Large-scale production of cyanobacterial biomass is
essentially a complex process involving a large number of
variables and for their successful growth, the environment
needs to be conditioned to meet as many of the essential
requirements of the organism. Among the several constraints
to the multiplication of cyanobacteria—physical,
physiological and economic limitations are of major
importance [15,16]. In tropical countries, especially developing
countries such as India, emphasis is placed more on
the production costs [17]. Therefore, the present investigation
was aimed towards the formulation of a cheaper
medium for the growth of cyanobacterium Spirulina (a rich
source of proteins), by stepwise substitution of essential
nutrients (of Zarrouk’s medium) using locally available
agricultural fertilizers, such as SSP and MOP.