Effect of Various Pretreatment Methods on Bioethanol Production from Cotton Stalks
| Autor: | Dimitris Kekos, Argiro Louloudi, Konstantinos G. Kalogiannis, Nikolaos Papayannakos, Thomas Paschos, Diomi Mamma, Angelos A. Lappas, Konstantinos Dimos |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
organosolv alkali pretreatment Organosolv Plant Science Pretreatment method 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) Hydrothermal circulation microwave-assisted acid pretreatment hydrothermal treatment Hydrolysis 0404 agricultural biotechnology 010608 biotechnology Ethanol fuel cotton stalks high solids pre-hydrolysis and simultaneous saccharification and fermentation Chemical composition bioethanol lcsh:TP500-660 Chemistry 04 agricultural and veterinary sciences lcsh:Fermentation industries. Beverages. Alcohol 040401 food science Biofuel Fermentation Food Science Nuclear chemistry |
| Zdroj: | Fermentation Volume 5 Issue 1 Pages: 5 Fermentation, Vol 5, Iss 1, p 5 (2019) |
| ISSN: | 2311-5637 |
| DOI: | 10.3390/fermentation5010005 |
| Popis: | Cotton stalks (CS) are considered a good candidate for fuel-ethanol production due to its abundance and high carbohydrate content, but the direct conversion without pretreatment always results in extremely low yields due to the recalcitrant nature of lignocelluloses. The present study was undertaken to investigate the effect of various chemical and physicochemical pretreatment methods, i.e., alkali, microwave-assisted acid, organosolv, hydrothermal treatment, and sequentially organosolv and hydrothermal pretreatment, on chemical composition of CS and subsequent ethanol production applying pre-hydrolysis and simultaneous saccharification and fermentation (PSSF) at high solid loading. The best results in terms of ethanol production were achieved by the sequential combination of organosolv and hydrothermal pretreatment (32.3 g/L, using 15% w/v substrate concentration and 6 h pre-hydrolysis) with an improvement of 32% to 50% in ethanol production compared to the other pretreatments. Extending pre-hydrolysis time to 14 h and increasing substrate concentration to 20% w/v, ethanol production reached 47.0 g/L (corresponding to an ethanol yield of 52%) after 30 h of fermentation. |
| Databáze: | OpenAIRE |
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