Title:
Contributing to a Jatropha-Based Biorefinery: Seed Cake Valorisation for BioH2
Author(s):
Fragoso, R., Lewis Lopes, S., Duarte, E., Marques, P.A.S.S.
Document(s):
Paper
Poster
Abstract:
Jatropha curcas L. seed cake (JSC), a solid residue remaining from seeds oil extraction, was used as substrate to fermentative hydrogen production by a strain of the bacteria Enterobacter aerogenes. Initially, runs were performed using the substrate (2.5gVSiJSC/LFermentation Medium) without pretreatment or submitted to autoclave conditions for 15 and 30min. The best bioH2 production yields (68.2mLH2/gVSiJSC and 169mLH2/LFM) were attained without pretreatment. In order to understand this behavior and aiming an improvement, by increasing the initial substrate concentration, trials were carried out using the thermal pretreated JSC as follows: (i) as total extract (powder JSC+liquid extract); (ii) as liquid extract obtained by filtration or sedimentation. The highest process yields were observed for 30' of autoclaving and using the liquid extract from sedimentation as substrate. Following these, the effect of increasing JSC concentrations (2.5-10.0gVSiJSC/LFM) was evaluated, concluding it led to an increase of the cumulative hydrogen production. However a decrease (.65%) on the specific H2 production was observed. Nevertheless, it has been proved that it is possible to use a complex industrial residue as a substrate to produce an energy vector, without the need for pretreatment up to 10gVSiJSC/LFM. This is economically advantageous and in line with the concept of biorefinery.
Keywords:
bioenergy, biofuel, biological conversion, hydrogen, waste, Jatropha curcas L. seed cake
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Biorefineries
Event:
25th European Biomass Conference and Exhibition
Session:
3BV.3.32
Pages:
1277 - 1281
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3BV.3.32
Price:
FREE
