Effect of seaweed-based liquid extracts on biomass production and lipid accumulation in Nannochloropsis oculata and Dunaliella salina

Seaweed liquid fertilizers (SLFs) contain macronutrients, micronutrients and trace nutrients essential for microalgal growth. The study aims to evaluate the efficiency of SLFs on biomass production, biochemical physiological processes; was carried out at different SLF concentrations selected seaweeds i.e. Kappaphycus alvarezii, Gelidiella acerosa Turbinaria ornata. comparative analysis growth performance two unicellular green alga three organic media suggest that fertilizer from red seaweed highly efficient than prepared brown seaweed. rate N. oculata D. salina in K. alvarezii as culture resulted 1.25 1.21 times higher control whereas G. it 1.17 1.1 control, respectively. In contrast, T. ornata treated groups, 0.59 0.68 lower maximum concentration values recorded were 0.474, 0.422, 0.194 g/L productivity obtained 0.034, 0.030, 0.014 g/L/d, grown 0.534, 0.497, 0.305 production 0.038, 0.035, 0.021 also suggests pigments, protein, carbohydrate lipid contents significantly control. Given performance, response algae SLFs, best yield 10%, 8%, 1%, However, 6%, 2%, Overall, findings more enhancing pigment, signifying their potential application an alternative commercial media.