A whole-slurry fermentation approach to high-solid loading for bioethanol production from corn stover
| Autor: | Aloia Romaní, Gil Garrote, Patricia Gullón, Pablo G. del Río, Beatriz Gullón, F.R. Rebelo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
020209 energy 3308.02 Residuos Industriales 02 engineering and technology Raw material 01 natural sciences lcsh:Agriculture agro-industrial residue Bioenergy 0202 electrical engineering electronic engineering information engineering Ethanol fuel autohydrolysis Stover Chemistry lcsh:S simultaneous saccharification and fermentation Pulp and paper industry biofuels environmentally friendly pretreatment Corn stover Biofuel Slurry Fermentation Agronomy and Crop Science 010606 plant biology & botany 3302.90 Ingeniería Bioquímica 3303.03 Procesos Químicos |
| Zdroj: | Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) Agronomy Volume 10 Issue 11 Agronomy, Vol 10, Iss 1790, p 1790 (2020) |
| Popis: | Corn stover is the most produced byproduct from maize worldwide. Since it is generated as a residue from maize harvesting, it is an inexpensive and interesting crop residue to be used as a feedstock. An ecologically friendly pretreatment such as autohydrolysis was selected for the manufacture of second-generation bioethanol from corn stover via whole-slurry fermentation at high-solid loadings. Temperatures from 200 to 240 ° C were set for the autohydrolysis process, and the solid and liquid phases were analyzed. Additionally, the enzymatic susceptibility of the solid phases was assessed to test the suitability of the pretreatment. Afterward, the production of bioethanol from autohydrolyzed corn stover was carried out, mixing the solid with different percentages of the autohydrolysis liquor (25%, 50%, 75%, and 100%) and water (0% of liquor), from a total whole slurry fermentation (saving energy and water in the liquid&ndash solid separation and subsequent washing of the solid phase) to employing water as only liquid medium. In spite of the challenging scenario of using the liquor fraction as liquid phase in the fermentation, values between 32.2 and 41.9 g ethanol/L and ethanol conversions up to 80% were achieved. This work exhibits the feasibility of corn stover for the production of bioethanol via a whole-slurry fermentation process. |
| Databáze: | OpenAIRE |
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