Table 7.

Equations used for determination of the EDCF and description of terms with respective units

Equation	Nomenclature
$k=\left(\frac{\pi }{4}\right)\left(\frac{W}{D}\right)$	k: impeller geometrical factor W: impeller blade height (m) D: impeller diameter (m) P: power input (W) P0: ungassed power number of the impeller ρ: broth density (kg m−3) 1/tc: circulation frequency (s−1) Fl: impeller flow number N: stirring speed (s−1) VL: working volume (m3)
$P=P_o\rho N^3{D}^5$
$\frac{1}{t_c}=\frac{(FlN{D}^3)}{v_l}$
$EDCF=\left(\frac{P}{k{D}_3}\right)\left(\frac{1}{t_c}\right)$