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Analysis of the Spatial and Temporal Distribution of Process Gases within Municipal Biowaste Compost

Author

Listed:
  • Sylwia Stegenta

    (Institute of Agricultural Engineering, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, 51-603 Wroclaw, Poland)

  • Karolina Sobieraj

    (Institute of Agricultural Engineering, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, 51-603 Wroclaw, Poland)

  • Grzegorz Pilarski

    (Best-Eko Sp. z o.o. Company, 44-240 Żory, Poland)

  • Jacek A. Koziel

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011-3270, USA)

  • Andrzej Białowiec

    (Institute of Agricultural Engineering, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, 51-603 Wroclaw, Poland)

Abstract

Composting processes reduce the weight and volume of biowaste and produce products that can be used in agriculture (e.g., as fertilizer). Despite the benefits of composting, there are also problems such as odors and the emission of pollutants into the atmosphere. This research aimed to investigate the phenomenon of process gas (CO, CO 2 , NO, O 2 ) evolution within a large-scale municipal composter. The effects of turning frequency and pile location (outdoor vs. indoors) on process gas and temperature spatial and temporal evolution were studied in six piles (37‒81 tons of initial weight) over a six-month period. The biowaste consisted of green waste and municipal sewage sludge. The chemical composition and temperature of process gases within four cross sections with seven sampling locations were analyzed weekly for ~7–8 weeks (a total of 1375 cross sections). The aeration degree, temperature, CO, CO 2, and NO concentration and their spatial and temporal distribution were analyzed. Final weight varied from 66% reduction to 7% weight gain. Only 8.2% of locations developed the desired chimney effect (utilizing natural buoyancy to facilitate passive aeration). Only 31.1% of locations reached thermophilic conditions (necessary to inactivate pathogens). Lower O 2 levels corresponded with elevated CO 2 concentrations. CO production increased in the initial composting phase. Winter piles were characterized by the lowest CO content. The most varied was the NO distribution in all conditions. The O 2 concentration was lowest in the central part of the pile, and aeration conditions were good regardless of the technological regime used. Turning once a week was sufficient overall. Based on the results, the most favorable recommended procedure is turning twice a week for the first two weeks, followed by weekly turning for the next two weeks. After that, turning can be stopped unless additional removal of moisture is needed. In this case, weekly turning should continue until the process is completed. The size of the pile should follow the surface-to-volume ratio: <2.5 and <2 for cooler ambient conditions.

Suggested Citation

  • Sylwia Stegenta & Karolina Sobieraj & Grzegorz Pilarski & Jacek A. Koziel & Andrzej Białowiec, 2019. "Analysis of the Spatial and Temporal Distribution of Process Gases within Municipal Biowaste Compost," Sustainability, MDPI, vol. 11(8), pages 1-23, April.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:8:p:2340-:d:224108
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    Citations

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    Cited by:

    1. Sylwia Stegenta-Dąbrowska & Jakub Rogosz & Przemysław Bukowski & Marcin Dębowski & Peter F. Randerson & Jerzy Bieniek & Andrzej Białowiec, 2020. "The Fluctuation of Process Gasses Especially of Carbon Monoxide during Aerobic Biostabilization of an Organic Fraction of Municipal Solid Waste under Different Technological Regimes," Data, MDPI, vol. 5(2), pages 1-7, April.
    2. Agnieszka Medyńska-Juraszek & Magdalena Bednik & Piotr Chohura, 2020. "Assessing the Influence of Compost and Biochar Amendments on the Mobility and Uptake of Heavy Metals by Green Leafy Vegetables," IJERPH, MDPI, vol. 17(21), pages 1-16, October.
    3. Karolina Sobieraj & Sylwia Stegenta-Dąbrowska & Jacek A. Koziel & Andrzej Białowiec, 2021. "Modeling of CO Accumulation in the Headspace of the Bioreactor during Organic Waste Composting," Energies, MDPI, vol. 14(5), pages 1-17, March.
    4. Sylwia Stegenta-Dąbrowska & Karolina Sobieraj & Jacek A. Koziel & Jerzy Bieniek & Andrzej Białowiec, 2020. "Kinetics of Biotic and Abiotic CO Production during the Initial Phase of Biowaste Composting," Energies, MDPI, vol. 13(20), pages 1-22, October.
    5. Sylwia Stegenta-Dąbrowska & Peter F. Randerson & Sarah R. Christofides & Andrzej Białowiec, 2020. "Carbon Monoxide Formation during Aerobic Biostabilization of the Organic Fraction of Municipal Solid Waste: The Influence of Technical Parameters in a Full-Scale Treatment System," Energies, MDPI, vol. 13(21), pages 1-21, October.

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