OPTIMIZATION OF BIOMASS PRODUCTION OF Spirulina platensis IN SEAWATER MEDIUM

Spirulina platensis is one of the most potential sources of natural nutrition. The present study was aimed to optimize the parameters like nitrogen sources, pH, temperature and light intensity for increasing the production of Spirulina platensis biomass (dry weight), protein, lipid and chlorophyll-a in seawater medium. The production of Spirulina platensis was optimized in terms of biomass and their biochemical constituents. Among the different nitrogen sources, sodium nitrate recorded higher biomass (0.380 mg ml -1 ), protein (0.221 mg ml -1 ), lipid (36.02 μg ml -1 ) and chlorophyll-a (34.28 μg ml -1 ) in Spirulina platensis (SP2). The dry weight of Spirulina platensis (SP2) (0.318, 0.306 mg ml -1 ), protein (0.177, 0.170 mg ml -1 ), lipid (29.08, 26.74 μg ml -1 ) and chlorophyll-a (27.45, 25.68 μg ml -1 ) were recorded at pH (9.0) and temperature (35 ̊C), respectively. Spirulina platensis (SP2) showed higher biomass (0.317 mg ml -1 ), protein (0.180 mg ml -1 ), lipid (28.64 μg ml -1 ) and chlorophyll-a (26.60 μg ml -1 ) at 5 Klux light intensity. The results of present investigation revealed the optimized parameters in seawater medium exhibited higher yield of Spirulina platensis (SP2) and used for commercial cultivation at low cost. Article History Received : 03.08.2016 Revised : 10.09.2016 Accepted : 30.09.2016