Title:
Assessment of Biogas Production Pathways: Application to Portugal
Author(s):
Lopes, M., Baptista, P., Duarte, E., Moreira, A.
Document(s):
Paper
Poster
Abstract:
Specific EU policies have been designed to promote the use of biogas as a greener alternative energy to natural gas. In Portugal, the potential of producing biogas has not been extensively studied to date. In this work, experiments to test co-digestion of horse manure and pig slurry were conducted in a lab-scale CSTR and real-scale potential production of biogas from this case study and others, as well as the energy and environmental impacts, are analysed. Three biogas utilisation pathways were considered: combustion in CHP engine, upgrading for partial natural gas substitution and upgrading for utilisation as transport fuel. The results indicate that co-digestion of horse manure and pig slurry is feasible, provided an adequate pre-treatment is applied, and the best mixture (HM:PS in terms of %VS inlet) is 20:80, with a SMP of 258.3 m3.tonVS-1. The national biogas and biomethane productions estimated were of 592.5 Mm3 and 310.0 Mm3, respectively. First scenario showed the least energy consumption, followed by the second (+13.5%) and the third (+21.1%). Associated emissions had the same tendency, with first scenario having the lowest, followed by the second (+37.2%) and third (+39.1%). Biomethane was proven to be a sustainable and greener energy alternative to natural gas.
Keywords:
biogas, impacts, potential, residues
Topic:
Biomass Policies, Markets and Sustainability
Subtopic:
Environmental impacts of bioenergy
Event:
25th European Biomass Conference and Exhibition
Session:
4AV.2.26
Pages:
1749 - 1758
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-4AV.2.26
Price:
FREE
