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Aqueous Leaching Prior to Dewatering Improves the Quality of Solid Fuels from Grasslands

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  • Frank Hensgen

    (Department of Grassland Science and Renewable Plant Resources, Universität Kassel, Steinstrasse 19, 37213 Witzenhausen, Germany)

  • Michael Wachendorf

    (Department of Grassland Science and Renewable Plant Resources, Universität Kassel, Steinstrasse 19, 37213 Witzenhausen, Germany)

Abstract

Renewable energies are necessary to reduce greenhouse gas emissions in energy production, and biomass plays a dominant role in the renewable energy sector. Combustion of biomass constitutes an efficient conversion technique, but is hindered by harmful elements which are frequently contained in residual grassland biomass. We investigated the effect of leaching on solid fuel quality with three independent experiments including the following treatments: (1) with or without leaching, (2) with leaching at various water to silage ratios and (3) with the use of press liquid versus fresh water. Biomass was mechanically dehydrated and press cakes for combustion were produced and analyzed for their concentrations of ash, N and minerals harmful for combustion. Solid fuel quality was improved by leaching prior to dewatering, and the application of higher proportions of fresh water enabled even higher quality to be attained.

Suggested Citation

  • Frank Hensgen & Michael Wachendorf, 2018. "Aqueous Leaching Prior to Dewatering Improves the Quality of Solid Fuels from Grasslands," Energies, MDPI, vol. 11(4), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:846-:d:139619
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    References listed on IDEAS

    as
    1. Jan Hari Arti Khalsa & Frank Döhling & Florian Berger, 2016. "Foliage and Grass as Fuel Pellets–Small Scale Combustion of Washed and Mechanically Leached Biomass," Energies, MDPI, vol. 9(5), pages 1-16, May.
    2. Panwar, N.L. & Kaushik, S.C. & Kothari, Surendra, 2011. "Role of renewable energy sources in environmental protection: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(3), pages 1513-1524, April.
    3. Meike Nitsche & Frank Hensgen & Michael Wachendorf, 2017. "Energy Generation from Horse Husbandry Residues by Anaerobic Digestion, Combustion, and an Integrated Approach," Sustainability, MDPI, vol. 9(3), pages 1-13, February.
    4. Nodirjon Nurmatov & Daniel Armando Leon Gomez & Frank Hensgen & Lutz Bühle & Michael Wachendorf, 2016. "High-Quality Solid Fuel Production from Leaf Litter of Urban Street Trees," Sustainability, MDPI, vol. 8(12), pages 1-13, November.
    5. Hinrichs-Rahlwes, Rainer, 2013. "Renewable energy: Paving the way towards sustainable energy security," Renewable Energy, Elsevier, vol. 49(C), pages 10-14.
    6. Frank Hensgen & Michael Wachendorf, 2016. "The Effect of the Invasive Plant Species Lupinus polyphyllus Lindl. on Energy Recovery Parameters of Semi-Natural Grassland Biomass," Sustainability, MDPI, vol. 8(10), pages 1-14, October.
    7. Meike Nitsche & Frank Hensgen & Michael Wachendorf, 2017. "Using Grass Cuttings from Sports Fields for Anaerobic Digestion and Combustion," Energies, MDPI, vol. 10(3), pages 1-11, March.
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    Keywords

    IFBB; biomass; fuel; combustion; leaching;
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