Symbols:

t	Time	[h]
S	Substrate feed rate	[C-mol/h]
r	Conversion rate	[C-mol/h]
q	Specific rate	[g/g/h]
Y	Yield	[C-mol/C-mol]
F	Flow/feed rate	[g/h]/[nL/min]
C	Concentration	[C-mol/l]
X	Total amount of biomass [C-mol]V_m Molar volume of gas at norm condition (0 °C and 1 atm)	[nl/mol]
Ra_inert	Inert gas ratio (see equation 10)	[-]
y_wet	O₂ concentration in off-gas diluted by water content	[-]
ex_H₂O	Off-gas water content	[-]
ρ_feed	Feed density	[g/L]
S₀	Concentration feed	[g/L]
k	Feed exponent	[h-1]