Yeast assisted algal flocculation for enhancing nutraceutical potential of Chlorella pyrenoidosa. (November 2021)

• Record Type: Journal Article
• Authors: Mathur, Megha; Kumar, Ankur; Ariyadasa, Thilini U.; Malik, Anushree
• Is Part Of: Bioresource technology. Volume 340(2021)
• Publication Date: 2021-11
• Subjects: Yeast -- Microalgae -- Flocculation -- Amino acids -- PUFA; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125670
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Yeast assisted flocculation of microalgae for potential food applications. More than 58% flocculation efficiency observed within 2 h. Algae-yeast flocs had higher protein content (35.52%) than algae and yeast biomass. High amino acids content (E/NE-0.68) and omega fatty acids in algae-yeast flocs. Abstract: The present research describes yeast assisted algal flocculation followed by evaluation of algae-yeast flocs for nutritional profile as potent food product. Co-flocculation of Chlorella pyrenoidosa using Saccharomyces cerevisiae showed 58.33 ± 2.37% flocculation efficiency . Nutrient composition of algae-yeast flocs (CP-Y) depicted higher protein content (35.52%) as compared to algae (23.72%) and yeast biomass (33.89). Amino acid profiles of CP-Y biomass depicted increase in essential amino acid content with higher ratio of essential to non-essential amino acid (0.68) as compared to Y (0.57) and CP (0.57) biomass. Lipid and carbohydrate content of CP-Y flocs was estimated as 26.95 ± 0.57% and 21.12 ± 0.83%, respectively. Fatty Acid Methyl Esters (FAME) analysis showed presence of omega rich polyunsaturated fatty acids (PUFAs) like α-linolenic acid (ω-3), Linoleic acid (ω-6), Palmitoleic acid (ω-7) etc in CP-Y biomass. The study provides novel insights on nutrition enriched biomass obtained after algal-yeast flocculation, which can be a better alternative to existing flocculation methods for food applications.