Table 2 Productivities of different reactors employed for nitrification and denitrification/during the pretreatment of domestic or industrial wastewater streams.

Activated sludge flocs (Single reactor)

24 μmol N g MLSS^-1 h^-1

6 μmol N g MLSS^-1 h^-1

Sequencing batch

19 mg NH₃ L^-1h^-1

13.5 mg N L^-1h^-1

Chemostat (Continuous)

5.6 μmol NH₃ h^-1 mg protein^-1

5.6 μmol N h^-1 mg protein^-1

Chemostat (Continuous)

2.6 μmol NH₃ h^-1 mg protein^-1

4.1 μmol N h^-1 mg protein^-1

Continuous

250 μmol NH₃ L^-1h^-1

400 μmol N L^-1h^-1