Conversion of Slaughterhouse Wastes to Solid Fuel Using Hydrothermal Carbonization

Jongkeun Lee, Sungwan Cho, Daegi Kim, JunHee Ryu, Kwanyong Lee, Haegeun Chung and Ki Young Park
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Jongkeun Lee: Department of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea
Sungwan Cho: Department of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea
Daegi Kim: Department of Environmental Engineering, College of Engineering, Daegu University, Gyeongsan 38453, Gyeongsangbuk-do, Korea
JunHee Ryu: Department of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea
Kwanyong Lee: Department of Environment and Public Health, College of Health Science, Jangan University, Gyeonggi 18331, Gyeonggi-do, Korea
Haegeun Chung: Department of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea
Ki Young Park: Department of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul 05029, Korea

Energies, 2021, vol. 14, issue 6, 1-10

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.

Keywords: hydrochar; hydrothermal carbonization; slaughterhouse waste; solid fuel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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