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Integration of thermal plasma with CCUS to valorize sewage sludge

Author

Listed:
  • Sikarwar, Vineet Singh
  • Mašláni, Alan
  • Van Oost, Guido
  • Fathi, Jafar
  • Hlína, Michal
  • Mates, Tomáš
  • Pohořelý, Michael
  • Jeremiáš, Michal

Abstract

The presented study addresses the threefold challenges namely, sustainable waste valorization of a difficult waste stream, climate change due to CO2 emissions and clean energy crisis and it is a small step forward to achieve SDG-7. A hybrid DC thermal plasma was employed in a pilot scale facility (∼150 kW) to treat sewage sludge in the presence of waste CO2 (according to the concept of CCUS, Carbon Capture Utilization and Storage) to produce syngas and assess the viability to retrieve phosphorus and other valuable materials from the generated ash. An equilibrium model was also developed to enhance the understanding about the dynamics of process. The H2 generation was around 0.5 m3/kg fuel whereas the amount of char produced was negligible (0–0.013 kg/kg fuel) realizing an efficient transformation of carbon. It was promising to find a high amount of P2O5 in the ash retained in the filter (30 wt %) and reactor (9 wt %) as evaluated by XRF. An average value of 97 % was obtained for CCE (carbon conversion efficiency) depicting almost complete carbon conversion. The results are encouraging to valorize sewage sludge under the CCUS scheme to produce clean energy and reclaim valuable nutrients.

Suggested Citation

  • Sikarwar, Vineet Singh & Mašláni, Alan & Van Oost, Guido & Fathi, Jafar & Hlína, Michal & Mates, Tomáš & Pohořelý, Michael & Jeremiáš, Michal, 2024. "Integration of thermal plasma with CCUS to valorize sewage sludge," Energy, Elsevier, vol. 288(C).
    • Handle: RePEc:eee:energy:v:288:y:2024:i:c:s0360544223032905
    DOI: 10.1016/j.energy.2023.129896
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    References listed on IDEAS

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    1. Manara, P. & Zabaniotou, A., 2012. "Towards sewage sludge based biofuels via thermochemical conversion – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2566-2582.
    2. Vishwajeet & Halina Pawlak-Kruczek & Marcin Baranowski & Michał Czerep & Artur Chorążyczewski & Krystian Krochmalny & Michał Ostrycharczyk & Paweł Ziółkowski & Paweł Madejski & Tadeusz Mączka & Amit A, 2022. "Entrained Flow Plasma Gasification of Sewage Sludge–Proof-of-Concept and Fate of Inorganics," Energies, MDPI, vol. 15(5), pages 1-14, March.
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