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Energy Potential of Biogas from Sewage Sludge after Thermal Hydrolysis and Digestion

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  • Jakub Mukawa

    (Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland)

  • Tadeusz Pająk

    (Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland)

  • Tadeusz Rzepecki

    (Faculty of Mathematics and Natural Sciences, University of Applied Sciences in Tarnów, Mickiewicza 8, 33-100 Tarnów, Poland)

  • Marian Banaś

    (Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland)

Abstract

This paper presents the energy potential of biogas obtained from the anaerobic digestion (AD) of sewage sludge (SS) preceded by thermal hydrolysis (THP) using Cambi THP ® technology. The presented data are for the Tarnów (Poland) wastewater treatment plant for the year 2020. A detailed energy balance of biogas and its use in the cogeneration process and in the production of heat in the water boiler and the steam boiler is presented. The article contains data on the amount of processed SS and the content of dry matter and dry organic matter at different stages of the technological process. The annual plant operation resulted in the production of 3,276,497 Nm 3 of biogas as a result of processing 8684 tonnes of dry solids (tDS) of municipal SS from the Tarnów wastewater treatment plant (WWTP) and regional WWTPs. The energy potential of the produced biogas was 75,347.06 GJ. The average calorific value of biogas was 23,021 kJ/Nm 3. . The obtained biogas production allowed us to cover the thermal energy demand of the THP 100%. The annual average specific biogas conversion rate during the study period was 0.761 Nm 3 /kg of dry organic matter reduced and the average organic matter content reduction in the sludge was 64.60%.

Suggested Citation

  • Jakub Mukawa & Tadeusz Pająk & Tadeusz Rzepecki & Marian Banaś, 2022. "Energy Potential of Biogas from Sewage Sludge after Thermal Hydrolysis and Digestion," Energies, MDPI, vol. 15(14), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5255-:d:867092
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    References listed on IDEAS

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    1. Aragón-Briceño, C.I. & Ross, A.B. & Camargo-Valero, M.A., 2021. "Mass and energy integration study of hydrothermal carbonization with anaerobic digestion of sewage sludge," Renewable Energy, Elsevier, vol. 167(C), pages 473-483.
    2. Francesco Facchini & Giovanni Mummolo & Micaela Vitti, 2021. "Scenario Analysis for Selecting Sewage Sludge-to-Energy/Matter Recovery Processes," Energies, MDPI, vol. 14(2), pages 1-21, January.
    3. Mónica Vergara-Araya & Verena Hilgenfeldt & Heidrun Steinmetz & Jürgen Wiese, 2022. "Combining Shift to Biogas Production in a Large WWTP in China with Optimisation of Nitrogen Removal," Energies, MDPI, vol. 15(8), pages 1-13, April.
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    1. Alessandro A. Carmona-Martínez & Carmen Bartolomé & Clara A. Jarauta-Córdoba, 2023. "The Role of Biogas and Biomethane as Renewable Gases in the Decarbonization Pathway to Zero Emissions," Energies, MDPI, vol. 16(17), pages 1-3, August.

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