Skip to Main content Skip to Navigation
Journal articles

A pseudo-stoichiometric dynamic model of anaerobic hydrogen production from molasses

Abstract : Dynamic modeling Despite many mathematical models available in the literature for simulation and optimization of anaerobic digestion processes, only few can accurately account for hydrogen production. In the present study, experiments were performed in a continuous stirred tank reactor with a hydraulic retention time close to 6 h. pH was regulated to 5.5 and agitation was maintained at 300 rpm. Molasses were used as substrate with feeding concentrations varying between 5 and 20 g L-1. Experimental data were used to estimate the pseudo-stoichiometric coefficients with a constrained nonlinear optimization. The obtained pseudo-stoichiometric matrix is made of two reactions, one being associated with hydrogen production and the other one with acetate production. Finally, a dynamic model is derived and is demonstrated to simulate very accurately the dynamic evolution of hydrogen production, but also biomass and intermediate compounds (i.e., individual volatile fatty acids) concentrations while being very close to the stoichiometric balance. Finally, the best hydrogen production was for a concentration of substrate of 20.09 g L-1 and a liquid feed flow of 5 L d-1 (i.e., 1.47 mol-H2 mol-glucose-1).
Document type :
Journal articles
Complete list of metadata
Contributor : Migration ProdInra Connect in order to contact the contributor
Submitted on : Saturday, May 30, 2020 - 2:37:35 PM
Last modification on : Friday, July 22, 2022 - 9:11:06 AM

Links full text



Cesar Arturo Aceves-Lara, Eric E. Latrille, Nicolas Bernet, Pierre Buffière, Jean-Philippe Steyer. A pseudo-stoichiometric dynamic model of anaerobic hydrogen production from molasses. Water Research, IWA Publishing/Elsevier, 2008, 42 (10-11), pp.2539-2550. ⟨10.1016/j.watres.2008.02.018⟩. ⟨hal-02659739⟩



Record views