Abstract
The present work reports a case study for the industrialization of a biorefinery aimed at valorizing fish processing residues in order to obtain ω-3 concentrates for the nutraceutical sector. The biorefinery includes a series of processes: oil extraction from fish waste, fish oil transesterification with ethanol, ω-3 concentration based on supercritical CO2 fractionation. The biorefinery is at first designed and then modeled by Aspen Plus™: this allows for a comprehensive picture (mass and energy flows, processing costs and costs for investment) of the overall process. In accordance with the zero-waste concept, all the biorefinery by-products are valorized: fish proteins as fishmeal, and glycerol, saturated fatty acids and short chain unsaturated fatty acids as liquid biofuel. In addition, fish oil transesterification with ethanol is also experimentally tested in different operational conditions in order to maximize fish oil conversion to fatty acid ethyl esters. A trout processing company located in Trentino Province, Italy, represents the case study. The company produces 870 t/year of fish waste. Mass balances allow estimating a production of 26.6 t/year of ω-3 rich oil (income: 1.3 M€), 160 t/year of fish proteins (income: 0.27 M€), and 160 t/year of liquid biofuel. The biofuel, fed to a 100 kWel CHP unit, allows to produce 720 MWhe/year and 870 MWhth/year, covering the total electricity consumption of the plant and providing more than 45% of the thermal energy needs. This translates into a reduction in utility costs of about 0.12 M€ and avoids the emission of 416 t/year of CO2. Finally, the total investment costs for the whole biorefinery amount to about 3.34 M€. In conclusion, this study demonstrates that the production of ω-3 rich fish oils in a bio-refinery concept could become a good opportunity for valorizing fish by-products and increasing the competitiveness of the fish processing industry.
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Holub, D.J., Holub, B.J.: Omega-3 fatty acids from fish oils and cardiovascular disease. Mol. Cell. Biochem. 263, 217–225 (2004)
Bhattacharya, A., Sun, D., Rahman, M., Fernandes, G.: Different ratios of eicosapentaenoic and docosahexaenoic omega-3 fatty acids in commercial fish oils differentially alter pro-inflammatory cytokines in peritoneal macrophages from C57BL/6 female mice. J. Nutr. Biochem. 18, 23–30 (2007)
Chantachum, S., Benjakul, S., Sriwirat, N.: Separation and quality of fish oil from precooked and non-precooked tuna heads. Food Chem. 69, 289–294 (2000)
Wu, T.H., Bechtel, P.J.: Salmon by-product storage and oil extraction. Food Chem. 111, 868–871 (2008)
Wu, T.H., Bechtel, P.J.: Quality of crude oil extracted from aging walleye pollock (Theragra chalcogramma) byproducts. J. Am. Oil Chem. Soc. 86, 903–908 (2009)
Zhong, Y., Madhujith, T., Mahfouz, N., Shahidi, F.: Compositional characteristics of muscle and visceral oil from steelhead trout and their oxidative stability. Food Chem. 104, 602–608 (2007)
Fiori, L., Manfrini, M., Castello, D.: Supercritical CO2 fractionation of omega-3 lipids from fish by-products: Plant and process design, modeling, economic feasibility. Food Bioprod. Process. 92, 120–132 (2014)
Rubio-Rodríguez, N., De Diego, S.M., Beltrán, S., Jaime, I., Sanz, M.T., Rovira, J.: Supercritical fluid extraction of fish oil from fish by-products: a comparison with other extraction methods. J. Food Eng. 109, 238–248 (2012)
Fiori, L., Solana, M., Tosi, P., Manfrini, M., Strim, C., Guella, G.: Lipid profiles of oil from trout (Oncorhynchus mykiss) heads, spines and viscera: trout by-products as a possible source of omega-3 lipids? Food Chem. 134, 1088–1095 (2012)
Meher, L.C., Vidya Sagar, D., Naik, S.N.: Technical aspects of biodiesel production by transesterification—a review. Renew. Sustain. Energy Rev. 10, 248–268 (2006)
Meher, L.C., Dharmagadda, V.S.S., Naik, S.N.: Optimization of alkali-catalyzed transesterification of Pongamia pinnata oil for production of biodiesel. Bioresour. Technol. 97, 1392–1397 (2006)
Mendow, G., Querini, C.A.: High performance purification process of methyl and ethyl esters produced by transesterification. Chem. Eng. J. 228, 93–101 (2013)
Anastopoulos, G., Zannikou, Y., Stournas, S., Kalligeros, S.: Transesterification of vegetable oils with ethanol and characterization of the key fuel properties of ethyl esters. Energies 2, 362–376 (2009)
Sánchez, B.S., Benitez, B., Querini, C.A., Mendow, G.: Transesterification of sunflower oil with ethanol using sodium ethoxide as catalyst. Effect of the reaction conditions. Fuel Process. Technol. 131, 29–35 (2015)
Lembke, P.: Production techniques for omega-3-concentrates. In: De Meester, F., Watson, R., Zibadi, S. (eds.) Omega 6/3 Fatty Acids: Functions, Sustainability Strategies and Perspectives, pp. 353–364. Humana press, New York (2013)
Breivik, H., Haraldsson, G.G., Kristinsson, B.: Preparation of highly purified concentrates of eicosapentaenoic acid and docosahexaenoic acid. J. Am. Oil Chem. Soc. 74, 1425–1429 (1997)
Krumbholz, R., Lembke, P., Schirra, N.: Cromatography process for recovering a substance or a group of substances from a mixture. https://www.google.com/patents/US8063235, (2011). Accessed 10 Jul 2016
Riha, V., Brunner, G.: Separation of fish oil ethyl esters with supercritical carbon dioxide. J. Supercrit. Fluids 17, 55–64 (2000)
Gironi, F., Maschietti, M.: Separation of fish oils ethyl esters by means of supercritical carbon dioxide: thermodynamic analysis and process modelling. Chem. Eng. Sci. 61, 5114–5126 (2006)
Perretti, G., Motori, A., Bravi, E., Favati, F., Montanari, L., Fantozzi, P.: Supercritical carbon dioxide fractionation of fish oil fatty acid ethyl esters. J. Supercrit. Fluids 40, 349–353 (2007)
Maschietti, M., Pedacchia, A.: Supercritical carbon dioxide separation of fish oil ethyl esters by means of a continuous countercurrent process with an internal reflux. J. Supercrit. Fluids 86, 76–84 (2014)
Day, P., McNeil, J., Sirovski, F.: (E)mission impossible—powering diesel engines with an underused by-product. http://www.aquafuelresearch.com/uploads/9/7/3/7/973719/emissionimpossible.pdf. Accessed 21 Apr 2016
European Commission: Commission Decision 2007/589/EC of 18 July 2007 establishing guidelines for the monitoring and reporting of greenhouse gas emissions pursuant to Directive 2003/87/EC of the European Parliament and the Council. Off. J. Eur. Union. 229, 1–85 (2007)
Caputo, A., Sarti, C.: Fattori di emissione di CO2 atmosferica e sviluppo delle fonti rinnovabili nel settore elettrico. http://www.isprambiente.gov.it/files/pubblicazioni/rapporti/R_212_15.pdf#page=58. Accessed 10 Jul 2016
Seider, W.D., Seader, J.D., Lewin, D.R.: Cost Accounting and Capital Cost Estimation. In: Product and Process Design Principles: Synthesis, Analysis and Design. pp. 472–562. Wiley, New York (2004)
Matches Engineering: Process Costs. http://www.matche.com. Accessed 10 Apr 2016
AEEG: Prezzi finali dell’energia elettrica per i consumatori industriali nel 2014 UE e area Euro. http://www.autorita.energia.it/it/dati/eepcfr2.htm. Accessed 10 Apr 2016
AEEG: Prezzi finali del gas naturale per i consumatori industriali nel 2014 UE e area Euro. http://www.autorita.energia.it/it/dati/eepcfr2.htm. Accessed 10 Apr 2016
Wilson, R.P., Cowey, C.B., Hcl, N.: Amino acid composition of whole body tissue of rainbow trout and Atlantic salmon. Aquaculture 48, 373–376 (1985)
Zhang, Y., Dubé, M.A., McLean, D.D., Kates, M.: Biodiesel production from waste cooking oil: 1. Process design and technological assessment. Bioresour. Technol. 89, 1–16 (2003)
GEA: Example: Spray drying. http://www.gea.com/global/en/productgroups/centrifuges-separation_equipment/index.jsp. Accessed 10 Apr 2016
Associazione Granaria Milano: Calendario mercati 2016. http://www.granariamilano.org/pagina.php?id_sottomenu=8&id_menu=2. Accessed 10 Apr 2016
Berica Impianti: Cogenerazione/serie Jolly 50150 kW. http://www.bericaimpianti.it/jspbericaimpianti/serie50_datitecnici.html. Accessed 10 Apr 2016
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The authors gratefully acknowledge CARITRO http://www.fondazionecaritro.it/ for financial support.
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Fiori, L., Volpe, M., Lucian, M. et al. From Fish Waste to Omega-3 Concentrates in a Biorefinery Concept. Waste Biomass Valor 8, 2609–2620 (2017). https://doi.org/10.1007/s12649-017-9893-1
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DOI: https://doi.org/10.1007/s12649-017-9893-1