Chlorella ellipsoidea was cultured in three different concentrations viz., 4.8, 7.2 and 9.6 g/I of BLA with added 0.4 g PSP and 0.2 g urea and in BBM (control) with triplicate for a period of three months. Each trial was continued for a period of 14 days in the laboratory. The initeal cell density of C. ellipsoidea was 2.5x105 cells/ml which attained the maximum of 94.86x105 cells/ml in BBM followed by 90.89x105, 83.88x10 and 71.34x105-cells/ml in 7.2, 9.6 and 4.8 g/I concentration of BLA, respectively on 10th day 5 of culture. The initial chlorophyll a content of inoculated C. ellipsoidea was 0.10 mg/I which attained the highest content 4.82 rng/I in BBM followed by 4.69, 4.31 and 3.95 mg/I in 7.2, 9.6* and 4.8 g/I concentration of BLA with added 0.4g PSP and 0.2g urea, respectively on 10th day of culture. During the whole culture period the pH range was 6.86 to 8.02.