Food enrichment of Chlorella sorokiniana (Shihira & R.W. Krauss)

Chlorella sorokiniana contains valuable metabolites such as proteins, antioxidants, lipids, vitamins and minerals, and is used as a food for animals and medicine. Therefore, in the present study, the effect of some culture factors and conditions on nutrient supplementation of algal levels for aquaculture was investigated. For this purpose, algae were cultured in modified Bold Basal Media (BBM) and 0.5 gram of glucose was added as carbon source. Then, the effect of pH, addition of thiamine pyrophosphate, changes in nitrate and phosphate levels, addition of yeast and lack of glucose, were studied on growth and content of algal metabolites. The highest growth rate, antioxidant content, protein and some algal mineral content were obtained in medium containing twice the nitrate and phosphate with or without thiamine pyrophosphate. Adding yeast increased dry weight and decreased none significantly antioxidants. Adding thiamine pyrophosphate alone and low reduction of acidity did not significantly effect on growth and metabolites of alga. Lack of glucose significantly reduced alga growth.