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Design Improvements and Best Practices in Small-Scale Biodigesters for Sustainable Biogas Production: A Case Study in the Chillon Valley, Perú

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  • Yoisdel Castillo Alvarez

    (Department of Mechanical Engineering, Universidad Tecnológica del Perú, Lima 15046, Peru)

  • Reinier Jiménez Borges

    (Department of Mechanical Engineering, Faculty of Engineering, Universidad de Cienfuegos “Carlos Rafael Rodríguez”, Cienfuegos 59430, Cuba)

  • Carlos Diego Patiño Vidal

    (Department of Mechanical Engineering, Universidad Tecnológica del Perú, Lima 15046, Peru)

  • Fanny Mabel Carhuancho Leon

    (Department of Mechanical Engineering, Universidad Tecnológica del Perú, Lima 15046, Peru)

  • José Santos Pinares Buendia

    (Department of Mechanical Engineering, Universidad Tecnológica del Perú, Lima 15046, Peru)

  • Jose Alberto Samaniego Nolasco

    (Department of Mechanical Engineering, Universidad Tecnológica del Perú, Lima 15046, Peru)

Abstract

Agribusiness ranks second as the sector with the highest greenhouse gas emissions linked to methane, constituting a crucial challenge for global sustainability. Although its impact on climate change is considerable, small rural farmers do not have effective technologies to manage the organic waste derived from their daily activities. In this context, anaerobic digestion is an innovative solution that converts waste into biogas and biofertilizers, promoting a sustainable and circular approach. However, its implementation faces significant barriers due to inadequate designs and poor operational practices, which makes its adoption difficult in rural areas. This applied theoretical research seeks to overcome these barriers by improving the design and operation of small-scale biogas plants. The system studied operates at 70% of its capacity, with a hydraulic retention time of 20 days and a feed of 4 kg organic matter. The substrates considered were 30% organic waste and 70% bovine manure, achieving an average production of 63.75 L CH 4 /kg of organic matter, which exceeded the usual yields of small biodigesters. A mathematical model was created and applied to the case study with an R 2 correlation of 98% and a pseudo-R 2 of 89.5%, evidencing a remarkable predictive capacity. This biogas plant model is efficient and sustainable, and it is presented as a viable solution for small rural farmers.

Suggested Citation

  • Yoisdel Castillo Alvarez & Reinier Jiménez Borges & Carlos Diego Patiño Vidal & Fanny Mabel Carhuancho Leon & José Santos Pinares Buendia & Jose Alberto Samaniego Nolasco, 2025. "Design Improvements and Best Practices in Small-Scale Biodigesters for Sustainable Biogas Production: A Case Study in the Chillon Valley, Perú," Energies, MDPI, vol. 18(2), pages 1-31, January.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:2:p:338-:d:1566612
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    References listed on IDEAS

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