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Table 1 Algebraic expression of stoichiometric coefficients for common nitrogen sources

From: Achieving pH control in microalgal cultures through fed-batch addition of stoichiometrically-balanced growth media

Nitrogen source

Stoichiometric coefficients

α

Ψ

δ

λ

N2

1

y 2

x 2

1 + x 4 − z 2

NH4+

1

y

x 2 − 2 y

1 + x 4 − y − z 2

NO3−

1

y

x 2

1 + x 4 + 3 y 2 − z 2

CO(NH2)2

1 − y 2

y 2

x 2 − y

1 + x 4 − 3 y 4 − z 2

  1. The stoichiometric coefficients were determined algebraically from Equation 1 and are given in terms of biomass composition (x, y, z) for various nitrogen sources when extracellular metabolites are not considered.