Effect of substrate concentration on fermentative hydrogen production from sweet sorghum extract

G Antonopoulou, Hariklia N. Gavala, Ioannis Skiadas, G. Lyberatos

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The present study focuses on the influence of substrate concentration on the fermentative hydrogen production from the sugars of sweet sorghum extract, in a continuous stirred tank bioreactor. The reactor was operated at a Hydraulic Retention Time of 12 h and substrate concentrations ranging from 9895 to 20990 mg/L, in glucose equivalents. The maximum hydrogen production rate and yield were obtained at the concentration of 17000 mg carbohydrates/L and were 2.93 ± 0.09 L H2 /L reactor /d and 0.74 ± 0.02 mol H2 / mol glucose consumed or 8.81 ± 0.02 LH2 / kg sweet sorghum, respectively. The main metabolic product at all steady states was butyric acid while ethanol production was high at high substrate
concentrations. The experiments showed that the hydrogen productivity depends significantly on the initial carbohydrates concentration which also influences the distribution of the metabolic products.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number8
Pages (from-to)4843-4851
ISSN0360-3199
DOIs
Publication statusPublished - Apr 2011

Fingerprint

sorghum
hydrogen production
Carbohydrates
Hydrogen production
Glucose
Butyric acid
carbohydrates
Substrates
Bioreactors
glucose
Sugars
Ethanol
Productivity
reactors
Hydraulics
bioreactors
Hydrogen
butyric acid
products
sugars

Keywords

  • Sweet sorghum, hydrogen, substrate concentration, continuous fermentation, biohydrogen, fermentative hydrogen production

Cite this

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abstract = "The present study focuses on the influence of substrate concentration on the fermentative hydrogen production from the sugars of sweet sorghum extract, in a continuous stirred tank bioreactor. The reactor was operated at a Hydraulic Retention Time of 12 h and substrate concentrations ranging from 9895 to 20990 mg/L, in glucose equivalents. The maximum hydrogen production rate and yield were obtained at the concentration of 17000 mg carbohydrates/L and were 2.93 ± 0.09 L H2 /L reactor /d and 0.74 ± 0.02 mol H2 / mol glucose consumed or 8.81 ± 0.02 LH2 / kg sweet sorghum, respectively. The main metabolic product at all steady states was butyric acid while ethanol production was high at high substrate concentrations. The experiments showed that the hydrogen productivity depends significantly on the initial carbohydrates concentration which also influences the distribution of the metabolic products.",
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Effect of substrate concentration on fermentative hydrogen production from sweet sorghum extract. / Antonopoulou, G; Gavala, Hariklia N.; Skiadas, Ioannis; Lyberatos, G.

In: International Journal of Hydrogen Energy, Vol. 36, No. 8, 04.2011, p. 4843-4851.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effect of substrate concentration on fermentative hydrogen production from sweet sorghum extract

AU - Antonopoulou, G

AU - Gavala, Hariklia N.

AU - Skiadas, Ioannis

AU - Lyberatos, G.

PY - 2011/4

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N2 - The present study focuses on the influence of substrate concentration on the fermentative hydrogen production from the sugars of sweet sorghum extract, in a continuous stirred tank bioreactor. The reactor was operated at a Hydraulic Retention Time of 12 h and substrate concentrations ranging from 9895 to 20990 mg/L, in glucose equivalents. The maximum hydrogen production rate and yield were obtained at the concentration of 17000 mg carbohydrates/L and were 2.93 ± 0.09 L H2 /L reactor /d and 0.74 ± 0.02 mol H2 / mol glucose consumed or 8.81 ± 0.02 LH2 / kg sweet sorghum, respectively. The main metabolic product at all steady states was butyric acid while ethanol production was high at high substrate concentrations. The experiments showed that the hydrogen productivity depends significantly on the initial carbohydrates concentration which also influences the distribution of the metabolic products.

AB - The present study focuses on the influence of substrate concentration on the fermentative hydrogen production from the sugars of sweet sorghum extract, in a continuous stirred tank bioreactor. The reactor was operated at a Hydraulic Retention Time of 12 h and substrate concentrations ranging from 9895 to 20990 mg/L, in glucose equivalents. The maximum hydrogen production rate and yield were obtained at the concentration of 17000 mg carbohydrates/L and were 2.93 ± 0.09 L H2 /L reactor /d and 0.74 ± 0.02 mol H2 / mol glucose consumed or 8.81 ± 0.02 LH2 / kg sweet sorghum, respectively. The main metabolic product at all steady states was butyric acid while ethanol production was high at high substrate concentrations. The experiments showed that the hydrogen productivity depends significantly on the initial carbohydrates concentration which also influences the distribution of the metabolic products.

KW - Sweet sorghum, hydrogen, substrate concentration, continuous fermentation, biohydrogen, fermentative hydrogen production

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DO - 10.1016/j.ijhydene.2011.01.077

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VL - 36

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EP - 4851

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

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ER -