LAPSE:2021.0486
Published Article
LAPSE:2021.0486
Insights on Monosaccharides and Bioethanol Production from Sweet Sorghum Stalks Using Dilute Acid Pretreatment
May 28, 2021
Sweet sorghum is a unique bioenergy crop that produces stalks with fermentable free sugars. The purpose of this study was to evaluate how the production of hemicellulosic saccharides and bioethanol from sweet sorghum stalks (SSS) can be influenced by a dilute sulfuric acid (H2SO4) pretreatment under different isothermal conditions. The bioethanol production from untreated SSS and pretreated solid phases was achieved through the Simultaneous Saccharification and Fermentation (SSF) process. A good SSS fractionation and an extensive hemicellulose hydrolysis into soluble saccharides were obtained, the most abundant hemicellulose-derived compounds present in the pretreated liquid phase being monosaccharides, with up to 17.22 g/L of glucose and 16.64 g/L of xylose in the pretreatments performed with 3% and 1% H2SO4 for 30 min at 134 °C, respectively. The SSF process of untreated SSS allowed a maximum bioethanol concentration of 9.78 g/L, corresponding to a maximum glucan conversion into ethanol of 49.8%. Bioethanol production from untreated SSS led to a higher bioethanol concentration and conversion than in the case of using acid pretreated solid phases obtained under the most severe conditions (with 3% H2SO4 for 30, 60 and 120 min at 134 °C), suggesting that, in the case of this biomass naturally rich in soluble sugars, the acidic pretreatment could negatively influence the fermentative process.
Keywords
bioethanol production, dilute acid pretreatment, monosaccharides, simultaneous saccharification and fermentation, sweet sorghum stalks
Suggested Citation
Buruiană CT, Georgescu L, Isticioaia SF, Constantin OE, Vizireanu C, Dinică RM, Furdui B. Insights on Monosaccharides and Bioethanol Production from Sweet Sorghum Stalks Using Dilute Acid Pretreatment. (2021). LAPSE:2021.0486
Author Affiliations
Buruiană CT: Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania [ORCID]
Georgescu L: Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania
Isticioaia SF: Agricultural Research and Development Station Secuieni, 617415 Neamț, Romania
Constantin OE: Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania [ORCID]
Vizireanu C: Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania [ORCID]
Dinică RM: Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania [ORCID]
Furdui B: Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, 800201 Galati, Romania [ORCID]
Journal Name
Processes
Volume
8
Issue
11
Article Number
E1486
Year
2020
Publication Date
2020-11-18
ISSN
2227-9717
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Original Submission
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PII: pr8111486, Publication Type: Journal Article
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LAPSE:2021.0486
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https://doi.org/10.3390/pr8111486
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May 28, 2021
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Calvin Tsay
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