Avaliação da hidrólise ácida para obtenção de etanol de segunda geração de palha e sabugo de milho
Avaliação da hidrólise ácida para obtenção de etanol de segunda geração de palha e sabugo de milho
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DOI: https://doi.org/10.22533/at.ed.7632427123
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Palavras-chave: Fermentação alcoólica; Escherichia coli; Biomassa lignocelulósica.
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Keywords: Alcoholic fermentation; Escherichia coli; Lignocellulosic biomass.
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Abstract: Lignocellulosic materials are excellent raw materials for producing biofuels and added-value compounds. Knowing this, this study aimed was to evaluate acid hydrolysis for producing second-generation ethanol from corn straw and corncobs, and alcoholic fermentation with Escherichia coli. The moisture content of the samples was determined and acid hydrolysis was carried out for 90 minutes at 90 ºC. The acids used to carry out the hydrolysis were nitric acid 8% (v/v), sulphuric acid 6% (v/v), hydrochloric acid 10% (v/v) and phosphoric acid 6% (v/v). The hydrolysis results showed that treatment with hydrochloric acid at 10% (v/v) was the most efficient for releasing fermentable sugars with a ºBrix of 14 for straw and 21 for cobs, followed by nitric acid at 8% (v/v) providing a ºBrix of 11.5 for straw and 12 for cobs. Sulphuric acid at 6% (v/v) showed similar values to nitric acid with 11 for straw and 12 for cobs. In comparison, the acid that showed the lowest liberation of fermentable sugars was phosphoric acid at 6% (v/v) providing a ºBrix of 8 for corn straw.
- Camila Camargo Gomes
- Everson do Prado Banczek
- Cynthia Beatriz Furstemberger
- Maria Cristina Souza
- Larissa Oliveira Berbel