. Biomas. Bioenerg. 54: 211–218.
Lopez-Linares, J. C., I. Romero, C. Cara, E. Ruiz, E. Castro, and M. Moya (2013) Experimental study on ethanol production from hydrothermal pretreated rapeseed straw by simultaneous saccharification and fermentation. J. Chem. Technol. Biotechnol. DOI 10.1002/jctb.4110.
Tomas, A. F., P. Karagoz, D. Karakashev, and I. Angelidaki (2013) Extreme thermophilic ethanol production from rapeseed straw: Using the newly isolated thermoanaerobacter pentosaceus and combining it with Saccharomyces cerevisiae in a Two-Step. Proc. Biotech. Bioeng. 110: 1574–1582.
Bobleter, O. (1994) Hydrothermal degradation of polymers derived from plants. Elsevier, Kidlington, ROYAUME-UNI.
Lawther, M., R. Sun, and W. B. Banks (1996) Effect of steam treatment on the chemical composition of wheat straw. Holzforschung. 50: 365–371.
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Talebnia, F., Mighani, M., Rahimnejad, M. et al. Ethanol production from steam exploded rapeseed straw and the process simulation using artificial neural networks. Biotechnol Bioproc E 20, 139–147 (2015). https://doi.org/10.1007/s12257-013-0535-6
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DOI: https://doi.org/10.1007/s12257-013-0535-6