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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.creator | Igbojionu, Longinus Ifeanyi [UNESP] | - |
Autor(es): dc.creator | Laluce, Cecilia [UNESP] | - |
Autor(es): dc.creator | Pecoraro, Edison [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:50:29Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:50:29Z | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2019-12-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.31025/2611-4135/2020.14005 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/207518 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/207518 | - |
Descrição: dc.description | Sugarcane bagasse (SB) is made up of cellulose (32-43%), hemicellulose (19-34%) and lignin (14-30%). Due to high recalcitrant nature of SB, pretreatment is required to deconstruct its structure and enrich the cellulosic fraction. A two-stage NaOH and maleic acid pretreatment was applied to SB to enrich its cellulosic fraction. SB used in the present study is composed of cellulose (40.4 wt%), hemicellulose (20.9 wt%), lignin (22.5 wt%) and ash (4.0 wt%). After one-stage NaOH pretreatment, its cellulosic fraction increased to 61.8 wt% and later increased to 80.1 wt% after the second-stage acid pretreatment. Lignin fraction decreased to 3.0 wt% after one-stage NaOH pretreatment and remained unaffected after the acid pretreatment step. Hemicellulose fraction decreased substantially after the second-stage pretreatment with maleic acid. Pretreated SB displayed high crystallinity index and improved enzy-matic digestibility. Hydrolysates of pretreated SB contained very low amount of xy-lose and subsequent fermentation by Saccharomyces cerevisiae-IQAr/45-1 resulted to ethanol level of 8.94 g/L. Maximal ethanol yield of 0.49 g/g (95.8% of theoretical yield) and productivity of 0.28 g/L/h was attained. At the same time, biomass yield and productivity of 0.47 g/g and 0.27 g/L/h respectively were obtained. Two-stage NaOH and maleic acid pretreatment led to ~ two-fold increase in cellulosic fraction and enhanced the enzymatic digestibility of SB up to 70.4%. The resulted enzymatic hydrolysate was efficiently utilized by S. cerevisiae-IQAr/45-1 to produce high yield of ethanol. Thus, optimization of enzymatic hydrolysis at low enzyme loading is ex-pected to further improve the process and reduce cost. | - |
Descrição: dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Institute of Research in Bioenergy (IPBEN) Institute of Chemistry São Paulo State University (UNESP), Rua Prof. Francisco Degni, 55 | - |
Descrição: dc.description | Department of General and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), Rua Professor Francisco Degni, 55 | - |
Descrição: dc.description | Institute of Research in Bioenergy (IPBEN) Institute of Chemistry São Paulo State University (UNESP), Rua Prof. Francisco Degni, 55 | - |
Descrição: dc.description | Department of General and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), Rua Professor Francisco Degni, 55 | - |
Formato: dc.format | 106-113 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Detritus | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Acid pretreatment | - |
Palavras-chave: dc.subject | Cellulosic fraction | - |
Palavras-chave: dc.subject | Enzymatic hydrolysis | - |
Palavras-chave: dc.subject | Saccharomyces cerevisiae (IQAr/45-1) | - |
Palavras-chave: dc.subject | Sugarcane bagasse | - |
Palavras-chave: dc.subject | Two-stage pretreatment | - |
Título: dc.title | Two-stage alkaline and acid pretreatment applied to sugarcane bagasse to enrich the cellulosic fraction and improve enzymatic digestibility | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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