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    EXTRAFORWAL – Extraction and Valorization of Valuable Molecules from Tree Bark

    Published on 5 May 2022

    Publication

    This study explores the valorization of tree bark in Wallonia through the extraction of valuable molecules, particularly for the cosmetics, biocontrol, and dietary supplements sectors. Three main tree species are analyzed—oak, Douglas fir, and spruce—by identifying their active compounds and potential applications.

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    The EXTRAFORWAL study is based on an in-depth analysis of tree bark in Wallonia, divided into three main parts and a comprehensive synthesis. Its objective is to valorize these by-products from the wood industry, which are currently underutilized, primarily for biomass or mulching.

    • Part 1: Bark Resources in Wallonia

      • Identification and quantification of available bark volumes for extraction.

      • Analysis of current material flows and valorization opportunities.

    • Part 2: Extraction and Identification of Valuable Molecules

      • Comparison of different extraction methods (water maceration, hydroalcoholic extraction, A-LEEN process).

      • Identification of key active compounds according to bark species:

        • Oak

          : Ellagic acid (antioxidant, cosmetics).

        • Douglas fir

          : Taxifolin (dietary supplements, pharmaceuticals).

        • Spruce

          : Stilbenes and β-pinene (biocontrol, antifungal).

    • Part 3: Biochemical Properties and Extract Valorization

      • Cosmetics

        : Oak and Douglas fir extracts exhibit strong antioxidant and anti-aging properties.

      • Biocontrol

        : Notable antifungal effects against mildew and other agricultural pathogens, with significant potential for sustainable farming.

      • Insecticide

        : Hydroalcoholic oak extract reduces red mite fertility.

      • Herbicide

        : No significant effect, ensuring the extracts’ safety for plants.

    The study highlights the potential for industrial-scale extraction, emphasizing profitability and identifying the best economic opportunities.

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