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Assessment of product composition and energy output of sewage sludge gasification by simulation model

Author

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  • Boldyryev, Stanislav
  • Maljković, Danica
  • Kirasić, Edi
  • Krajačić, Goran

Abstract

Processing sewage sludge presents a significant challenge, necessitating concerted efforts to transform this waste into valuable resources such as syngas and biochar, which can be utilized across energy, chemical, agricultural, and other sectors. This paper examines the continuous gasification of sewage sludge in an inert environment. A systematic analysis of various process parameters was conducted to evaluate their impact on overall system performance, with particular emphasis on optimizing syngas yield, enhancing hydrogen content in the syngas, and maximizing energy output. The analyses were performed using a rigorously developed simulation model implemented within the UniSim Design environment based on specific assumptions and conditions. This model enabled a comprehensive investigation of the interrelationships among process variables and their influence on key performance metrics. Based on the insights gained, targeted recommendations were formulated to improve the efficiency and output of the gasification process. Optimal parameters identified for the reference sewage samples include a pyrolysis temperature range of 700–800 °C, a gas shift reactor temperature of 900–1000 °C, a feed water content of 8 % (by mass), and a slag recycle ratio of 0.8 (by mass) resulting to maximum yield of syngas of 46 % (by mass). The simulation model was validated with various sludge samples from the literature, illustrating the diversity of optimal parameters. These recommendations are aimed at enhancing syngas yield, increasing the hydrogen fraction in the syngas, and achieving higher overall energy output, thus contributing to the optimization of the process. The findings of this study provide insights into the factors that affect process performance and lay the groundwork for further advancements in the production and utilization of syngas derived from sewage sludge as a feedstock.

Suggested Citation

  • Boldyryev, Stanislav & Maljković, Danica & Kirasić, Edi & Krajačić, Goran, 2025. "Assessment of product composition and energy output of sewage sludge gasification by simulation model," Energy, Elsevier, vol. 321(C).
    • Handle: RePEc:eee:energy:v:321:y:2025:i:c:s0360544225011181
    DOI: 10.1016/j.energy.2025.135476
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    1. Gil-Lalaguna, N. & Sánchez, J.L. & Murillo, M.B. & Atienza-Martínez, M. & Gea, G., 2014. "Energetic assessment of air-steam gasification of sewage sludge and of the integration of sewage sludge pyrolysis and air-steam gasification of char," Energy, Elsevier, vol. 76(C), pages 652-662.
    2. Usmani, Sameer & Gonzalez Quiroga, Arturo & Vasquez Padilla, Ricardo & Palmer, Graeme & Lake, Maree, 2020. "Simulation model of the characteristics of syngas from hardwood biomass for thermally integrated gasification using unisim design tool," Energy, Elsevier, vol. 211(C).
    3. Tripathy, Prajukta & Jena, Pabitra Kumar & Mishra, Bikash Ranjan, 2024. "Systematic literature review and bibliometric analysis of energy efficiency," Renewable and Sustainable Energy Reviews, Elsevier, vol. 200(C).
    4. Okolie, Jude A. & Nanda, Sonil & Dalai, Ajay K. & Berruti, Franco & Kozinski, Janusz A., 2020. "A review on subcritical and supercritical water gasification of biogenic, polymeric and petroleum wastes to hydrogen-rich synthesis gas," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).
    5. Hu, Dianqi & Ren, Changyifan & Zhang, Shuyuan & Ma, Miaomiao & Chen, Yunan & Chen, Bin & Guo, Liejin, 2024. "Thermodynamic and environmental analysis of integrated supercritical water gasification of sewage sludge for power and hydrogen production," Energy, Elsevier, vol. 299(C).
    6. Folgueras, M.B. & Alonso, M. & Díaz, R.M., 2013. "Influence of sewage sludge treatment on pyrolysis and combustion of dry sludge," Energy, Elsevier, vol. 55(C), pages 426-435.
    7. Kwon, Eilhann E. & Lee, Taewoo & Ok, Yong Sik & Tsang, Daniel C.W. & Park, Chanhyuk & Lee, Jechan, 2018. "Effects of calcium carbonate on pyrolysis of sewage sludge," Energy, Elsevier, vol. 153(C), pages 726-731.
    8. Gabriele Di Giacomo & Pietro Romano, 2022. "Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification," Energies, MDPI, vol. 15(15), pages 1-33, August.
    9. Aleksandra Petrovič & Sabina Vohl & Tjaša Cenčič Predikaka & Robert Bedoić & Marjana Simonič & Irena Ban & Lidija Čuček, 2021. "Pyrolysis of Solid Digestate from Sewage Sludge and Lignocellulosic Biomass: Kinetic and Thermodynamic Analysis, Characterization of Biochar," Sustainability, MDPI, vol. 13(17), pages 1-34, August.
    10. Zheng, Anqing & Li, Luwei & Tippayawong, Nakorn & Huang, Zhen & Zhao, Kun & Wei, Guoqiang & Zhao, Zengli & Li, Haibin, 2020. "Reducing emission of NOx and SOx precursors while enhancing char production from pyrolysis of sewage sludge by torrefaction pretreatment," Energy, Elsevier, vol. 192(C).
    11. Boldyryev, Stanislav & Gil, Tatyana & Krajačić, Goran & Khussanov, Alisher, 2023. "Total site targeting with the simultaneous use of intermediate utilities and power cogeneration at the polymer plant," Energy, Elsevier, vol. 279(C).
    12. Varbanov, Petar Sabev & Wang, Bohong & Ocłoń, Paweł & Radziszewska-Zielina, Elżbieta & Ma, Ting & Klemeš, Jiří Jaromír & Jia, Xuexiu, 2023. "Efficiency measures for energy supply and use aiming for a clean circular economy," Energy, Elsevier, vol. 283(C).
    13. Cheng, Shan & Wang, Shaoshuo & Huang, Jingchun & Tian, Hong & Chen, Lianghui & Qiao, Yu, 2024. "Enhancement of sulfur control by conditioners during sewage sludge pyrolysis: Focusing on screening and in-situ sulfur fixation mechanism based on model compounds," Energy, Elsevier, vol. 312(C).
    14. Tang, Siqi & Zheng, Chunmiao & Yan, Feng & Shao, Ningning & Tang, Yuanyuan & Zhang, Zuotai, 2018. "Product characteristics and kinetics of sewage sludge pyrolysis driven by alkaline earth metals," Energy, Elsevier, vol. 153(C), pages 921-932.
    15. Chen, Renjie & Yuan, Shijie & Wang, Xiankai & Dai, Xiaohu & Guo, Yali & Li, Chong & Wu, Haibin & Dong, Bin, 2023. "Mechanistic insight into the effect of hydrothermal treatment of sewage sludge on subsequent pyrolysis: Evolution of volatile and their interaction with pyrolysis kinetic and products compositions," Energy, Elsevier, vol. 266(C).
    16. Ghavami, Niloufar & Özdenkçi, Karhan & De Blasio, Cataldo, 2024. "Process simulation of co-HTC of sewage sludge and food waste digestates and supercritical water gasification of aqueous effluent integrated with biogas plants," Energy, Elsevier, vol. 291(C).
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