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Combining Different Approaches for Grape Pomace Valorization: Polyphenols Extraction and Composting of the Exhausted Biomass

Author

Listed:
  • Matteo Perra

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy)

  • Alba Cuena-Lombraña

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
    Hortus Botanicus Karalitanus (HBK), University of Cagliari, V.le Sant’Ignazio da Laconi 11, 09123 Cagliari, Italy)

  • Gianluigi Bacchetta

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
    Hortus Botanicus Karalitanus (HBK), University of Cagliari, V.le Sant’Ignazio da Laconi 11, 09123 Cagliari, Italy)

  • Maria Letizia Manca

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy)

  • Maria Manconi

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy)

  • Richard G. Maroun

    (Centre d’Analyses et de Recherche, Unité de Recherche TVA, Laboratoire CTA, Faculté des Sciences, Université Saint-Joseph, B.P. 17-5208 Riad El Solh, Beirut P.O. Box 17-5208, Lebanon)

  • Aldo Muntoni

    (DICAAR—Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Piazza D’Armi 1, 09123 Cagliari, Italy
    National Research Council of Italy, Institute of Environmental Geology and Geoengineering (CNR-IGAG), Via Marengo 2-09123, 09123 Cagliari, Italy)

  • Carlo Ignazio Giovanni Tuberoso

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy)

  • Katarzyna A. Gil

    (Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy)

  • Giorgia De Gioannis

    (DICAAR—Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Piazza D’Armi 1, 09123 Cagliari, Italy
    National Research Council of Italy, Institute of Environmental Geology and Geoengineering (CNR-IGAG), Via Marengo 2-09123, 09123 Cagliari, Italy)

Abstract

Grape pomace represents 60%, by weight, of the solid side-streams of the wine-making process. The quantities produced, seasonality, and the presence of polyphenols pose economic and environmental issues that require proper management approaches based on the principles of sustainability and circular economy. The present work focuses on the combined application of solid–liquid extraction of polyphenols from ground grape pomace using a hydroethanolic mixture and the composting of the exhausted pomace. The obtained results support the possibility of recovering approximately 76.5 g of extract per kg of dry grape pomace (or 1.8 g of total phenols per kg of dry grape pomace). The composting process was not affected by the extraction process. On the contrary, the composting process was enhanced by the pomace particle size reduction, in terms of final biostability and content of humic acids.

Suggested Citation

  • Matteo Perra & Alba Cuena-Lombraña & Gianluigi Bacchetta & Maria Letizia Manca & Maria Manconi & Richard G. Maroun & Aldo Muntoni & Carlo Ignazio Giovanni Tuberoso & Katarzyna A. Gil & Giorgia De Gioa, 2022. "Combining Different Approaches for Grape Pomace Valorization: Polyphenols Extraction and Composting of the Exhausted Biomass," Sustainability, MDPI, vol. 14(17), pages 1-17, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:17:p:10690-:d:899422
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