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Duckweed from a Biorefinery System: Nutrient Recovery Efficiency and Forage Value

Author

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  • Marcin Sońta

    (Department of Animal Breeding, Institute of Animal Sciences, Warsaw University of Life Sciences—SGGW, Ciszewskiego 8, 02-786 Warsaw, Poland)

  • Andrzej Łozicki

    (Division of Animal Nutrition, Institute of Animal Sciences, Warsaw University of Life Sciences—SGGW, Ciszewskiego 8, 02-786 Warsaw, Poland)

  • Magdalena Szymańska

    (Department of Agricultural Chemistry, Institute of Agricultural, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland)

  • Tomasz Sosulski

    (Department of Agricultural Chemistry, Institute of Agricultural, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland)

  • Ewa Szara

    (Department of Agricultural Chemistry, Institute of Agricultural, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland)

  • Adam Wąs

    (Department of Economics and Organisation of Enterprises, Institute of Economics and Finance, Warsaw University of Life Sciences—SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland)

  • Gijs W. P. van Pruissen

    (Cornelissen Consulting Services BV, Binnensingel 3, 7411 PL Deventer, The Netherlands)

  • René L. Cornelissen

    (Cornelissen Consulting Services BV, Binnensingel 3, 7411 PL Deventer, The Netherlands)

Abstract

This paper presents the results of an interdisciplinary study aimed at assessing the possibility of using duckweed to purify and recover nutrients from the effluent remaining after struvite precipitation and ammonia stripping from a liquid fraction of anaerobic digestate in a biorefinery located at a Dutch dairy cattle production farm. The nutritional value of duckweed obtained in a biorefinery was assessed as well. Duckweed ( Lemna minuta ) was cultured on a growth medium with various concentrations of effluent from a biorefinery (EFL) and digested slurry (DS) not subjected to the nutrient recovery process. The study’s results showed that duckweed culture on the media with high contents of DS or EFL was impossible because they both inhibited its growth. After 15 days of culture, the highest duckweed yield was obtained from the ponds with DS or EFL contents in the medium reaching 0.39% (37.8 g fresh matter (FM) and 16.8 g FM per 8500 mL of the growth medium, respectively). The recovery of N by duckweed was approximately 75% and 81%, whereas that of P was approximately 45% and 55% of the growth media with EFL 0.39% and DS 0.39% , respectively. Duckweed obtained from the biorefinery proved to be a valuable high-protein feedstuff with high contents of α-tocopherol and carotenoids. With a protein content in duckweed approximating 35.4–36.1%, it is possible to obtain 2–4 t of protein per 1 ha from EFL 0.39% and DS 0.39% ponds, respectively.

Suggested Citation

  • Marcin Sońta & Andrzej Łozicki & Magdalena Szymańska & Tomasz Sosulski & Ewa Szara & Adam Wąs & Gijs W. P. van Pruissen & René L. Cornelissen, 2020. "Duckweed from a Biorefinery System: Nutrient Recovery Efficiency and Forage Value," Energies, MDPI, vol. 13(20), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:20:p:5261-:d:425818
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    References listed on IDEAS

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    1. Magdalena Szymańska & Ewa Szara & Adam Wąs & Tomasz Sosulski & Gijs W.P. van Pruissen & René L. Cornelissen, 2019. "Struvite—An Innovative Fertilizer from Anaerobic Digestate Produced in a Bio-Refinery," Energies, MDPI, vol. 12(2), pages 1-9, January.
    2. Magdalena Szymańska & Tomasz Sosulski & Ewa Szara & Adam Wąs & Piotr Sulewski & Gijs W.P. van Pruissen & René L. Cornelissen, 2019. "Ammonium Sulphate from a Bio-Refinery System as a Fertilizer—Agronomic and Economic Effectiveness on the Farm Scale," Energies, MDPI, vol. 12(24), pages 1-15, December.
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