Dairy Wastewaters to Promote Mixotrophic Metabolism in <i>Limnospira</i> (<i>Spirulina</i>) <i>platensis</i>: Effect on Biomass Composition, Phycocyanin Content, and Fatty Acid Methyl Ester Profile

Dairy Wastewaters to Promote Mixotrophic Metabolism in <i>Limnospira</i> (<i>Spirulina</i>) <i>platensis</i>: Effect on Biomass Composition, Phycocyanin Content, and Fatty Acid Methyl Ester Profile

This study explores the mixotrophic cultivation of <i>Limnospira platensis</i> using dairy byproducts, specifically scotta whey (SW), buttermilk wastewater (BMW), and dairy wastewater (DWW), to promote biomass production and enhance the composition of bioactive compounds. By assessing va...

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Bibliographic Details
Main Authors: Luca Baraldi, Luca Usai, Serenella Torre, Giacomo Fais, Mattia Casula, Debora Dessi, Paola Nieri, Alessandro Concas, Giovanni Antonio Lutzu
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Life
Subjects:
cheese whey
buttermilk
dairy wastewater
<i>Limnospira platensis</i>
phycocyanin
FAME profile
Online Access:https://www.mdpi.com/2075-1729/15/2/184
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Summary:This study explores the mixotrophic cultivation of <i>Limnospira platensis</i> using dairy byproducts, specifically scotta whey (SW), buttermilk wastewater (BMW), and dairy wastewater (DWW), to promote biomass production and enhance the composition of bioactive compounds. By assessing various concentrations (1%, 2%, and 4% v v<sup>−1</sup>) of these byproducts in a modified growth medium, this study aims to evaluate their effect on <i>L. platensis</i> growth, phycocyanin (C-PC) content, and fatty acid methyl ester (FAME) profiles. The results show that the optimal biomass production was achieved with 2% scotta and dairy wastewater, reaching maximum concentrations of 3.30 g L<sup>−1</sup> and 3.19 g L<sup>−1</sup>, respectively. Mixotrophic cultivation led to increased C-PC yields, especially in buttermilk and dairy wastewater treatments, highlighting the potential for producing valuable pigments. Additionally, the FAME profiles indicated minimal changes compared to the control, with oleic and γ-linolenic acids being dominant in mixotrophic conditions. These findings support the viability of utilizing dairy byproducts for sustainable <i>L. platensis</i> cultivation, contributing to a circular bioeconomy while producing bioactive compounds of nutritional and commercial interest.
ISSN:2075-1729

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