Standardization of pH and Light Intensity for the Biomass Production of Spirulina platensis

Abstract

The cyanobacterium Spirulina platensis is an attractive alternative source of the pigment chlorophyll, which is used as a natural color in food, cosmetic, and pharmaceutical products. In the present investigation, the influence of light intensity and pH for Spirulina platensis growth, protein and chl a content were examined. In the present investigation the production of Spirulina platensis was optimized in terms of biomass and metabolites. The dry weight of Spirulina platensis was 0.91g/500ml and protein and Chlorophyll a content were 64.3% and 13.2mg/gm respectively at pH 9. At 5 Klux light intensity the dry weight of Spirulina platensis was 0.85g/500ml while protein content and Chlorophyll a were 64.3% and 9.8mg/gm respectively.