| dc.description.abstract | Water is an essential component of life, so living things cannot survive without it. One chemical that can cause a decline in water quality is phosphate. Liquid waste containing high concentrations of phosphate, if discharged directly into water bodies, can cause eutrophication. One technology for reducing phosphate concentrations is the use of Chlorella sp. This study aims to analyze the cell density of Chlorella sp produced during the cultivation process, analyze the reduction in phosphate levels in liquid waste, and analyze the phosphate concentration levels in Chlorella sp microalgae. The research method used was laboratory-scale experimentation with stages of Chlorella sp. propagation, Chlorella sp. acclimatization, and Chlorella sp. cultivation. Cultivation was carried out for 15 days, and phosphate levels in liquid waste and Chlorella sp. were calculated at 0, 3, 6, 9, 12, and 15 with 3 repetitions using a batch system. The results showed an increase in Chlorella sp cell density during the cultivation stage, from 27 x 10^4 cells/mL at the beginning to 161 x 10^4 cells/mL at the end of cultivation. The phosphate concentration in the liquid waste decreased by 39.22% from an initial concentration of 12.18 mg/L. Phosphate in Chlorella sp increased from 0.71% to 1.11%. This indicates that there was an accumulation of phosphate in Chlorella sp. | en_US |
