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Natural Grasslands as Lignocellulosic Biofuel Resources: Factors Affecting Fermentable Sugar Production

Author

Listed:
  • Linda Mezule

    (Water Research and Environmental Biotechnology Laboratory, Riga Technical University, P. Valdena 1-303, LV-1048 Riga, Latvia)

  • Baiba Strazdina

    (Latvian Fund for Nature, Vilandes 3-7, LV-1010 Riga, Latvia)

  • Brigita Dalecka

    (Water Research and Environmental Biotechnology Laboratory, Riga Technical University, P. Valdena 1-303, LV-1048 Riga, Latvia)

  • Eriks Skripsts

    (Bio RE LTD, Vadzu 34, LV-1024 Riga, Latvia)

  • Talis Juhna

    (Water Research and Environmental Biotechnology Laboratory, Riga Technical University, P. Valdena 1-303, LV-1048 Riga, Latvia)

Abstract

Semi-natural grassland habitats are most often limited to animal grazing and low intensity farming. Their potential in bioenergy production is complicated due to the heterogeneity, variation, accessibility, and need for complex pre-treatment/hydrolysis techniques to convert into valuable products. In this research, fermentable sugar production efficiency from various habitats at various vegetation periods was evaluated. The highest fermentable sugar yields (above 0.2 g/g volatile solids) over a period of 3 years were observed from habitats “xeric and calcareous grasslands” (Natura 2000 code: 6120) and “semi-natural dry grasslands and scrubland facies on calcareous substrates” (Natura 2000 code: 6210). Both had a higher proportion of dicotyledonous plants. At the same time, the highest productivity (above 0.7 t sugar/ha) was observed from lowland hay meadows in the initial stage of the vegetation. Thus, despite variable yield-affecting factors, grasslands can be a potential resource for energy production.

Suggested Citation

  • Linda Mezule & Baiba Strazdina & Brigita Dalecka & Eriks Skripsts & Talis Juhna, 2021. "Natural Grasslands as Lignocellulosic Biofuel Resources: Factors Affecting Fermentable Sugar Production," Energies, MDPI, vol. 14(5), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1312-:d:507640
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    References listed on IDEAS

    as
    1. Tsapekos, P. & Khoshnevisan, B. & Alvarado-Morales, M. & Symeonidis, A. & Kougias, P.G. & Angelidaki, Irini, 2019. "Environmental impacts of biogas production from grass: Role of co-digestion and pretreatment at harvesting time," Applied Energy, Elsevier, vol. 252(C), pages 1-1.
    2. Linda Mezule & Ieva Berzina & Martins Strods, 2019. "The Impact of Substrate–Enzyme Proportion for Efficient Hydrolysis of Hay," Energies, MDPI, vol. 12(18), pages 1-8, September.
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