| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Cassava Pulp Enzymatic Hydrolysate as a Promising Feedstock for Ethanol Production
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| Autores: |
Valeriano,Ixthá Hasselmann
Marques,Gabriel Lessa Lisboa
Freitas,Suely Pereira
Couri,Sonia
Penha,Edmar das Mercês
Gonçalves,Márcia Monteiro Machado
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| Data: |
2018-01-01
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| Ano: |
2018
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| Palavras-chave: |
Starch waste
Enzymatic hydrolysis
Alcoholic fermentation
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| Resumo: |
ABSTRACT The aim of this study was to produce bioethanol from enzymatic hydrolysates of cassava pulp, a by-product of cassava flour manufacturing, using an alcohol-tolerant Saccharomyces cerevisiae strain. First, the best operational condition of the starch hydrolysis process was determined through a complete factorial design (24), with triplicates at the central point. The independent variables evaluated were: the concentrations of α-amylase (Termamyl 2X) and glucoamylase (AMG 300L) and both liquefaction and saccharification times. The most favorable hydrolysis condition in the assay was achieved using 0.517 mL AMG.g starch-1 and 0.270 mL Termamyl.g starch-1, with liquefaction and saccharification times of 1 and 2 h, respectively. The broth obtained at this hydrolysis condition contained a high glucose concentration (160 g.L-1). Once the best reaction conditions were determined, fermentation tests were carried out in a 3 L bioreactor, in a batch system, at 30 °C, 100 rpm and pH 5.5, using 3 g.L-1 (dry biomass) of yeast as inoculum. After 24 h of fermentation, an ethanol concentration of 68 g.L-1 was obtained, with 0.48 ethanol yield and 2.83 g.L-1.h-1 productivity. These results indicate the potential use of cassava pulp, a by-product of cassava flour industries in Brazil, as a raw material for bioethanol production.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100207
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/1678-4324-2018161214
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.61 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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