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Ammonia Recovery from Livestock Manure Digestate through an Air-Bubble Stripping Reactor: Evaluation of Performance and Energy Balance

Author

Listed:
  • Alessandro Abbà

    (Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, 25123 Brescia, Italy)

  • Marta Domini

    (Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, 25123 Brescia, Italy)

  • Marco Baldi

    (Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy)

  • Roberta Pedrazzani

    (Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy)

  • Giorgio Bertanza

    (Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, 25123 Brescia, Italy)

Abstract

The recovery of livestock manure, rich in nutrients, as fertilizer in agriculture, could pose the risk of an excessive load of nitrogen on the soil. Ammonia stripping is one of the available technologies for reducing the amount of nitrogen in the digestate obtained by the anaerobic digestion of manure. The study investigated the performance and energy consumption of a full-scale ammonia-stripping plant, equipped with a bubble reactor and working without the use of any alkaline reagent under semi-batch conditions. Stripping tests were conducted on the liquid fraction of the digestate, studying the current and optimized operative conditions of the plant. The main variables influencing the process were pH, temperature, airflow, and feed characteristics. In the experimental tests, the pH spontaneously increased to 10, without dosing basifying agents. Higher temperatures favoured the stripping process, the higher tested value being 68 °C. The airflow was kept equal to 15 Nm 3 h −1 m −3 digestate in the pre-stripping and to 60 Nm 3 h −1 m −3 digestate in the stripping reactors, during all tests. The energy requirement was completely satisfied by the CHP (combined heat and power) unit fed with the biogas produced by manure digestion. Results showed anaerobic digestion coupled with stripping to be a suitable solution for removing up to 81% of the ammonium with neither external energy input nor reagent dosage.

Suggested Citation

  • Alessandro Abbà & Marta Domini & Marco Baldi & Roberta Pedrazzani & Giorgio Bertanza, 2023. "Ammonia Recovery from Livestock Manure Digestate through an Air-Bubble Stripping Reactor: Evaluation of Performance and Energy Balance," Energies, MDPI, vol. 16(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1643-:d:1060124
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    References listed on IDEAS

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    1. Marco Baldi & Maria Cristina Collivignarelli & Alessandro Abbà & Ilaria Benigna, 2018. "The Valorization of Ammonia in Manure Digestate by Means of Alternative Stripping Reactors," Sustainability, MDPI, vol. 10(9), pages 1-14, August.
    2. Paul J. A. Withers & Colin Neal & Helen P. Jarvie & Donnacha G. Doody, 2014. "Agriculture and Eutrophication: Where Do We Go from Here?," Sustainability, MDPI, vol. 6(9), pages 1-23, September.
    3. Ali Heidarzadeh Vazifehkhoran & Alberto Finzi & Francesca Perazzolo & Elisabetta Riva & Omar Ferrari & Giorgio Provolo, 2022. "Nitrogen Recovery from Different Livestock Slurries with an Innovative Stripping Process," Sustainability, MDPI, vol. 14(13), pages 1-17, June.
    4. Barampouti, E.M. & Mai, S. & Malamis, D. & Moustakas, K. & Loizidou, M., 2020. "Exploring technological alternatives of nutrient recovery from digestate as a secondary resource," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    5. Palakodeti, Advait & Azman, Samet & Rossi, Barbara & Dewil, Raf & Appels, Lise, 2021. "A critical review of ammonia recovery from anaerobic digestate of organic wastes via stripping," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
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    Cited by:

    1. Oluwafunmilayo Abiola Aworanti & Oluseye Omotoso Agbede & Samuel Enahoro Agarry & Ayobami Olu Ajani & Oyetola Ogunkunle & Opeyeolu Timothy Laseinde & S. M. Ashrafur Rahman & Islam Md Rizwanul Fattah, 2023. "Decoding Anaerobic Digestion: A Holistic Analysis of Biomass Waste Technology, Process Kinetics, and Operational Variables," Energies, MDPI, vol. 16(8), pages 1-36, April.
    2. Ester Scotto di Perta & Raffaele Grieco & Stefano Papirio & Giovanni Esposito & Elena Cervelli & Marco Bovo & Stefania Pindozzi, 2023. "Ammonia Air Stripping from Different Livestock Effluents Prior to and after Anaerobic Digestion," Sustainability, MDPI, vol. 15(12), pages 1-10, June.
    3. Alessandro Abbà & Marta Domini & Marco Baldi & Maria Cristina Collivignarelli & Giorgio Bertanza, 2023. "Investigation of the Main Parameters Influencing the Kinetics of an Ammonia Stripping Plant Treating Swine Digestate," Sustainability, MDPI, vol. 15(13), pages 1-14, July.

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