Table 1 Nutrient composition and cost estimation for BBM growth medium

From: Supplementing wastewater with NPK fertilizer as a cheap source of nutrients in cultivating live food (Chlorella vulgaris)

Components Concentration (mg/L) Price (US $)/L
Di-potassium hydrogen orthophosphate (K2HPO4) 18.75 0.001032
Potassium di-hydrogen orthophosphate (KH2PO4) 43.75 0.00072
Magnesium sulfate MgSO4.7H2O 18.75 0.050565
Sodium nitrate (NaNO3) 62.5 0.003125
Calcium chloride (CaCl2.2H2O) 6.25 0.00089
Sodium chloride (NaCl) 6.25 0.000405
EDTA tetrasodium salt (EDTA-Na4) 5 0.00112
Potassium hydroxide (KOH) 3.1 0.000453
Ferrous sulfate (FeSO4.7H2O) 0. 498 0.07569
Boric acid (H3BO3) 1.142 0.012738
Zinc sulfate (ZnSO4.7H2O) 0. 0353 0.000021
Manganese chloride (MnCl2.4H2O) 0. 0058 0.000004
Cupric sulfate (CuSO4.5H2O) 0.0063 0.000014
Cobaltous nitrate (Co(NO3)2.6H2O) 0.002 0.000002
Sodium molybdate (Na2MoO4.2H2O) 0.0048 0.000006
Total costs   0.14679