Utilization of lignocellulosic biomass towards the production of omega-3 fatty acids by the heterotrophic marine microalga Crypthecodinium cohnii

Document identifier: oai:DiVA.org:ltu-77907
Access full text here:10.1016/j.biortech.2020.122899
Keyword: Engineering and Technology, Industrial Biotechnology, Bioprocess Technology, Teknik och teknologier, Industriell bioteknik, Bioprocessteknik, Crypthecodinium cohnii, DHA, Lipid accumulation, Lignocellulosic biomass, Oxidative organosolv pretreatment, Biokemisk processteknik, Biochemical Process Engineering
Publication year: 2020
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energySDG 9 Industry, innovation and infrastructureSDG 12 Responsible consumption and production
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

Omega-3 fatty acids have become a commodity of high nutritional and commercial value; intensive fishing and its environmental and social cost has led researchers to seeking alternative more sustainable ways of producing them. Heterotrophic microalgae such as Crypthecodinium cohnii, a marine dinoflagellate, have the ability to utilize various substrates and accumulate high amounts of docosahexaenoic acid (DHA). In this work, a mild oxidative organosolv pretreatment of beechwood pulps was employed that allowed up to 95% of lignin removal in a single stage, thus yielding a cellulose-rich solid fraction. The enzymatic hydrolysates were evaluated for their ability to support the growth and lipid accumulation of C. cohnii in batch and fed-batch cultures; the results verified the successful microalgae growth, while DHA reached up to 43.5% of the cell’s total lipids. The proposed bioprocess demonstrated the utilization of non-edible biomass towards high added value food supplements in a sustainable and efficient manner.

Authors

Anthi Karnaouri

Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens
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Angelina Chalima

Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens
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Konstantinos G. Kalogiannis

Chemical Process and Energy Resources Institute (CPERI), CERTH
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Despoina Varamogianni-Mamatsi

Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens
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Angelos Lappas

Chemical Process and Energy Resources Institute (CPERI), CERTH
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Evangelos Topakas

Luleå tekniska universitet; Kemiteknik; Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens
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