Data di Pubblicazione:
2023
Citazione:
Dark Fermentation of Arundo donax: Characterization of the Anaerobic Microbial Consortium / G. Toscano, G. Zuccaro, A. Corsini, S. Zecchin, L. Cavalca. - In: ENERGIES. - ISSN 1996-1073. - 16:4(2023 Feb 11), pp. 1813.1-1813.16. [10.3390/en16041813]
Abstract:
The dark fermentation of lignocellulose hydrolysates is a promising process for the pro-
duction of hydrogen from renewable sources. Nevertheless, hydrogen yields are often lower than
those obtained from other carbohydrate sources due to the presence of microbial growth inhibitors in
lignocellulose hydrolysates. In this study, a microbial consortium for the production of hydrogen
by dark fermentation has been obtained from a wild methanogenic sludge by means of thermal
treatments. The consortium has been initially acclimated to a glucose-based medium and then used
as inoculum for the fermentation of Arundo donax hydrolysates. Hydrogen yields obtained from
fermentation of A. donax hydrolysates were lower than those obtained from glucose fermentation
using the same inoculum (0.30 ± 0.05 versus 1.11 ± 0.06 mol of H2 per mol of glucose equivalents).
The hydrogen-producing bacteria belonged mainly to the Enterobacteriaceae family in cultures growing
on glucose and to Clostridium in those growing on A. donax hydrolysate. In the latter cultures, Lacto-
bacillus outcompeted Enterobacteriaceae, although Clostridium also increased. Lactobacillus outgrowth
could account for the lower yields observed in cultures growing on A. donax hydrolysate.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
biohydrogen; dark fermentation; Arundo donax; lignocellulosic biomass; anaerobic consortia; Clostridium; Klebsiella; Enterobacter; lactic acid bacteria
Elenco autori:
G. Toscano, G. Zuccaro, A. Corsini, S. Zecchin, L. Cavalca
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