Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production

To achieve strong, successful and commercial aqua-biotechnological microalgae applications, screening, isolation, molecular identification, physiological characterizations are needed. In the current study, a native cyanobacteria strain Arthrospira platensis NIOF17/003 was isolated from surface water of El-Khadra Lake, saline-alkaline lake located in Wadi El-Natrun, Egypt. The cyanobacterium phylogenetically identified by 16S rRNA marker deposited GenBank database (accession number MW396472). late exponential phase A. reached at 8th day growth using Zarrouk medium, with recorded dry weight (DW) 0.845 g L−1. showed 52% protein, 14% carbohydrate, biomass productivity 143.83 mg L−1 day−1, 8.5% lipid, lipid 14.37 day−1. general, values cetane number, iodine value, cold filter plugging point (52.9, 85.5 I2/100 oil, −2.2 °C, respectively) fatty acid methyl esters accordance those suggested international standards. Besides, applying algal-free (FL) as biodiesel byproduct production rotifer (Brachionus plicatilis) revealed that 0.6 FL significantly increased population females carrying eggs, confirming can be used efficiently for B. plicatilis production. study concluded new isolate is promising double sustainable use aquaculture feed.