N2O production in a single stage nitritation/anammox MBBR process

12
090925 Intermittent aeration, DO 3.0 (mg/l)
4.5
12
090925 Prolonged unaerated period, DO 3.0 (mg/l)
4.5
10
3.75
10
3.75
N₂O (µmol/l)
8
6
4
3
2.25
1.5
DO (mg/l)
N₂O sensor
(µmol/l)
DO (mg/l)
NO₂-N (mg/l)
8
6
4
3
2.25
1.5
DO (mg/l)
NO₂-N
biosensor
(mg/l)
DO (mg/l)
2
0.75
2
0.75
0
0
0 20 40 60 80
Time (min)
0
0
0 50 100 150 200
Time (min)
Figure C7.
Figure C10.
12
090925 Intermittent aeration, DO 3.0 (mg/l)
4.5
12
090926 Prolonged unaerated period, DO 3.0 (mg/l)
4.5
10
3.75
10
3.75
NO₂-N (mg/l)
8
6
4
2
3
2.25
1.5
0.75
DO (mg/l)
NO₂-N
biosensor
(mg/l)
DO (mg/l)
N₂O (µmol/l)
8
6
4
2
3
2.25
1.5
0.75
DO (mg/l)
N₂O
(µmol/l)
DO
(mg/l)
0
0
0 20 40 60 80
Time (min)
0
0
0 50 100 150 200
Time (min)
Figure C8.
Figure C11.
12
090925 Prolonged unaerated period, DO 3.0 (mg/l)
4.5
12
090926 Prolonged unaerated period, DO 3.0 (mg/l)
10
3.75
10
3.75
N₂O (µmol/l)
8
6
4
2
3
2.25
1.5
0.75
DO (mg/l)
N₂O sensor
(µmol/l)
DO (mg/l)
NO₂-N (mg/l)
8
6
4
2
3
2.25
1.5
0.75
DO (mg/l)
NO₂-N (mg/l)
DO (mg/l)
0
0
0 50 100 150 200
Time (min)
0
0
0 50 100 150 200
Time (min)
Figure C9.
Figure C12.
72