| Title | A thermo-economic analysis of a circular economy model for biomass in South America producing biofertilizers and biogas from municipal solid waste |
|---|---|
| ID_Doc | 2544 |
| Authors | Montoya, JPG; Alvarez, YC; Magalha, RFD; Lermen, FH |
| Title | A thermo-economic analysis of a circular economy model for biomass in South America producing biofertilizers and biogas from municipal solid waste |
| Year | 2024 |
| Published | |
| Abstract | The linear economy model has caused many impacts associated with increased urban population and municipal solid waste generation worldwide. Through anaerobic digestion, the circular bioeconomy of biomass (methanogenic) provides a fuel (biogas) and an environmentally sustainable biofertilizer. This theoretical-descriptive research proposes a circular economic model based on the design of biorefineries using recycled biomass in urban areas. The model considers a minimum of 1.8 million people to generate approximately 650 tons/day for its application. The biorefinery configuration of the model consists of 12 biodigesters of 5400 m3 unit capacity and a spark ignition engine of 2 MW. The model is validated by employing a case study in the main urban cities of South America. Brazil with about 161,000 m3/day of biogas and 3100 tons/day of biofertilizer, and Paraguay, with 10,000 m3/day of biogas and 500 tons/day of biofertilizer, are the ones with the highest and lowest energy potential, respectively. The internal rate of return on investment in the case study is around 69%. The proposed circular economy model reduces greenhouse gas emissions and environmental impacts of municipal solid waste; Also, the environmental impact was estimated using different equivalence indicators between green electricity energy and carbon footprint avoided. |
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