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Article

Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass

1
Department of Resource Recirculation Research, National Institute of Environmental Research, Seo-gu, Incheon 22689, Korea
2
School of Environmental Engineering, University of Seoul, Dongdaemun-gu, Seoul 02504, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Dibyendu Sarkar, Rupali Datta, Prafulla Kumar Sahoo, Mohammad Mahmudur Rahman and Jaroslaw Krzywanski
Energies 2022, 15(13), 4903; https://doi.org/10.3390/en15134903
Received: 22 April 2022 / Revised: 17 June 2022 / Accepted: 29 June 2022 / Published: 4 July 2022
(This article belongs to the Topic Sustainable Environmental Technologies)
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. View Full-Text
Keywords: hydrothermal carbonization; hydrochar; recirculation; bioliquid; wood waste hydrothermal carbonization; hydrochar; recirculation; bioliquid; wood waste
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MDPI and ACS Style

Lee, S.-J.; Oh, M.-A.; Oh, S.-J.; Cho, N.-H.; Kang, Y.-Y.; Lee, J.-Y. Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass. Energies 2022, 15, 4903. https://doi.org/10.3390/en15134903

AMA Style

Lee S-J, Oh M-A, Oh S-J, Cho N-H, Kang Y-Y, Lee J-Y. Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass. Energies. 2022; 15(13):4903. https://doi.org/10.3390/en15134903

Chicago/Turabian Style

Lee, Sun-Ju, Min-Ah Oh, Seung-Jin Oh, Na-Hyeon Cho, Young-Yeul Kang, and Jai-Young Lee. 2022. "Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass" Energies 15, no. 13: 4903. https://doi.org/10.3390/en15134903

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