Phycoremediation potential of Tetradesmus sp. SVMIICT4 in treating dairy wastewater using Flat-Panel photobioreactor. (February 2022)

• Record Type: Journal Article
• Authors: Ravi Kiran, Boda; Venkata Mohan, S.
• Is Part Of: Bioresource technology. Volume 345(2022)
• Publication Date: 2022-02
• Subjects: Phylogeny -- DUAL-Pulse amplitude modulator (DUAL-PAM) -- Mixotrophic -- Carbon fixation -- Transertification; 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.2021.126446
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Tetradesmus sp. SVMIICT4 was isolated and characterised at the molecular level. High removal efficiency of nutrients with enhanced pigmentation and biomass productivity was observed. Lipid productivity with wide-ranging FAME was witnessed. An integrated approach for biosynthesis of value-added products with simultaneous treatment. Abstract: Tetradesmus sp. SVMIICT4 was isolated and cultivated mixotrophically in a flat-panel photobioreactor (FP-PBR) for concurrent dairy wastewater treatment, carbon fixation, and biomass production. Integrated wastewater treatment showed good COD and nutrients removal efficiency accounting for biomass with an accumulation of carbohydrate (21.48 mg g −1 ) and protein (19.52 mg g −1 ). Chlorophyll a fluorescence transients (Fv/Fm, ETo/RC, TRo/RC, and Abs/RC) deduced through OJIP curve fittings, showed consistent improvement in photosynthetic activity throughout the cultivation period. The absorption flux per reaction centre corroborated with increased chlorophyll content (18.94 mg g −1 ), resulting in higher electron transport (ET/Rc) and lower non-photochemical quenching (NPQ). The fatty acid profile showed high content of unsaturated, followed by saturated fatty acids, which has multiple applications in food, feed, and fuel industries, enabling a bio-based economy.