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A Study of Sewage Sludge Co-Combustion with Australian Black Coal and Shiitake Substrate

Author

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  • Guan-Bang Chen

    (Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan)

  • Samuel Chatelier

    (Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan)

  • Hsien-Tsung Lin

    (Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan)

  • Fang-Hsien Wu

    (Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan)

  • Ta-Hui Lin

    (Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan
    Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan)

Abstract

Co-combustion technology can be a gateway to sewage sludge valorization and net CO 2 reduction. In this study, combustion characteristics of sewage sludge, Australian black coal, shiitake substrate, and their blends were analyzed via thermogravimetric analysis (TGA) coupled with Fourier transform infrared spectroscopy. The ignition temperature, burnout temperature, flammability index ( C ), and combustion characteristics index ( S ) of the fuels and their respective blends were estimated. Kinetic parameters were also estimated using the Coats-Redfern method. The results showed that the oxidation of the blends had two distinct stages. Synergistic effects existed for all the blends, with negative ones occurring at temperatures between 300 and 500 °C and positive ones during the char oxidation period. In the first oxidation stage, both C and S indexes increased with sludge addition to the coal. However, they decreased with sludge addition in the final oxidation stage. The catalytic effect of the sludge and the shiitake was pronounced in the final oxidation stage and it resulted in a decrease of activation energy. As for the pollutant emissions, the results showed that NO x and SO 2 emissions decreased for 25 wt.% sludge addition to the coal. For the sludge-shiitake blends, NO x and SO 2 emissions decreased with increasing shiitake addition. The single-pellet combustion results showed that ignition delay time reduced with increasing sludge/coal ratio but increased with increasing sludge/shiitake ratio. The volatile combustion duration decreased with the addition of sludge and total combustion time decreased sharply with increasing sludge ratio.

Suggested Citation

  • Guan-Bang Chen & Samuel Chatelier & Hsien-Tsung Lin & Fang-Hsien Wu & Ta-Hui Lin, 2018. "A Study of Sewage Sludge Co-Combustion with Australian Black Coal and Shiitake Substrate," Energies, MDPI, vol. 11(12), pages 1-25, December.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3436-:d:188910
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    References listed on IDEAS

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    1. Mau, Vivian & Gross, Amit, 2018. "Energy conversion and gas emissions from production and combustion of poultry-litter-derived hydrochar and biochar," Applied Energy, Elsevier, vol. 213(C), pages 510-519.
    2. Lu, Jau-Jang & Chen, Wei-Hsin, 2015. "Investigation on the ignition and burnout temperatures of bamboo and sugarcane bagasse by thermogravimetric analysis," Applied Energy, Elsevier, vol. 160(C), pages 49-57.
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    Cited by:

    1. Garikai T. Marangwanda & Daniel M. Madyira & Patrick G. Ndungu & Chido H. Chihobo, 2021. "Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis," Energies, MDPI, vol. 14(22), pages 1-19, November.
    2. Xuan Liu & Yang Teng & Kai Zhang, 2022. "Migration Behaviors of As, Se and Pb in Ultra-Low-Emission Coal-Fired Units and Effect of Co-Firing Sewage Sludge in CFB Boilers," Energies, MDPI, vol. 15(4), pages 1-19, February.
    3. Lizheng Zhao & Yanfei Du & Yusen Zeng & Zhizhong Kang & Baomin Sun, 2020. "Sulfur Conversion of Mixed Coal and Gangue during Combustion in a CFB Boiler," Energies, MDPI, vol. 13(3), pages 1-19, January.
    4. Timur Valiullin & Ksenia Vershinina & Pavel Strizhak, 2019. "Ignition of Slurry Fuel Droplets with Different Heating Conditions," Energies, MDPI, vol. 12(23), pages 1-18, November.
    5. Andrzej Greinert & Maria Mrówczyńska & Wojciech Szefner, 2019. "The Use of Waste Biomass from the Wood Industry and Municipal Sources for Energy Production," Sustainability, MDPI, vol. 11(11), pages 1-19, May.
    6. Małgorzata Wzorek, 2020. "Evaluating the Potential for Combustion of Biofuels in Grate Furnaces," Energies, MDPI, vol. 13(8), pages 1-15, April.
    7. Laifu Zhao & Qian Du & Jianmin Gao & Shaohua Wu, 2019. "Contribution of Minerals in Different Occurrence Forms to PM 10 Emissions during the Combustion of Pulverized Zhundong Coal," Energies, MDPI, vol. 12(19), pages 1-14, September.
    8. Jumoke Oladejo & Kaiqi Shi & Xiang Luo & Gang Yang & Tao Wu, 2018. "A Review of Sludge-to-Energy Recovery Methods," Energies, MDPI, vol. 12(1), pages 1-38, December.
    9. Ricardo N. Coimbra & Carla Escapa & Marta Otero, 2019. "Comparative Thermogravimetric Assessment on the Combustion of Coal, Microalgae Biomass and Their Blend," Energies, MDPI, vol. 12(15), pages 1-22, August.

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