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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Simultaneous hydrogen and ethanol production in a thermophilic AFBR: a comparative approach between cellulosic hydrolysate single fermentation and the fermentation of glucose and xylose as co-substrates

Texto completo
Autor(es):
Santos Lopes, Helberth Junnior [1] ; Ramos, Lucas Rodrigues [1] ; de Menezes, Camila Aparecida [2] ; Silva, Edson Luiz [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Chem Engn, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Dept Hydraul & Sanitat, Av Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Cellulose; v. 27, n. 5 JAN 2020.
Citações Web of Science: 0
Resumo

This study evaluated the effect of hydraulic retention time (HRT) on the simultaneous hydrogen and ethanol production in two anaerobic fluidized bed reactors (55 degrees C) from mono-fermentation of cellulosic hydrolysate (AFBR-C) and the fermentation of glucose and xylose as co-substrates (AFBR-GX). In AFBR-C, the HRT was decreased from 24 to 8 h, while in AFBR-GX, the HRT was decreased from 16 to 0.5 h. The carbohydrate concentration was maintained at 4 g/L (AFBR-GX) and 2 g/L (AFBR-C). In AFBR-C, the main results observed by decreasing the HRT from 24 to 8 h were the increase in H-2 yield (0.6-1.1 mol H-2/mol hexose) and ethanol concentration (0.02-0.48 g/L). However, the H-2 yield in AFBR-GX decreased from 0.4 to 0.1 mol H-2/mol hexose by decreasing the HRT from 16 to 0.5 h. Additionally, the shortest HRTs applied to the AFBR-C (8 h) and AFBR-GX (0.5 h) resulted in the maximum hydrogen production rates of 115.7 and 279.9 mL H-2/h L, the maximum energy yields of 7.4 and 47.7 kJ/h L, and EtOH molar fractions of 58.9 and 50.2%, respectively. {[}GRAPHICS] . (AU)

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