Modeling of fermentative hydrogen production from sweet sorghum extract based on modified ADM1

Georgia Antonopoulou, Hariklia N. Gavala, Ioannis V. Skiadas, Gerasimos Lyberatos

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The Anaerobic digestion model 1 (ADM1) framework can be used to predict fermentative hydrogen production, since the latter is directly related to the acidogenic stage of the anaerobic digestion process. In this study, the ADM1 model framework was used to simulate and predict the process of fermentative hydrogen production from the extractable sugars of sweet sorghum biomass. Kinetic parameters for sugars' consumption and yield coefficients of acetic, propionic and butyric acid production were estimated using the experimental data obtained from the steady states of a CSTR. Batch experiments were used for kinetic parameter validation. Since the ADM1 does not account for metabolic products such as lactic acid and ethanol that are crucial during the fermentative hydrogen production process, the structure of the model was modified to include lactate and ethanol among the metabolites and to improve the predictions. The modified ADM1 simulated satisfactorily batch experiments although further modifications could be made in order to further improve the predictions for the hydrogenogenic process.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number1
Pages (from-to)191-208
ISSN0360-3199
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • ADM1
  • Fermentation
  • Hydrogen production
  • Modeling
  • Sweet sorghum
  • Sorghum extract

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