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Analysis of the Effectiveness of Green Waste Composting under Hyperbaric Conditions

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  • Jerzy Bieniek

    (Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland)

  • Błażej Gaze

    (Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland)

  • Bernard Knutel

    (Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland)

  • Krzysztof Rać

    (Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland)

  • Sara Góraj

    (Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, 50-363 Wroclaw, Poland)

Abstract

Increasing global population growth has a significant impact on waste production. The European Union (EU) focuses on waste recycling, biological treatment, and reuse. In the case of biodegradable waste, a significant problem is the long process of material decomposition so that the product meets the requirements of national regulations and EU directives. The search for a way to accelerate this process is still ongoing. This study presents the composting process of green waste under hyperbaric conditions. Eight experiments, four with air exchange frequency t AE = 4 h and four experiments with t AE = 8 h were established. The experiments were conducted in four variants: 0 (atmospheric pressure) and overpressures 50, 100, and 200 kPa. They were carried out on the same input material characterized by the initial moisture content of 60% and a mass of 2000 g. During the composting of green waste, all parameters of the obtained product (moisture content, pH, loss on ignition (LOI), C:N ratio, nutrient content (P, K), and the respiratory activity of microorganisms (AT 4 )) were also evaluated. The most significant weight loss of the composted material was observed in the variant of an overpressure of 200 kPa (t AE = 4 h). The compost weight in relation to the original material decreased by 23.7%. The highest organic matter removal efficiency was obtained for the overpressure variants of 50 and 100 kPa (t AE = 4 h).

Suggested Citation

  • Jerzy Bieniek & Błażej Gaze & Bernard Knutel & Krzysztof Rać & Sara Góraj, 2022. "Analysis of the Effectiveness of Green Waste Composting under Hyperbaric Conditions," Sustainability, MDPI, vol. 14(9), pages 1-17, April.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:9:p:5108-:d:800687
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    References listed on IDEAS

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    1. Konstantia-Ekaterini Lasaridi & Thrassyvoulos Manios & Stamatis Stamatiadis & Christina Chroni & Adamantini Kyriacou, 2018. "The Evaluation of Hazards to Man and the Environment during the Composting of Sewage Sludge," Sustainability, MDPI, vol. 10(8), pages 1-13, July.
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