BioChem - DOS

Mathematical modelling for biohydrogen production by Clostridium beijerinckii

International journal of hydrogen energy

Valentí n-Reyes, Jonathan; Garcí a-Reyes, Refugio Bernardo; Garcí a-Gonzá lez, Alcione; Á lvarez-Valencia, Luis Humberto; Rivas-Garcí a, Pasiano; Cerino-Có rdova, Felipe de Jesú s

<P><B>Abstract</B></P> <P>Hydrogen is an energy source that can be produced by <I>Clostridium sporogenes</I> microorganism. In the present work, modeling of dark fermentation using <I>Clostridium beijerinckii</I> and dextrose as substrate was performed to evaluate how the gases and liquid by-products affect the biological process. A mathematical model was developed according to ADM1. The developed model takes into account biochemical reactions, physicochemical equilibrium as well as mass transfer processes during dark fermentation. Findings revealed that <I>Clostridium beijerinckii</I> reached a yield as high as 3.58 mol of H<SUB>2</SUB>/mol of dextrose and generates by-products in the aqueous phase that may either be used as raw materials in a chemical process. <I>Clostridium beijerinckii</I> is very sensitive to acid media (pH < 5.0) and shows a low rate of biohydrogen production (even the absence of metabolic activity) at pH lower than 4.5. The developed model is able to predict (R<SUP>2</SUP> > 0.95) dextrose consumption profile, cumulative biohydrogen production and the maximum concentrations of liquid by-products.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Clostridium beijerinckii</I> produced hydrogen through an anaerobic process. </LI> <LI> Butyric acid, ethanol and acetic acid are the main aqueous fermentation by-products. </LI> <LI> Hydrogen production is well predicted by the proposed model based on ADM1. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

2018

Elsevier

0360-3199

1879-3487

43

37

pp.17602-17610

10.1016/j.ijhydene.2018.07.200

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART88640096

Biohydrogen; Dark fermentation; Clostridium; ADM1; Fermentation by-products