Environmental Engineering Reference
In-Depth Information
Chap7.fm Page 96 Wednesday, April 18, 2007 3:27 PM
Table 7-3 Approximate amount of dechlorination chemical needed for 100 mg/L chlorine residual and 100 ft
of pipeline (US units)
Pounds of Chemical Needed
Pipeline
Diameter
in .
Sodium
Thiosulfate
Sodium
Bisulfite
Sodium
Metabisulfite
Sodium
Sulfite
Calcium
Thiosulfate
Ascorbic
Acid
Sodium
Ascorbate
2
0.03
0.02
0.02
0.03
0.02
0.03
0.04
4
0.10
0.09
0.08
0.11
0.07
0.14
0.15
6
0.23
0.20
0.18
0.24
0.15
0.31
0.34
8
0.41
0.35
0.32
0.43
0.27
0.54
0.61
10
0.65
0.55
0.50
0.67
0.41
0.85
0.95
12
0.93
0.79
0.72
0.96
0.60
1.22
1.37
16
1.65
1.40
1.28
1.71
1.06
2.18
2.44
18
2.09
1.77
1.62
2.16
1.34
2.75
3.08
20
2.58
2.19
2.00
2.67
1.66
3.40
3.81
24
3.72
3.15
2.88
3.84
2.39
4.90
5.48
30
5.81
4.93
4.50
6.00
3.73
7.65
8.57
36
8.37
7.09
6.48
8.64
5.38
11.01
12.34
42
11.39
9.65
8.82
11.75
7.32
14.99
16.79
48
14.88
12.61
11.51
15.35
9.56
19.58
21.93
54
18.83
15.96
14.57
19.43
12.09
24.78
27.76
60
23.25
19.70
17.99
23.99
14.93
30.60
34.27
Search WWH ::




Custom Search