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Energy Potential of Urban Green Waste and the Possibility of Its Pelletization

Author

Listed:
  • Vladimír Mašán

    (Department of Horticultural Machinery, Faculty of Horticulture, Mendel University in Brno, Valtická 337, 691 44 Lednice, Czech Republic)

  • Patrik Burg

    (Department of Horticultural Machinery, Faculty of Horticulture, Mendel University in Brno, Valtická 337, 691 44 Lednice, Czech Republic)

  • Jiří Souček

    (Research Institute of Agriculture Engineering, p. r. i., 161 01 Prague, Czech Republic)

  • Vlastimil Slaný

    (Department of Agricultural, Food and Environmental Engineering, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1665/1, 613 00 Brno, Czech Republic)

  • Lukáš Vaštík

    (Department of Horticultural Machinery, Faculty of Horticulture, Mendel University in Brno, Valtická 337, 691 44 Lednice, Czech Republic)

Abstract

Due to ongoing changes in the European energy market, there is currently a need to find new and additional uses for waste materials. Horticultural waste, which has not yet been fully recognized, offers a relatively wide potential in this area. Although the properties of these wastes are not ideal for combustion, they can be used as a solid biofuel. The pellets that are produced, however, may have useful properties, either energetic or environmental, and are valuable when utilized in boilers. In this study, six examples of typical input raw materials were selected, analysed, and subsequently pelletized. The experimental results provided an overview of the physio-chemical properties of the evaluated samples. Specifically, the moisture content (9.2–27.8%), bulk density (131.4–242.8 kg·m −3 wt), ash content (3.0–28.0%), lower calorific value (11.3–16.2 MJ·kg −1 ), and major and minor elements, were evaluated. The pelletization process and resultant pellet characteristics, such as durability (96.3–98.8%), moisture content (7.5–11.5%), and dimensions, were also evaluated. In the statistical evaluation, significant differences were found between individual samples. In particular, both the branches and the mixture of perennial plants met the industry standard limits, showing that they are of sufficient quality. On the contrary, the sample of fallen leaves was particularly problematic with regard to a number of parameters (moisture, ash content, and calorific value). The overview of the analyses performed expands the current state of knowledge on the potential to use selected types of horticultural waste in the field of energy and for the production of shaped biofuels.

Suggested Citation

  • Vladimír Mašán & Patrik Burg & Jiří Souček & Vlastimil Slaný & Lukáš Vaštík, 2023. "Energy Potential of Urban Green Waste and the Possibility of Its Pelletization," Sustainability, MDPI, vol. 15(23), pages 1-13, December.
  • Handle: RePEc:gam:jsusta:v:15:y:2023:i:23:p:16489-:d:1292627
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    References listed on IDEAS

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    1. García-Maraver, A. & Popov, V. & Zamorano, M., 2011. "A review of European standards for pellet quality," Renewable Energy, Elsevier, vol. 36(12), pages 3537-3540.
    2. Robert Bailis & Rudi Drigo & Adrian Ghilardi & Omar Masera, 2015. "The carbon footprint of traditional woodfuels," Nature Climate Change, Nature, vol. 5(3), pages 266-272, March.
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