0
20
40
60
80
100
120
0
10
20
30
40
50
Time
Residue
aerobic aquatic
SFO
χ
2
error level
=
20.4%
0
20
40
60
80
100
120
140
-5
0
5
Time
Residual
SFO residuals
0
20
40
60
80
100
120
0
10
20
30
40
50
Time
Residue
aerobic aquatic
IORE
χ
2
error level
=
5.06%
0
20
40
60
80
100
120
140
-2
0
2
Time
Residual
IORE residuals
0
20
40
60
80
100
120
0
10
20
30
40
50
Time
Residue
aerobic aquatic
DFOP
χ
2
error level
=
3.39%
0
20
40
60
80
100
120
140
-3
-2
-1
0
1
2
3
Time
Residual
DFOP residuals