Evaluation of the Dark Fermentation Process as an Alternative for the Energy Valorization of the Organic Fraction of Municipal Solid Waste (OFMSW) for Bogotá, Colombia

In the context of valorizing the organic fraction of urban solid waste (OFMSW) in megacities, dark fermentation emerges as a central strategy alongside composting and anaerobic digestion. This article focuses on assessing the environmental, technical, and energy viability of dark fermentation using...

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Published in:Applied sciences 2024-04, Vol.14 (8), p.3437
Main Authors: Becerra-Quiroz, Ana-Paola, Rodríguez-Morón, Santiago-Andrés, Acevedo-Pabón, Paola-Andrea, Rodrigo-Ilarri, Javier, Rodrigo-Clavero, María-Elena
Format: Article
Language:English
Subjects:
Analysis
Bacteria
Biogas
biohydrogen production
Biomass energy
biorefineries
Carbohydrates
Carbon dioxide
Circular economy
dark fermentation
Energy
Energy management systems
Evaluation
Fatty acids
Fermentation
Hydrogen
Landfill
Megacities
Metabolism
Metabolites
Microorganisms
Municipal solid waste
OFMSW
Oxidation
sustainable biofuels
Waste materials
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Summary:In the context of valorizing the organic fraction of urban solid waste (OFMSW) in megacities, dark fermentation emerges as a central strategy alongside composting and anaerobic digestion. This article focuses on assessing the environmental, technical, and energy viability of dark fermentation using life cycle assessment (LCA) and circular economy principles. Dark fermentation for biohydrogen production is an active and promising research field in the quest for sustainable biofuels. In this context, defining operational parameters such as organic loading and the substrate-inoculum ratio is relevant for achieving better production yields. Laboratory tests were conducted using organic loading values of 5, 10, and 15 g of volatile solids per liter (gVS/L) and with substrate-inoculum ratios (s/x) of 1, 0.75, and 0.5 g of volatile solids of substrate per gram of volatile solids of inoculum (gVSs/gVSi). The combination with the best performance turned out to be an initial organic loading of 10 gVS/L and an s/x of 1 gVSs/gVSi. From this result, it was determined that the s/x had a greater impact on production. Finally, a valorization plant was dimensioned with the scaled-up process, starting from the municipal solid waste generated by Bogotá projected for 2042. The scaling was demonstrated to be energetically sustainable, producing a power of 2,368,358.72 kWh per day.
ISSN:2076-3417
2076-3417
DOI:10.3390/app14083437