| Texto completo | |
| Autor(es): |
Soares, Lais A.
;
Solano, Magnolia G.
;
Lindeboom, Ralph E. F.
;
Lier, Jules B. van
;
Silva, Edson L.
;
Varesche, Maria B. A.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | BIOMASS & BIOENERGY; v. 165, p. 7-pg., 2022-08-26. |
| Resumo | |
Sugarcane bagasse (SCB) is increasingly considered as a potential source for bioenergy or bulk chemicals pro-duction. However, efficient pretreatment techniques need to be developed to make full use of its potential. A central composite design was employed to evaluate the effect of temperature (146.4-213.6 C), NaOH con-centration (0.7-2.3 M) and treatment time (3.2-36.8 min) on the hydrothermal pretreatment of SCB. Glucose was the abundant fermentable sugar released in the hydrolysate (4.0 g/L) and its concentration was significantly (p-value < 0.05) affected by temperature and NaOH concentration. Sugars released in the hydrolysate and the remaining cellulose, hemicellulose, and lignin in the pretreated fiber were anaerobically co-digested in batch thermophilic assays (55 C). Propionate, one of the most promising platform chemicals, was the main metabolite produced (0.5 g/L) and its concentration was significantly affected by temperature and NaOH concentration. Both NaOH concentration and pretreatment duration significantly affected methane composition in the biogas (p-value < 0.05 and 0,10 respectively). Defluviitoga, and Methanothermobacter genera were favored in response to alkaline hydrothermal pretreatment at the central point conditions (180 C, 1.5 M NaOH, 20 min). (AU) | |
| Processo FAPESP: | 18/25748-1 - Prétratamentos hidrotérmico, solar e laser e digestão em alta pressão para otimizar a bioconversão do bagaço de cana-de-açúcar e recuperação de químicos de alto valor |
| Beneficiário: | Laís Américo Soares |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 17/07194-6 - Análise integrada da degradação de bagaço de cana de açúcar e licor de pentoses em reator anaeróbio de leito fixo compartimentado termofílico |
| Beneficiário: | Laís Américo Soares |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia |
| Beneficiário: | Marcelo Zaiat |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |