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Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms

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  • Cristina Sáez Blázquez

    (Department of Electric, System and Automatic Engineering, University of León, 24071 León, Spain
    Department of Cartographic and Land Engineering, Higher Polytechnic School of Avila, University of Salamanca, Hornos Caleros 50, 05003 Avila, Spain)

  • David Borge-Diez

    (Department of Electric, System and Automatic Engineering, University of León, 24071 León, Spain)

  • Ignacio Martín Nieto

    (Department of Cartographic and Land Engineering, Higher Polytechnic School of Avila, University of Salamanca, Hornos Caleros 50, 05003 Avila, Spain)

  • Miguel Ángel Maté-González

    (Escuela Técnica Superior de Ingenieros en Topografía, Geodesia y Cartografía, Departamento de Ingeniería Cartográfica, Geodésica y Fotogrametría, Universidad Politécnica de Madrid, Campus Sur, A-3, Km 7, 28031 Madrid, Spain)

  • Arturo Farfán Martín

    (Department of Cartographic and Land Engineering, Higher Polytechnic School of Avila, University of Salamanca, Hornos Caleros 50, 05003 Avila, Spain)

  • Diego González-Aguilera

    (Department of Cartographic and Land Engineering, Higher Polytechnic School of Avila, University of Salamanca, Hornos Caleros 50, 05003 Avila, Spain)

Abstract

The pig farm sector has been developing rapidly over recent decades, leading to an increase in the production of slurry and associated environmental impacts. Breeding farms require the maintenance of adequate indoor thermal environments, resulting in high energy demands that are frequently met by fossil fuels and electricity. Farm heating systems and the storage of slurry constitute considerable sources of polluting gases. There is thus a need to highlight the advantages that new green heating solutions can offer to reduce the global environmental impact of pig farming. This research presents an overview of alternative pig farm slurry technology, using geothermal heat pumps, which reduces the harmful effects of slurry and improves the energy behavior of farms. The results reflect the environmental benefits of this solution in terms of reducing carbon and hydric footprints. Reducing the temperature of slurry with the geothermal heat pump of the system also reduces the annual amount of greenhouse gases and ammonia emissions, and, via the heat pump, slurry heat is used for installation heating. Annual emissions of CO 2 e could be reduced by more than half, and ammonia emissions could also experience a significant reduction if the slurry technology is installed. Additional advantages confirm the positive impact that the expansion of this renewable technology could have on the global pig farm sector.

Suggested Citation

  • Cristina Sáez Blázquez & David Borge-Diez & Ignacio Martín Nieto & Miguel Ángel Maté-González & Arturo Farfán Martín & Diego González-Aguilera, 2022. "Geothermal Heat Pumps for Slurry Cooling and Farm Heating: Impact and Carbon Footprint Reduction in Pig Farms," Sustainability, MDPI, vol. 14(10), pages 1-17, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:10:p:5792-:d:812775
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    References listed on IDEAS

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    1. Alberti, Luca & Antelmi, Matteo & Angelotti, Adriana & Formentin, Giovanni, 2018. "Geothermal heat pumps for sustainable farm climatization and field irrigation," Agricultural Water Management, Elsevier, vol. 195(C), pages 187-200.
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    3. Federica Borgonovo & Cecilia Conti & Daniela Lovarelli & Valentina Ferrante & Marcella Guarino, 2019. "Improving the Sustainability of Dairy Slurry by A Commercial Additive Treatment," Sustainability, MDPI, vol. 11(18), pages 1-14, September.
    4. Cristina Sáez Blázquez & Arturo Farfán Martín & Ignacio Martín Nieto & Diego González-Aguilera, 2018. "Economic and Environmental Analysis of Different District Heating Systems Aided by Geothermal Energy," Energies, MDPI, vol. 11(5), pages 1-17, May.
    5. Borge-Diez, David & Colmenar-Santos, Antonio & Pérez-Molina, Clara & López-Rey, África, 2015. "Geothermal source heat pumps under energy services companies finance scheme to increase energy efficiency and production in stockbreeding facilities," Energy, Elsevier, vol. 88(C), pages 821-836.
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    Cited by:

    1. Carlos Lorente Rubio & Jorge Luis García-Alcaraz & Juan Carlos Sáenz-Diez Muro & Eduardo Martínez-Cámara & Agostino Bruzzone & Julio Blanco-Fernández, 2022. "Environmental Impact Comparison of Geothermal Alternatives for Conventional Boiler Replacement," Energies, MDPI, vol. 15(21), pages 1-15, November.

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