20.500.12556/DKUM-91596 Sustainable hydrothermal co-carbonization of residues from the vegetable oil industry and sewage sludge hydrochar production and liquid fraction valorisation In this study, the hydrothermal co-carbonization (co-HTC) of residues from the vegetable oil industry (pumpkin oil cake– PC, hemp oil cake– HC) and sewage sludge (SS) was investigated for the first time. The co-HTC was performed at 250 C and atreatment time of 5 h. The effects of the mass ratio of the feedstocks (1:1, 1:3 and 3:1) on the properties of the HTC products were investigated using various analytical methods (NMR, XRD, 3D-EEM, FTIR, etc.). The co-HTC of SS with oil cakes resulted in improved fuel properties of the hydrochar and an increase in C content from 36.9 to 53.7 wt%, and an increase in the higher heating value (HHV) from 14.8 to 23.6 MJ/kg. The combination with HC gave hydrochars with a higher HHV and higher C content than the combination with PC. The hydrochar yield varied in the range of 39.4–55.3 wt%. NMR analysis revealed a higher proportion of aliphatic (~60 %) than aromatic compounds (~35 %) in the hydrochars, as well as a high content of orthophosphate and unsaturated fatty acids. The liquid fractions were rich in nutrients and organic compounds, but toxic to aquatic organisms. The hydrochars and liquid fractions performed well in the germination test with plant species. hydrothermal co-carbonization sewage sludge vegetable oil industry residues hydrochar liquid fraction valorisation hidrotermalna ko-karbonizacija industrija olja blato iz čistilnih naprav ogljikovodikovo oglje true false true Elsevier Angleški jezik Slovenski jezik https://www.sciencedirect.com/journal/energy © 2024 The Authors Članek v reviji 2025-01-17 13:12:40 2025-01-17 13:12:40 2026-01-29 14:10:37 0000-00-00 00:00:00 2024 0 0 14 str. Vol. 307 Aug. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-02-28 2024-08-05 2024-08-06 620.92/.98 204425731 10.1016/j.energy.2024.132760 1873-6785 1-s2.0-S0360544224025349-main.pdf 1-s2.0-S0360544224025349-main.pdf 1 2F72CE781991081B9EE0BBC71A0093CD 5c40b0a622afdecd2c475f88583ecf6f83d841df1764146d48d4d8b3f88c8e74 bf78deef-d4cc-11ef-8b55-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=187936 https://www.sciencedirect.com/science/article/pii/S0360544224025349?via%3Dihub 0 e6e47101-fd13-11f0-a012-00155d00018d https://dk.um.si/Dokument.php?lang=slv&id=202784 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0