Energy value of silver fir (Abies alba) and Norway spruce (Picea abies) wood depending on the degree of its decomposition by selected fungal species

Gendek, Arkadiusz; Piętka, Jacek; Aniszewska, Monika; Malaťák, Jan; Velebil, Jan; Tamelová, Barbora; Krilek, Jozef; Moskalik, Tadeusz

doi:10.1016/j.renene.2023.118948

Cited by 3 publications

(1 citation statement)

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“…On the other hand, GCV values showed a significant reduction in the amount of heat that had already been released in the second year of storage. Considering that the caloric value of wood is closely related to its chemical composition, it can be assumed that the activity of fungi and abiotic factors, which most likely contributed to the reduction in the cellulose content, also contributed to a reduction in the caloric value of the residues [81,82]. The results of net calorific value and gross calorific value are presented in Figure 8a and Figure 8b, respectively.…”

Section: Resultsmentioning

confidence: 99%

Changes in the Characteristics of Pine Logging Residue during Storage in Forest Stands

Wieruszewski,

Kawalerczyk,

Stuper-Szablewska

et al. 2024

Energies

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A significant amount of logging residue is produced during roundwood harvesting. Logs are often left in forest sites due to, for example, ecological or logistical aspects. Taking into account the fact that the number of studies focused on changes in the properties of the residue is very low, it was decided to conduct research on the effect of a three-year storage period in forest stands on the chemical properties and energy potential of the wood. The research design allowed for the determination of changes during up to three years of storage. The performed analysis showed a highly negative impact on the characteristics of the material. These adverse effects were probably caused by the activity of microorganisms such as fungi and bacteria, as evidenced by the increased concentrations of ergosterol and low-molecular-weight organic acids. Moreover, it was found that wood stored for three years was characterized by a lower cellulose content; an increased percentage of lignin; a reduced content of sterols (desmosterol, stigmasterol, lanosterol and β-sitosterol) and phenolic acids; and reduced antioxidant activity, as determined with the ABTS+ method. Storing logs also led to a reduction in the energy potential of the residues, as shown by a reduction in net and gross calorific value and an increased ash content.

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Section: Resultsmentioning

confidence: 99%