Value-added co-products from biomass of the diatoms Staurosirella pinnata and Phaeodactylum tricornutum

Microalgae bioprospecting indicates diatoms as a promising resource for biotechnology, with multiple extractions, and intermediate valorization protocols able to open new paths in biomedical, food and feed, and bioenergy fields. The biomass of two diatoms, Phaeodactylum tricornutum and Staurosirella...

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Published inAlgal research (Amsterdam) Vol. 47; p. 101830
Main Authors Savio, Saverio, Farrotti, Serena, Paris, Debora, Arnaìz, Esther, Díaz, Israel, Bolado, Silvia, Muñoz, Raul, Rodolfo, Carlo, Congestri, Roberta
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2020
Subjects
Bioactivity
Biomethane
Diatom biomass
Multiple extractions
PUFAs
Bioactivity
Biomethane
PUFAs
Diatom biomass
Multiple extractions
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Summary:Microalgae bioprospecting indicates diatoms as a promising resource for biotechnology, with multiple extractions, and intermediate valorization protocols able to open new paths in biomedical, food and feed, and bioenergy fields. The biomass of two diatoms, Phaeodactylum tricornutum and Staurosirella pinnata, was sequentially extracted to obtain crude extracts, cellular lipids, and biomethane by means of compatible protocols. Hydrophilic fractions of crude extracts were characterized for their bioactivity on human melanoma (CHL-1) and keratinocytes (HaCaT) cell lines, with S. pinnata extract showing efficient anti-proliferative and cell death inducing activities only on CHL-1. Total lipids were extracted from residual biomass, and their chromatographic profiles evidenced percental amounts of eicosapentaenoic, hexadecenoic, and octadecanoic acid, exploitable in food and feed sectors. Finally, exhausted biomass was used for biomethane production, with P. tricornutum showing the highest rate. Cascade extraction from diatom biomass prospected potential to optimize the production of algal chemicals and their further biotechnological application. [Display omitted] •Valorisation of diatoms products is a promising strategy for biotechnology•Cascade extraction allowed us isolate multiple valued products•Hydro-soluble fraction showed anti-proliferative properties•Lipid fraction contains fatty acids of interest for biomedical and feed industry•Exhausted biomass was a suitable substrate for biomethane production
ISSN:2211-9264
2211-9264
DOI:10.1016/j.algal.2020.101830