N2O production in a single stage nitritation/anammox MBBR process

Appendix C
Microsensor measurements
12
090918 Intermittent aeration, DO 3.0 (mg/l)
4.5
12
090921 Intermittent aeration, 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 20 40 60 80
Time (min)
Figure C1.
Figure C4.
30
090918 Intermittent aeration, DO 3.0 (mg/l)
4.5
12
090922 Intermittent aeration, DO 3.0 (mg/l)
4.5
25
3.75
10
3.75
NO₂-N (mg/l)
20
15
10
5
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 20 40 60 80
Time (min)
Figure C2.
Figure C5.
12
10
090921 Intermittent aeration, DO 3.0 (mg/l)
4.5
3.75
40
090922 Intermittent aeration, DO 3.0 (mg/l)
4
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)
30
20
10
3
2
1
DO (mg/l)
NO₂-N
biosensor
(mg/l)
DO (mg/l)
0
0
0 20 40 60 80
Time (min)
0
0
0 20 40 60 80
Time (min)
Figure C3.
Figure C6.
71