Effect of carbon dioxide concentration on biomass and abundance of chaetoceros calcitrans microalgae cells

Chaetoceros calcitrans has a big role in providing feed for larvae, especially shrimp larvae in the field of aquaculture and fisheries. That is because C. calcitrans has a high nutrient content, namely 35% protein, 6.9% fat, 6.6% carbohydrate and 28% ash content (6). Besides in the field of aquaculture and fisheries. C. calcitrans also has a role in humans. C. calcitrans microalgae has high potential as a producer of high economic value chemical compounds such as omega fatty acids. Therefore this study was conducted to determine the biomass and abundance of C.calcitrans microalgae cells in cultivation with the use of carbon dioxide gas. In this study the carbon dioxide concentration injection was used ie 10%, 20%, 30%, and 40%. The highest abundance and biomass of microalgae cells is in the treatment of 10% carbon dioxide concentration,. So for the cultivation of Chaetoceros calcitrans microalga it is recommended to use 10% carbon dioxide injection concentration.