| Title: | Circular blue bioeconomy for shrimp shell waste valorization: environmental impact assessment : magistrsko delo |
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| Authors: | ID Pučnik, Rok (Author)
ID Čuček, Lidija (Mentor) More about this mentor... 
ID Vujanović, Annamaria (Comentor)
ID Vicente, Filipa A. (Comentor) |
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| Files: |  MAG_Pucnik_Rok_2023.pdf (3,10 MB)
MD5: 284106E6B5E68546B7BB5A6958A2991F
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| Language: | English |
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| Work type: | Master's thesis/paper |
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| Typology: | 2.09 - Master's Thesis |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | The seafood processing industry generates substantial amounts of waste, particularly from the shells of crustaceans. These shells currently hold limited to no value within the food sector, and the current methods of disposal can have negative impact on the natural bioecology. However, these shells still contain valuable compounds such as polymers, minerals, and polyphenols, which could be further utilized. Extracting these compounds using a biorefinery approach, which emphasizes sustainability, could be a viable solution.
This master thesis aims to assess the environmental implications, using the Life Cycle Assessment methodology, of a shrimp shell biorefinery process, to produce valuable products, like proteins, chitin, astaxanthin and calcium carbonate. The laboratory-scale biorefinery process was initially upscaled to both pilot and industrial scales, based on equipment design. Also, a comparison between the calculated power demand of units and the power demand of units, derived from Aspen Capital Cost Estimator, was also done. For the laboratory, pilot and industrial sized process, the energy consumption was determined combined with the environmental impact assessment, such as global warming, eutrophication, acidification, ecotoxicity potentials and other. The functional unit was the production of 1 kg of chitin, where the capacity of the laboratory process was linearly scaled up.
The evaluation of energy consumption revealed significant disparities among the different scales. Specifically, the upscaled laboratory process exhibited significantly higher energy consumption per kg of chitin (5,882.1 kWh) in comparison to the pilot (62.3 kWh) and industrial (21.1 kWh) scales. This outcome underscores the inadequacies of employing a linear scale-up in environmental analysis. Notably, centrifugation dominated electrical energy consumption at the laboratory-scale and industrial-scale, while refrigeration took over this role at the pilot-scale process.
Related to impact assessment it was found that both pilot- and industrial-scale processes demonstrated lower overall environmental impacts, compared to the laboratory-scale process in all evaluated categories. Acidification, photochemical oxidation, eutrophication and global warming potential exhibited the most significant variations, with reductions ranging up to 97 %, while ozone layer depletion displayed only a 17 % decrease. Importantly, all three scales also exhibited some positive effects (unburdening the environment) due to the use of shrimp shell materials, with particularly noticeable improvements in the category of terrestrial ecotoxicity. |
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| Keywords: | Shrimp shells, Biorefinery, Process design, Life cycle assessment (LCA), Circular bioeconomy, Process Scale-up |
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| Place of publishing: | Maribor |
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| Place of performance: | Maribor |
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| Publisher: | [R. Pučnik] |
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| Year of publishing: | 2023 |
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| Number of pages: | 1 spletni vir (1 datoteka PDF (XI, 81 f.)) |
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| PID: | 20.500.12556/DKUM-85286 |
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| UDC: | 502.173/.174:66.012(043.2) |
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| COBISS.SI-ID: | 192065539 |
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| Publication date in DKUM: | 04.10.2023 |
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| Views: | 763 |
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| Downloads: | 3 |
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| Metadata: |    |
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| Categories: | KTFMB - FKKT
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