Table 2.

Productivities of different reactors employed for nitrification and denitrification/during the pretreatment of domestic or industrial wastewater streams.

Reactor Type	Removal rates (Productivities or specific productivities)		Reference
	Nitrification	Denitrification
Activated sludge flocs (Single reactor)	24 μmol N g MLSS-1 h-1	6 μmol N g MLSS-1 h-1	[65]
Sequencing batch	19 mg NH3 L-1h-1	13.5 mg N L-1h-1	[66]
Chemostat (Continuous)	5.6 μmol NH3 h-1 mg protein-1	5.6 μmol N h-1 mg protein-1	[67]
Chemostat (Continuous)	2.6 μmol NH3 h-1 mg protein-1	4.1 μmol N h-1 mg protein-1	[68]
Continuous	250 μmol NH3 L-1h-1	400 μmol N L-1h-1	[69]

MLSS = Mixed liquor suspended solid