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Chemical Characteristics and NaCl Component Behavior of Biochar Derived from the Salty Food Waste by Water Flushing

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  • Ye-Eun Lee

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea
    Department of Construction Environment Engineering, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon KS015, Korea)

  • Jun-Ho Jo

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

  • I-Tae Kim

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea)

  • Yeong-Seok Yoo

    (Division of Environment and Plant Engineering, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea
    Department of Construction Environment Engineering, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon KS015, Korea)

Abstract

Biochar is the product of the pyrolysis of organic materials in a reduced state. In recent years, biochar has received attention due to its applicability to organic waste management, thereby leading to active research on biochar. However, there have been few studies using food waste. In particular, the most significant difference between food waste and other organic waste is the high salinity of food waste. Therefore, in this paper, we compare the chemical characteristics of biochar produced using food waste containing low- and high-concentration salt and biochar flushed with water to remove the concentrated salt. In addition, we clarify the salt component behavior of biochar. Peak analysis of XRD confirms that it is difficult to find salt crystals in flushed char since salt remains in the form of crystals when salty food waste is pyrolyzed washed away after water flushing. In addition, the Cl content significantly decreased to 1–2% after flushing, similar to that of Cl content in the standard, non-salted food waste char. On the other hand, a significant amount of Na was found in pyrolyzed char even after flushing resulting from a phenomenon in which salt is dissolved in water while flushing and Na ions are adsorbed. FT-IR analysis showed that salt in waste affects the binding of aromatic carbons to compounds in the pyrolysis process. The NMR spectroscopy demonstrated that the aromatic carbon content, which indicates the stability of biochar, is not influenced by the salt content and increases with increasing pyrolysis temperature.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1555-:d:114462
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    Cited by:

    1. 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.
    2. Ye-Eun Lee & Jun-Ho Jo & I-Tae Kim & Yeong-Seok Yoo, 2018. "Value-Added Performance and Thermal Decomposition Characteristics of Dumped Food Waste Compost by Pyrolysis," Energies, MDPI, vol. 11(5), pages 1-14, April.
    3. Istvan Bacskai & Viktor Madar & Csaba Fogarassy & Laszlo Toth, 2019. "Modeling of Some Operating Parameters Required for the Development of Fixed Bed Small Scale Pyrolysis Plant," Resources, MDPI, vol. 8(2), pages 1-15, April.
    4. Mejdi Jeguirim & Lionel Limousy, 2019. "Biomass Chars: Elaboration, Characterization and Applications II," Energies, MDPI, vol. 12(3), pages 1-6, January.
    5. Ye-Eun Lee & Jun-Ho Jo & I-Tae Kim & Yeong-Seok Yoo, 2018. "Influence of NaCl Concentration on Food-Waste Biochar Structure and Templating Effects," Energies, MDPI, vol. 11(9), pages 1-16, September.

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