Abstract
Spirulina platensis is a biomass related to cyanobacteria, cultivated in worldwide due to high major advantage to human, such as dietary supplement or whole food, feed additive in the aquaculture, aquarium, and poultry, and it has immunomodulation, antioxidant, anti-microbial properties. So the world searches to enhancement the S. platensis biomass. Mixotrophic cultivation of S. platensis gives a very promising alternative for producing a high yield. In this work determined the effects of different types of sugars (glucose, sucrose, lactose, fructose, mannose and starch) with different concentrations 1,2 and 3 gm / liter media under continuous illuminations on the S. platensis growth and different type of pigments concentration. Results revealed that after 21 days of cultivations 1 gm sucrose 2, 3gm glucose and 1 gm fructose induced high yields of biomass in comparison to other types and concentrations of sugars. No significant increase in chlorophyll and carotenoids contents with addition of different types and concentrations of sugars, meanwhile different types and concentrations of sugars have different effects phycobilins concentrations. Biomass of S. platensis yield was enhanced by different types of sugar with possible used low cost sugar supplement.