Transforming Phaeodactylum tricornutum by-product biomass: from industrial residue to high-value protein extracts
[EN] Due to their rapid growth rate and high-value metabolites, microalgae are a good source for extracting products of biological interest, such as polyunsaturated fatty acids, pigments, polysaccharides or proteins. Industrially, the microalgae Phaeodactylum tricornutum is often produced to extract...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/230677 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/230677 |
| Access Level: | acceso abierto |
| Palabra clave: | Microalgae Biorefinery Proteins Residue |
| Sumario: | [EN] Due to their rapid growth rate and high-value metabolites, microalgae are a good source for extracting products of biological interest, such as polyunsaturated fatty acids, pigments, polysaccharides or proteins. Industrially, the microalgae Phaeodactylum tricornutum is often produced to extract dietary essential omega-3 fatty acids, such as eicosapentanoic acid (EPA) or docosahexenoic acid (DHA) by using supercritical CO2 as extraction solvent. This extraction produces a spent biomass by-product which can constitute more than 90 % of the initial algae biomass and contains many other interesting compounds that can be extracted. The by-product residual biomass of P. tricornutum was evaluated for its potential as a protein source. Initial compositional analysis revealed a high protein content. Protein-rich concentrates were extracted via a pH-shift method coupled with ultrasound treatment. The process involved alkaline solubilisation, ultrasonic disruption, and acid precipitation to isolate proteins, which were then purified via dialysis, achieving an extraction yield and protein content up to 26 % and 65.9 % respectively. Functional assessment revealed excellent foaming, emulsifying, and water and oil retention properties. This work underscores the potential of marine biomass residues as sustainable sources of high-quality proteins for food, feed, and cosmetic applications, advancing the circular bioeconomy. |
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