Geothermal water as a nutrient medium source on the biomass productivity and biochemical composition of Spirulina (Arthrospira platensis) under the greenhouse conditions

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Table 2

Biomass yield and biomass economic index of Spirulina cultured in the Schlösser's medium and in the different ratios of geothermal water.

	SM	GW25	GW50	GW75	GW100
Biomass yield (g/L)	1.14 ± 0.14^b	1.29 ± 0.13^b	1.32 ± 0.02^b	1.29 ± 0.01^b	0.62 ± 0.05^a
Medium cost (€/L)	0.0150	0.0114	0.0059	0.0019	0.0005
Biomass economic index (€/kg)	17.10 ± 2.10^c	14.70 ± 1.54^c	7.80 ± 0.14^b	2.40 ± 0.01^a	0.30 ± 0.02^a

The data was analyzed using one-way ANOVA. Different letters in the same line indicate statistically significant differences (P < 0.05) among the experimental groups.

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