“Cultivation of Microalgae Chlorella vulgaris in Airlift photobioreactor for Biomass Production using commercial NPK Nutrients”, alkej, vol. 12, no. 1, pp. 90–99, Dec. 2017, Accessed: Apr. 30, 2025. [Online]. Available: https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/287