Conversion of slaughterhouse wastes to solid fuel using hydrothermal carbonization

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Abstract

In this study, cattle and pig slaughterhouse wastes (SHWs) were hydrothermally carbonized at 150–300◦ C, and the properties of SHW-derived hydrochar were evaluated for its use as a solid fuel. The results demonstrated that increasing the hydrothermal carbonization (HTC) treatment temperature improved the energy-related properties (i.e., fuel ratio, higher heating value, and coalification degree) of both the cattle and pig SHW-derived hydrochars. However, the improvements of cattle SHW-derived hydrochars were not as dramatic as that of pig SHW-derived hydrochars, due to the lipid-rich components that do not participate in the HTC reaction. In this regard, there was no merit of using HTC treatment on cattle SHW for the production of hydrochar or using the hydrochar as a solid fuel in terms of energy retention efficiency. On the other hand, a mild HTC treatment at approximately 200◦ C was deemed suitable for converting pig SHW to value-added solid fuel. The findings of this study suggest that the conversion of SHWs to hydrochar using HTC can provide an environmentally benign method for waste treatment and energy recovery from abandoned biomass. However, the efficiency of energy recovery varies depending on the chemical composition of the raw feedstock.

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CITATION STYLE

APA

Lee, J., Cho, S., Kim, D., Ryu, J., Lee, K., Chung, H., & Park, K. Y. (2021). Conversion of slaughterhouse wastes to solid fuel using hydrothermal carbonization. Energies, 14(6). https://doi.org/10.3390/en14061768

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