Table 2.

Kinetics of ${\text{NH}}_4^{+}$ oxidation with variable CH₄ supply at pH 6.

CH4	Affinity constantc [Ks(app)]		Vmaxd
	${\text{NH}}_4^{+}$ (mM)	NH3 (μM)
0.5a(0.005)b	1.25	4.9	1.61
1 (0.01)	1.50	5.8	1.61
2 (0.02)	6	23.3	1.43
3 (0.03)	9	35.0	1.43
4 (0.04)	30	116.7	1.43
8 (0.08)	70	272.3	1.43

^aCH₄ concentrations in % (v/v).

^bCH₄ concentrations in the liquid in mM.

^cAffinity constants were calculated based on two independent experiments

^dV_max values are in μmol ${\mathrm{NO}}_2^{-}$.h⁻¹.mg protein⁻¹.