Valorization of South Korean marine biowaste via hydrothermal carbonization: hydrochar synthesis and investigation of adsorption capacity
Kooy, E. (2024). Valorization of South Korean marine biowaste via hydrothermal carbonization: hydrochar synthesis and investigation of adsorption capacity. MSc Thesis. Ghent University, Faculty of Bioscience Engineering: Gent. 89 pp. |  |
| Available in | Author | | Document type: Dissertation
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| Keywords | Environments > Aquatic environment > Marine environment
Fish products
Seafood products
Waste management
Korea, Rep.
Marine/Coastal | | Author keywords | marine biowaste, biorefinery |
| Abstract | This thesis addresses the pressing issue of marine biowaste generated from the consumption of
fish and seafood, which poses significant environmental and socioeconomic challenges. With
global population growth, the generation of such waste is expected to rise, necessitating
responsible management strategies. Therefore, the valorisation potential through hydrothermal
carbonization (HTC) was investigated. HTC on eight fish and crustacean species was performed
at three different temperatures (T = 200, 220, 240°C, t = 5h, w/b = 7). The produced hydrochars
(HC) were characterized through point zero charge (PZC), elemental and proximate analysis and
FTIR. Their adsorption characteristics were evaluated using kinetic and adsorption models and
using one-point adsorption experiments with an anionic (methyl orange, MO) and cationic
(methylene blue, MB) dye. In addition, the influence of ionic strength on the adsorption
performance was evaluated. Crustacean-HC showed higher yields (37-69%) than fish-HC (15-
22%). Furthermore, crustacean-HC showed higher PZC than fish-HC (7.93 versus 6.49). The
adsorption capacity of the HCs (MB: 2.7-10.8 mg/g and MO: 5.9-9.2 mg/g) showed a higher
adsorption of MO for the crustacean-HCs. Difference in ionic strength in adsorption experiments
was concluded to not yield significantly different adsorption results. The difference in yields, PZC
and adsorption results were explained by the differences in feedstock composition, further
emphasizing the importance of elucidating the inherent feedstock characteristics for waste
utilization |
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