Title:
Hydrogen Production from Dark Fermentation of Giant Reed (Arundo Donax L.)
Author(s):
Vasmara, C., Marchetti, R., Cianchetta, S., Galletti, S., Ceotto, E.
Document(s):
Paper
Poster
Abstract:
The aim of this study was to evaluate the effects of a thermo-alkaline pre-treatment of giant reed biomass, followed by enzymatic saccharification, on H2 yield. Giant reed biomass was pre-treated with diluted alkali (NaOH 1.2% w/w, 121 °C, 20 min). For fostering H2 production, the pre-treated solid fraction was separated from the black liquor by filtration and washed under vacuum. This residual biomass was enzymatically hydrolyzed, then centrifuged, and the supernatant was used in dark fermentation. Hydrogen production was evaluated in laboratory static mesophilic batch conditions (100 mL reactors, 1.5 g reducing sugars, 35 mL reaction volume). The impact of initial pH and possible inhibitors released by the pre-treatment on H2 production was evaluated by comparing reactors with unadjusted (5.3; NA) or adjusted pH (8.7) with 32%NaOH or black liquor (BL) derived from the pre-treatment. Initial pH 8.7 permitted to reach the highest H2 yield (366 mL, on average) which was 40% higher than in reactors with initial pH 5.3. No negative effects were detected when initial pH was adjusted with the black liquor.
Keywords:
alkali, biogas, enzymatic hydrolysis, hydrogen, Arundo donax L., anaerobic process
Topic:
Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels
Subtopic:
Synthetic fuels from biomass and hydrogen
Event:
30th European Biomass Conference and Exhibition
Session:
5BV.4.5
Pages:
885 - 887
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-5BV.4.5
Price:
FREE
