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Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass

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  • Sun-Ju Lee

    (Department of Resource Recirculation Research, National Institute of Environmental Research, Seo-gu, Incheon 22689, Korea
    School of Environmental Engineering, University of Seoul, Dongdaemun-gu, Seoul 02504, Korea)

  • Min-Ah Oh

    (School of Environmental Engineering, University of Seoul, Dongdaemun-gu, Seoul 02504, Korea)

  • Seung-Jin Oh

    (School of Environmental Engineering, University of Seoul, Dongdaemun-gu, Seoul 02504, Korea)

  • Na-Hyeon Cho

    (Department of Resource Recirculation Research, National Institute of Environmental Research, Seo-gu, Incheon 22689, Korea)

  • Young-Yeul Kang

    (Department of Resource Recirculation Research, National Institute of Environmental Research, Seo-gu, Incheon 22689, Korea)

  • Jai-Young Lee

    (School of Environmental Engineering, University of Seoul, Dongdaemun-gu, Seoul 02504, Korea)

Abstract

The characteristics of bioliquid produced through the hydrothermal carbonization (HTC) of wood wastes and the effects of recirculation on hydrochar production were analyzed. The organic acids and total organic carbon of bioliquid increased with progressive recirculation, whereas intermediate byproducts decreased. Hydrochar production by bioliquid recirculation increased mass yield, carbon content, caloric value, and energy yield of the former, while improving its quality as a solid refuse fuel. We concluded that bioliquid recirculation promoted HTC, as demonstrated by Fourier-transform infrared spectroscopy. Furthermore, contrary to predictions, a relatively constant quantity of bioliquid was generated in each step, indicating that its continuous reuse is feasible. Therefore, bioliquid recirculation can improve hydrochar production while simultaneously mitigating the environmental impact of wastewater generation. This method should be considered an important strategy toward the implementation of carbon-neutrality goals.

Suggested Citation

  • Sun-Ju Lee & Min-Ah Oh & Seung-Jin Oh & Na-Hyeon Cho & Young-Yeul Kang & Jai-Young Lee, 2022. "Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass," Energies, MDPI, vol. 15(13), pages 1-10, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4903-:d:855755
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    References listed on IDEAS

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    1. Antonio Picone & Maurizio Volpe & Antonio Messineo, 2021. "Process Water Recirculation during Hydrothermal Carbonization of Waste Biomass: Current Knowledge and Challenges," Energies, MDPI, vol. 14(10), pages 1-14, May.
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