Table 1.

Kinetic parameters of bacteria potentially involved in nitrogen removal from urine^a

Bacterial group	Growth rate (day−1)	Yield (g COD mol−1 e−)	O2 half-saturation constant (Monod kinetics) (mg liter−1)	Concn for 50% HNO2 inhibition (mg liter−1)	NH3 concn (mg liter−1)
AMXb	0.065	0.40	0.04d	100e	770g
AOBc	0.77	0.34	0.3	0.21f	540
NOBc	1.08	0.29	1.1	0.26	—h
AHB (aerobic)c	7.1	3.4	0.08	NDi	ND
DNB (nitrate reduction)c	2.6	3.2		ND	ND
DNB (nitrite reduction)c	1.5	3.2		ND	ND

^aThese are typical parameters from a wide range of literature values.

^bStrous et al., 32°C (35).

^cWiesmann, 20°C, assuming 1 g COD/g organic dry matter (45).

^dComplete inhibition at 0.04 mg liter⁻¹. Strous et al. (36).

^eInhibition at NO₂⁻ concentration of >100 mg liter⁻¹.

^fLochtman (1995) in Hellinga et al. (20).

^gDapena-Mora et al. (9).

^hStüven et al. (38). In mixed systems, NH₂OH (ammonium oxidation intermediate) rather than NH₃ inhibits NOB.

ⁱND, not determined.