The research is divided into two articles, presenting a bioenergy territorial planning proposal for LATAM. The first part focuses on an urban circular economy (CE) model using household organic municipal waste based on source separation. The second part is related to a proposal for designing internal combustion engines for renewable and alternative gaseous fuels. This paper quantifies the bioenergy potential that could be generated for LATAM by using national population censuses-based on scientific formulation and AI-powered databases to estimate the amount of biofertilizers, biogas, and green hydrogen that can be obtained according to the proposed CE model. The sustainability of the CE model is analyzed through a thermo-economic assessment, social impact, and environmental impact, with carbon footprint measurement using a standardized calculator. Additional considerations, risk analysis...

The recovery of livestock waste through multistage anaerobic digestion represents a key strategy for producing high-efficiency liquid biofertilizers within circular economy frameworks. This study compared two underexplored substrates—guinea pig manure and vermicompost leachate (VL)—processed in series biodigesters to evaluate their nutrient composition and agronomic performance. The guinea pig manure biol exhibited higher macronutrient concentrations (N = 1.09–3.74 g L−1 ; P = 0.06–0.64 g L−1 ; K = 1.85–3.20 g L−1 ) and electrical conductivity (14.1–26.5 mS cm−1 ), while VL presented a more balanced nutrient profile (N = 0.65–0.71 g L−1 ; P = 0.04–0.09 g L−1 ; K = 2.46–3.76 g L−1 ) and slightly lower salinity (15.0–17.2 mS cm−1 ). Micronutrient levels (Fe, Mn, Zn, B) exceeded the reference thresholds established by EU Regulation 2019/1009 for liquid fe...

This study examines the socio-economic factors influencing rural households in Colombia to adopt biogas technologies, emphasizing their role in promoting sustainable development and environmental commitment. The research investigates social factors such as technology perception, capacity building, and reliance on technology. Economic factors like initial investment, operating and maintenance costs, energy savings, return on investment, by-product revenue, government incentives, alternative solution costs, financial risks, and market demand are also considered. Despite the socio-economic benefits of biodigesters, barriers such as training deficiencies, regulatory issues, and sustainability challenges delay their widespread adoption. Concerns about operational reliability, costs, and maintenance further slow their acceptance. The research presents an economic model with a viability score b...