2024-03-28T21:19:32Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/235252021-06-24T07:34:27Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061
Toledo Cervantes, Alma
Estrada, José María
Lebrero Fernández, Raquel
Muñoz Torre, Raúl
2017
Producción Científica
Two biogas upgrading technologies, viz. an innovative algal-bacterial photobioreactor and a conventional activated carbon filter coupled with a water scrubber, were comparatively evaluated in terms of environmental, economic and social performance by using the IChemE Sustainability Metrics. The upgrading of 300 Nm3/h of biogas generated from the anaerobic digestion of mixed sludge in a wastewater treatment plant was used as a model scenario for the comparative analysis. Despite the algal-bacterial photobioreactor entailed 1860 times higher land requirements, the two-stage physical/chemical technology exhibited × 3.8 higher energy consumptions and larger environmental impacts in terms of material and water consumption and greenhouse gas emissions (the latter by a factor of ~ 45). The investment cost for the algal-bacterial photobioreactor was 1.6 times higher than that of its physical/chemical counterpart due to the biomass drying unit required to produce an algae-based fertilizer. However, the operating cost of the physical/chemical technology was ~ 7 times higher due to the frequent replacement of the activated carbon. A further analysis of the net present value (NPV 20) revealed that photosynthetic upgrading would yield revenues from year 5 of operation mainly due to the sale of the algal bio-fertilizer produced, even without tax incentives for bio-methane.
application/pdf
http://uvadoc.uva.es/handle/10324/23525
eng
Elsevier
A comparative analysis of biogas upgrading technologies: Photosynthetic vs physical/chemical processes
info:eu-repo/semantics/article
TEXT
UVaDOC. Repositorio Documental de la Universidad de Valladolid
Hispana