HRT control as a strategy to enhance continuous hydrogen production from sugarcane juice under mesophilic and thermophilic conditions in AFBRs

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논문

HRT control as a strategy to enhance continuous hydrogen production from sugarcane juice under mesophilic and thermophilic conditions in AFBRs

학술지

International journal of hydrogen energy

저자명

Ferreira, Tiago Borges; Rego, Gabriel Catucci; Ramos, Lucas Rodrigues; Menezes, Camila Aparecida de; Soares, Laí s Amé rico; Sakamoto, Isabel Kimiko; Varesche, Maria Bernadete Amâ ncio; Silva, Edson Luiz

초록

Abstract The objective of this study was to evaluate the effects of hydraulic retention time (HRT) (8–1 h) on H2 production from sugarcane juice (5000 mg COD L−1) in mesophilic (30 °C, AFBR-30) and thermophilic (55 °C, AFBR-55) anaerobic fluidized bed reactors (AFBRs). At HRTs of 8 and 1 h in AFBR-30, the H2 production rates were 60 and 116 mL H2 h−1 L−1, the hydrogen yields were 0.60 and 0.10 mol H2 mol−1 hexose, and the highest bacterial diversities were 2.47 and 2.34, respectively. In AFBR-55, the decrease in the HRT from 8 to 1 h increased the hydrogen production rate to 501 mL H2 h−1 L−1 at the HRT of 1 h. The maximum hydrogen yield of 1.52 mol H2 mol−1 hexose was observed at the HRT of 2 h and was associated with the lowest bacterial diversity (0.92) and highest bacterial dominance (0.52). Highlights <UL> <LI> Decreasing HRT favored H2 yield and production rate from sugarcane juice. </LI> <LI> Thermophilic conditions favored ethanol-type fermentation. </LI> <LI> Mesophilic conditions favored the aceto-butyric pathway. </LI> <LI> Mesophilic H2 production was associated with higher bacterial diversity. </LI> <LI> Thermophilic H2 production was associated with higher bacterial dominance. </LI> </UL> Graphical abstract [DISPLAY OMISSION]

발행연도

2019

발행기관

Elsevier

ISSN

0360-3199

ISSN

1879-3487

권

호

페이지

pp.19719-19729