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Evaluation of Various Biomass Feedstocks for Biogas Generation at Psychrophilic and Mesophilic Temperatures at Higher Altitudes of Nepal

Author

Listed:
  • Ashma Subedi

    (Department of Environment Science and Engineering, Kathmandu University, Nepal)

  • Bivek Baral

    (Department of Mechanical Engineering, School of Engineering, Kathmandu University, Nepal)

Abstract

This study aimed at testing the feasibility of different animal manures as a substrate for biogas production at psychrophilic and mesophilic temperatures. Anaerobic digestion of animal manure at psychrophilic and mesophilic temperatures has not yet been explored in the higher altitudes in Nepal (> 3,000 meters above sea level), probably due to less effective biogas yield as cold temperature retards the growth rate of the microbes responsible for anaerobic digestion. A lab-scale anaerobic digester was constructed to run on a continuous mode process. Methane production from five different substrates, i.e., cow dung, horse dung, sheep dung, human feces, and co-digestion (combination of those substrates) was conducted at four different temperatures, i.e., 10°C, 17°C, 30°C, and 40°C, for three months. The study assessed the type of feed used in anaerobic digesters for biogas production at different temperature ranges. The results obtained reflected that the highest biogas yield potential lied in sheep dung followed by cow dung and then a combination of substrates in all the four temperatures. This study provided scientific evidence for establishing a waste based technology at higher altitudes for the production of biogas to address challenges in the energy sector and promote sustainable development.

Suggested Citation

  • Ashma Subedi & Bivek Baral, 2021. "Evaluation of Various Biomass Feedstocks for Biogas Generation at Psychrophilic and Mesophilic Temperatures at Higher Altitudes of Nepal," Journal of Development Innovations, KarmaQuest International, vol. 5(1), pages 46-62, June.
    • Handle: RePEc:kqi:journl:2021-5-1-4
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    File URL: https://www.karmaquest.org/journal/index.php/ILGDI/article/view/71/61
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    References listed on IDEAS

    as
    1. Katuwal, Hari & Bohara, Alok K., 2009. "Biogas: A promising renewable technology and its impact on rural households in Nepal," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(9), pages 2668-2674, December.
    2. Jae Hoon Jeung & Woo Jin Chung & Soon Woong Chang, 2019. "Evaluation of Anaerobic Co-Digestion to Enhance the Efficiency of Livestock Manure Anaerobic Digestion," Sustainability, MDPI, vol. 11(24), pages 1-12, December.
    3. Anahita Rabii & Saad Aldin & Yaser Dahman & Elsayed Elbeshbishy, 2019. "A Review on Anaerobic Co-Digestion with a Focus on the Microbial Populations and the Effect of Multi-Stage Digester Configuration," Energies, MDPI, vol. 12(6), pages 1-25, March.
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    More about this item

    Keywords

    anaerobic digestion; co-digestion; mesophilic; methane; psychrophilic;
    All these keywords.

    JEL classification:

    • Q43 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Energy and the Macroeconomy
    • Q53 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Air Pollution; Water Pollution; Noise; Hazardous Waste; Solid Waste; Recycling

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