Table 1. Operating conditions at each run.

Influent COD
(mg L^-1)

Organic
loading rate
(kg COD m³ d^-1)

Air flow
(L min^-1)

Influent Ammonium-N
(mg L^-1)

Ammonium
loading rate
(g N m³ d^-1)

1

100

0.6

5

5

30

2

200

1.2

10

10

60

3

300

1.8

15

15

90

4

400

2.4

20

20

120