Fermentação alcoólica de melaço com alta concentração de açúcar: efeito da esterilização do mosto e tratamento ácido da levedura

Cabral, Graziele Bortolozzo

doi:10.11606/d.11.2020.tde-14082020-081941

DOI: 10.11606/d.11.2020.tde-14082020-081941

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Fermentação alcoólica de melaço com alta concentração de açúcar: efeito da esterilização do mosto e tratamento ácido da levedura

Graziele Bortolozzo Cabral¹

Abstract: Fermentação alcoólica de melaço com alta concentração de açúcar: efeito da esterilização do mosto e tratamento ácido da levedura Graziele Bortolozzo Cabral Dissertação apresentada para obtenção do título de Mestra em Ciências. Área de concentração: Ciências e Tecnologia de Alimentos Piracicaba 2020 Graziele Bortolozzo Cabral Engenheira de Alimentos Fermentação alcoólica de melaço com alta concentração de açúcar: efeito da esterilização do mosto e tratamento ácido da levedura versão revisada de acordo com a res… Show more

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Cited by 2 publications

References 16 publications

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Formation of isoamyl alcohol and isobutanol in the fermentation of sugarcane molasses in a microdistillery: evaluation of pH, refrigeration and supplementation factors

Santos,

de Almeida,

Andrade

et al. 2024

Preprint

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Fusel oil is a mixture of higher alcohols that are formed during fermentation, and the main constituents are isoamyl alcohol and isobutanol. Although their presence in fermented musts is detrimental to the distillation process and ethanol quality, the aforementioned higher alcohols are widely used, especially in the fine chemical industry. On the other hand, the quality and quantity of fusel oil depend on various factors, including raw materials and fermentation conditions. The aim of this study was to investigate the effects of pH, refrigeration, and supplementation on the formation of isoamyl alcohol and isobutanol during the fermentation of molasses must in a microdistillery. The fermentations were conducted in batches that were fed with 25 °Brix must and 25% v/v commercial dry yeast for 10 hours. A complete 2³ factorial design was used to assess the effects of the studied factors and their interactions on the response variables: fermentation efficiency (nf), process efficiency (np), ethanol productivity (P), substrate-to-cell conversion factor (YX/S), isoamyl alcohol produced (A), isobutanol produced (B) and the A/B Ratio between these alcohols. For statistical analysis, analysis of variance (ANOVA) and Tukey’s test were used for mean comparisons. The results of the substrate-to-cell conversion factor (YX/S) indicated good yeast performance under different fermentation conditions. The interaction effects among the evaluated factors significantly influenced the formation of isoamyl alcohol and isobutanol, as well as the A/B Ratio.

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Formation of isoamyl alcohol and isobutanol in the fermentation of sugarcane molasses in a microdistillery: evaluation of pH, refrigeration and supplementation factors

Santos,

de Almeida,

Andrade

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Isoamyl alcohol and isobutanol production in sugarcane molasses fermentation in a microdistillery: pH, refrigeration, and supplementation effects

Santos,

Almeida,

Andrade

et al. 2024

Preprint

View full text Add to dashboard Cite

Fusel oil, a blend of higher alcohols generated during fermentation, predominantly comprises isoamyl alcohol and isobutanol. Despite their adverse effects on distillation and ethanol quality, these alcohols find widespread use, notably in the fine chemical industry. Fusel oil quality and quantity vary due to multiple factors, including raw materials and fermentation conditions. This study aimed to investigate the effects of pH, refrigeration, and supplementation on isoamyl alcohol and isobutanol formation during molasses must fermentation in a microdistillery. The fermentations were conducted in batches that were fed with 25 °Brix must and 25% v/v commercial dry yeast for 10 hours. A complete 2³ factorial design was used to assess the effects of the studied factors and their interactions on the response variables: fermentation efficiency (nf), process efficiency (np), ethanol productivity (P), substrate-to-cell conversion factor (YX/S), isoamyl alcohol produced (A), isobutanol produced (B) and the A/B Ratio between these alcohols. Statistical analysis employed ANOVA and Tukey’s test. The results of the substrate-to-cell conversion factor (YX/S) indicated good yeast performance under different fermentation conditions. The interaction effects among the evaluated factors significantly influenced the formation of isoamyl alcohol and isobutanol, as well as the A/B Ratio.

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Fermentação alcoólica de melaço com alta concentração de açúcar: efeito da esterilização do mosto e tratamento ácido da levedura

Cited by 2 publications

References 16 publications

Formation of isoamyl alcohol and isobutanol in the fermentation of sugarcane molasses in a microdistillery: evaluation of pH, refrigeration and supplementation factors

Formation of isoamyl alcohol and isobutanol in the fermentation of sugarcane molasses in a microdistillery: evaluation of pH, refrigeration and supplementation factors

Isoamyl alcohol and isobutanol production in sugarcane molasses fermentation in a microdistillery: pH, refrigeration, and supplementation effects

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