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Research on a New Method of Water Recovery from Biogas Plant Digestate

Author

Listed:
  • Mateusz Nowak

    (Department of Biosystems Engineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznań, Poland)

  • Wojciech Czekała

    (Department of Biosystems Engineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznań, Poland)

  • Wiktor Bojarski

    (Department of Biosystems Engineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznań, Poland)

  • Jacek Dach

    (Department of Biosystems Engineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznań, Poland)

Abstract

Digestate is a product with valuable fertilizing properties, remaining after the anaerobic fermentation process. An essential feature of the substance in question is its high water content of up to 97%. To improve the fertilizer value of the digestate, it is necessary to dehydrate it to produce a concentrated product. This paper determined the possibility of dewatering the digestate using an innovative reactor design. The study, conducted on a laboratory scale, used digestate from a Polish biogas plant. The dewatering technique described in the paper is based on the evaporation and condensation of water vapor on the inner surface of the reactor dome. The condensate accumulated on the leach trough and was directed to a storage tank. During the weeks of testing, 11.5 kg of condensate was separated from the initial weight of the digestate (32 kg), with a dry weight of 6.11%. The resulting condensate from dehydration had an average pH value of 9.0 and an average ammonium nitrogen content of 2.07 g∙kg −1 . The economic calculations made in the paper allowed for estimating the expected savings associated with the management of digestate in Poland. The research showed the proposed technology’s high potential for dewatering digestate under laboratory conditions.

Suggested Citation

  • Mateusz Nowak & Wojciech Czekała & Wiktor Bojarski & Jacek Dach, 2024. "Research on a New Method of Water Recovery from Biogas Plant Digestate," Energies, MDPI, vol. 17(21), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:21:p:5505-:d:1513388
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    References listed on IDEAS

    as
    1. Rosas-Mendoza, Erik Samuel & Alvarado-Vallejo, Andrea & Vallejo-Cantú, Norma Alejandra & Velasco-Santos, Carlos & Alvarado-Lassman, Alejandro, 2024. "Valorization of the complex organic waste in municipal solid wastes through the combination of hydrothermal carbonization and anaerobic digestion," Renewable Energy, Elsevier, vol. 231(C).
    2. Taufer, Noah Luciano & Benedetti, Vittoria & Pecchi, Matteo & Matsumura, Yukihiko & Baratieri, Marco, 2021. "Coupling hydrothermal carbonization of digestate and supercritical water gasification of liquid products," Renewable Energy, Elsevier, vol. 173(C), pages 934-941.
    3. Jonathan Ries & Zhihao Chen & Yujin Park, 2023. "Potential Applications of Food-Waste-Based Anaerobic Digestate for Sustainable Crop Production Practice," Sustainability, MDPI, vol. 15(11), pages 1-12, May.
    4. Longo, Sonia & Cellura, Maurizio & Luu, Le Quyen & Nguyen, Thanh Quang & Rincione, Roberta & Guarino, Francesco, 2024. "Circular economy and life cycle thinking applied to the biomass supply chain: A review," Renewable Energy, Elsevier, vol. 220(C).
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    6. Mateusz Nowak & Wiktor Bojarski & Wojciech Czekała, 2024. "Economic and Energy Efficiency Analysis of the Biogas Plant Digestate Management Methods," Energies, MDPI, vol. 17(12), pages 1-19, June.
    7. Stürmer, B. & Leiers, D. & Anspach, V. & Brügging, E. & Scharfy, D. & Wissel, T., 2021. "Agricultural biogas production: A regional comparison of technical parameters," Renewable Energy, Elsevier, vol. 164(C), pages 171-182.
    8. Vondra, Marek & Touš, Michal & Teng, Sin Yong, 2019. "Digestate Evaporation Treatment in Biogas Plants: A Techno-economic Assessment by Monte Carlo, Neural Networks and Decision Trees," MPRA Paper 95770, University Library of Munich, Germany.
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