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Organic Waste Generation and Its Valorization Potential through Composting in Shashemene, Southern Ethiopia

Author

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  • Oukula Obsa

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia
    Department of Natural Resource Management, College of Agriculture, Wolaita Sodo University, Wolaita Sodo P.O. Box 138, Ethiopia)

  • Menfese Tadesse

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia)

  • Dong-Gill Kim

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia)

  • Zeleke Asaye

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia)

  • Fantaw Yimer

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia)

  • Mersha Gebrehiwot

    (Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene P.O. Box 128, Ethiopia)

  • Nicolas Brüggemann

    (Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences (IBG-3, Agrosphere), 52425 Jülich, Germany)

  • Katharina Prost

    (Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences (IBG-3, Agrosphere), 52425 Jülich, Germany)

Abstract

Composting organic waste and human excreta could significantly reduce the amount of waste dumped and increase soil fertility and agricultural yields. However, studies focusing on the replacement of mineral fertilizer with compost from these resources are rare. The presented study quantifies the potential of human excreta and other organic waste for compost production. During wet and dry seasons, the generation and composition of household solid waste (HSW) was measured from three wealth categories: poor, medium, and rich, as well as the organic waste generated from 20 commercial facilities. Furthermore, the amount of human excreta, when converting unimproved into ecological sanitation facilities, was assessed. The HSW generation was significantly higher in the wet (0.77 ± 0.07 kg fresh weight (FW) cap −1 day −1 ) compared to the dry season (0.54 ± 0.04 kg FW cap −1 day −1 ). Organic waste was the main component of HSW in the dry and wet seasons, accounting for 84% and 76% of the total HSW, respectively. Annually, about 6824 Mg of organic dry matter could be collected from households, 212 Mg from commercial units, and 12,472 Mg from ecological sanitation. With these resources, 11,732 Mg of compost could be produced annually and used for fertilizing 470 ha of farmland, completely replacing mineral fertilizer.

Suggested Citation

  • Oukula Obsa & Menfese Tadesse & Dong-Gill Kim & Zeleke Asaye & Fantaw Yimer & Mersha Gebrehiwot & Nicolas Brüggemann & Katharina Prost, 2022. "Organic Waste Generation and Its Valorization Potential through Composting in Shashemene, Southern Ethiopia," Sustainability, MDPI, vol. 14(6), pages 1-19, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:6:p:3660-:d:775702
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    References listed on IDEAS

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    1. repec:wbk:wbpubs:15790 is not listed on IDEAS
    2. Lemesa Hirpe & Chunho Yeom, 2021. "Municipal Solid Waste Management Policies, Practices, and Challenges in Ethiopia: A Systematic Review," Sustainability, MDPI, vol. 13(20), pages 1-16, October.
    3. Emana, Bezabih & Afari-Sefa, Victor & Dinssa, Fekadu F. & Ayana, Amsalu & Balemi, Tesfaye & Temesgen, Milkessa, 2015. "Characterization and Assessment of Vegetable Production and Marketing Systems in the Humid Tropics of Ethiopia," Quarterly Journal of International Agriculture, Humboldt-Universitaat zu Berlin, vol. 54(2), pages 1-25, May.
    4. Philippe, Féniel & Culot, Marc, 2009. "Household solid waste generation and characteristics in Cape Haitian city, Republic of Haiti," Resources, Conservation & Recycling, Elsevier, vol. 54(2), pages 73-78.
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    Cited by:

    1. Zeleke Asaye & Dong-Gill Kim & Fantaw Yimer & Katharina Prost & Oukula Obsa & Menfese Tadesse & Mersha Gebrehiwot & Nicolas Brüggemann, 2022. "Effects of Combined Application of Compost and Mineral Fertilizer on Soil Carbon and Nutrient Content, Yield, and Agronomic Nitrogen Use Efficiency in Maize-Potato Cropping Systems in Southern Ethiopi," Land, MDPI, vol. 11(6), pages 1-20, May.
    2. Katharina A. Werner & Daniela Castro-Herrera & Fantaw Yimer & Menfese Tadesse & Dong-Gill Kim & Katharina Prost & Nicolas Brüggemann & Elisabeth Grohmann, 2023. "Microbial Risk Assessment of Mature Compost from Human Excreta, Cattle Manure, Organic Waste, and Biochar," Sustainability, MDPI, vol. 15(5), pages 1-11, March.

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