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Characterization of Sewage Sludge and Food Waste-Based Biochar for Co-Firing in a Coal-Fired Power Plant: A Case Study in Korea

Author

Listed:
  • Yoonah Jeong

    (Environmental Resource Research Center, Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea)

  • Ye-Eun Lee

    (Environmental Resource Research Center, Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea)

  • I-Tae Kim

    (Environmental Resource Research Center, Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea)

Abstract

Biomass co-firing in coal-fired power plants has been widely accepted to reduce the environmental burden. In this study, food waste (FW) and sewage sludge (SS), which are the main types of municipal organic waste, were selected as solid refuse fuel (SRF). To compensate for the limitations of FW and SS, a mixture of FW and SS with varying ratios was processed using pyrolysis and desalination. The fuel properties such as the calorific value, chlorine content, alkali and alkaline earth metallic species (AAEMs) content, and heavy metal content were determined. The calorific values of all biochars were greater than 12.6 MJ/kg, which satisfies the national threshold of Bio-SRF in Korea. Chlorine and AAEMs contents exhibited clear trends for the FW ratio and pyrolysis temperature. Increasing concentrations of heavy metals were observed with increasing SS ratio and pyrolysis temperature. These results provide important insights into the practical application of municipal waste-based biochar in coal-fired plants, as well as the influence of mixing ratio and pyrolysis temperature.

Suggested Citation

  • Yoonah Jeong & Ye-Eun Lee & I-Tae Kim, 2020. "Characterization of Sewage Sludge and Food Waste-Based Biochar for Co-Firing in a Coal-Fired Power Plant: A Case Study in Korea," Sustainability, MDPI, vol. 12(22), pages 1-12, November.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:22:p:9411-:d:443722
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    References listed on IDEAS

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    1. Wu, Dongyin & Wang, Yuhao & Wang, Yang & Li, Sen & Wei, Xiaolin, 2016. "Release of alkali metals during co-firing biomass and coal," Renewable Energy, Elsevier, vol. 96(PA), pages 91-97.
    2. Ye-Eun Lee & Dong-Chul Shin & Yoonah Jeong & I-Tae Kim & Yeong-Seok Yoo, 2019. "Effects of Pyrolysis Temperature and Retention Time on Fuel Characteristics of Food Waste Feedstuff and Compost for Co-Firing in Coal Power Plants," Energies, MDPI, vol. 12(23), pages 1-14, November.
    3. Ye-Eun Lee & Jun-Ho Jo & I-Tae Kim & Yeong-Seok Yoo, 2017. "Chemical Characteristics and NaCl Component Behavior of Biochar Derived from the Salty Food Waste by Water Flushing," Energies, MDPI, vol. 10(10), pages 1-15, October.
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