Monoraphidium sp. SVMIICT6 was isolated and mixotrophically cultivated in a flat-panel photobioreactor (8 days) to treat synthetic dairy wastewater. COD, nitrates, and phosphates removal efficiencies were 75%, 85%, and 60% respectively. The nutrient removal supported the growth of microalgae in terms of biomass productivity (50 mg Ld), and accumulation of carbohydrate (228.8 mg g), protein (88.8 mg g), and lipid content (25%). Elemental analysis of microalgal biomass revealed carbon (50.6%) as a major fraction. Quantum yield and electron transport rate (ETR) from PSII to PSI increased with time correlating well with chlorophyll pigments (89.53 mg g). The lipid profile resulted in a major fraction of Heptadecanoic acid (C17:0; 51.5%), followed by Myristoleic acid (C14:1; 24.3%) with potent nutraceutical properties. The isolated strain showed efficient treatment of dairy wastewater yielding biomass for diverse applications.
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