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Evaluation of MSW Compost and Digestate Mixtures for a Circular Economy Application

Author

Listed:
  • Isabella Pecorini

    (DESTEC—Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56122 Pisa, Italy)

  • Eleonora Peruzzi

    (Research Institute on Terrestrial Ecosystems (CNR-IRET), National Research Council of Italy, 56124 Pisa, Italy)

  • Elena Albini

    (DIEF—Department of Industrial Engineering, University of Florence, 50139 Florence, Italy)

  • Serena Doni

    (Research Institute on Terrestrial Ecosystems (CNR-IRET), National Research Council of Italy, 56124 Pisa, Italy)

  • Cristina Macci

    (Research Institute on Terrestrial Ecosystems (CNR-IRET), National Research Council of Italy, 56124 Pisa, Italy)

  • Grazia Masciandaro

    (Research Institute on Terrestrial Ecosystems (CNR-IRET), National Research Council of Italy, 56124 Pisa, Italy)

  • Renato Iannelli

    (DESTEC—Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56122 Pisa, Italy)

Abstract

In order to obtain a product with agronomic characteristics and biological stability consistent with the EU fertilizer decree for the market of EU fertilising products three different mixtures obtained from sludge digestate from municipal wastewater treatment plant, fresh compost and mature compost have been studied and characterized. For the experimental activity, the raw samples and three mixing ones were collected for the analytical characterization. The biological stability was then assessed for all samples using different stability criteria such as Specific Oxygen Uptake Rate, Rottegrad self-heating factor, Residual biogas potential. Specific enzymatic tests provided information about the status of nutrient cycles (C, P and S) and to overall microbial activity. Physical (bulk density, particle density, air capacity and water content), nutritional (C, N, P, K, Mg, and Ca) and toxicological properties (seedling growth tests on Lepidum sativum L., Cucumis sativus L., Lolium perenne L.) were also evaluated in order to assess the feasibility of agronomic use of the digestate-based mixtures. All the digestate-based mixtures responded to the main characteristics of compost quality requirements proposed in national and international regulations. The evidence found in this study highlighted that the strategy of mixing of sludge digestates with the composts allowed to mitigate the environmental risk posed by each starting material and to valorize their nutrient content.

Suggested Citation

  • Isabella Pecorini & Eleonora Peruzzi & Elena Albini & Serena Doni & Cristina Macci & Grazia Masciandaro & Renato Iannelli, 2020. "Evaluation of MSW Compost and Digestate Mixtures for a Circular Economy Application," Sustainability, MDPI, vol. 12(7), pages 1-18, April.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:7:p:3042-:d:343786
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    References listed on IDEAS

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    1. Baldi, F. & Pecorini, I. & Iannelli, R., 2019. "Comparison of single-stage and two-stage anaerobic co-digestion of food waste and activated sludge for hydrogen and methane production," Renewable Energy, Elsevier, vol. 143(C), pages 1755-1765.
    2. Elena Albini & Isabella Pecorini & Giovanni Ferrara, 2019. "Improvement of Digestate Stability Using Dark Fermentation and Anaerobic Digestion Processes," Energies, MDPI, vol. 12(18), pages 1-15, September.
    3. Isabella Pecorini & Francesco Baldi & Renato Iannelli, 2019. "Biochemical Hydrogen Potential Tests Using Different Inocula," Sustainability, MDPI, vol. 11(3), pages 1-17, January.
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    Cited by:

    1. Beáta Stehlíková & Katarína Čulková & Marcela Taušová & Ľubomír Štrba & Eva Mihaliková, 2021. "Evaluation of Communal Waste in Slovakia from the View of Chosen Economic Indicators," Energies, MDPI, vol. 14(16), pages 1-22, August.
    2. Nikolaos Tzortzakis & Christos Saridakis & Antonios Chrysargyris, 2020. "Treated Wastewater and Fertigation Applied for Greenhouse Tomato Cultivation Grown in Municipal Solid Waste Compost and Soil Mixtures," Sustainability, MDPI, vol. 12(10), pages 1-21, May.
    3. Elena Rossi & Isabella Pecorini & Giovanni Ferrara & Renato Iannelli, 2022. "Dry Anaerobic Digestion of the Organic Fraction of Municipal Solid Waste: Biogas Production Optimization by Reducing Ammonia Inhibition," Energies, MDPI, vol. 15(15), pages 1-17, July.
    4. Elena Rossi & Isabella Pecorini & Renato Iannelli, 2022. "Multilinear Regression Model for Biogas Production Prediction from Dry Anaerobic Digestion of OFMSW," Sustainability, MDPI, vol. 14(8), pages 1-17, April.
    5. Dorota Kulikowska & Katarzyna Bernat & Magdalena Zaborowska & Magdalena Zielińska, 2022. "Municipal Sewage Sludge Composting in the Two-Stage System: The Role of Different Bulking Agents and Amendments," Energies, MDPI, vol. 15(14), pages 1-14, July.

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