Protein Production of Dunaliella sp. Cultured in Various Salt Concentrations

Dunaliella sp. is a potential microalga to be developed as a natural feed because it has a high protein content.This microalgae growth is influenced by salinity concentration.Salinity can also affect the biochemical composition of microalgae.This study aimed to determine Dunaliella sp.growth and protein content cultured at various salinity concentrations to select an effective salinity to produce growth and high protein content.The research output is to find the salinity so Dunaliella sp. can grow well with high protein as feed.The research method was experimental, with a completely randomized design consisting of six treatments and three repetitions.The treatments tested were salinity 0, 5, 10, 15, 20, and 25 ppt observed for nine days of culture.The main parameters measured were cell density, biomass, and protein content.Supporting parameters were temperature, pH, and light intensity.The results showed that the effective salinity to increase the cell density of Dunaliella sp. was 15 ppt.The highest peak cell density at 15 ppt salinity is 32.6067 x 103 cells/ml, and the lowest cell density at 25 ppt salinity is 23.2267 x 103 cells/ml.The effective salinity for increasing biomass is 15 ppt, and protein content is 0 ppt.