Basic HTML Version
MERC ER02-10
19
Disinfection By-Products (
µg/l)
Control Treated
BW
Treated RDL/MRL
T0
T0
T0
TF
Trihalomethanes
0
241.4
0
89.6
0.5
Trichloromethane
< 0.5
< 0.5
< 0.5
< 0.5
0.5
Bromodichloromethane
< 0.5
2.6
< 0.5
3.3
0.5
Dibromochloromethane
< 0.5
119.8
< 0.5
24.5
0.5
Tribromomethane
< 0.5
119
< 0.5
61.8
0.5
Haloacetic Acids
0
143.8
0
95.6
1.0
Monochloroacetic acid
< 2.0
< 2.0
< 2.0
< 2.0
2.0
Dichloroacetic acid
< 1.0
< 1.0
< 1.0
< 1.0
1.0
Trichloroacetic acid
< 1.0
< 1.0
< 1.0
< 1.0
1.0
Bromochloroacetic acid
< 1.0
3.5
< 1.0
< 1.0
1.0
Monobromoacetic acid
< 1.0
3.2
< 1.0
< 1.0
1.0
Dibromoacetic acid
< 1.0
37.1
< 1.0
8.9
1.0
Tribromoacetic acid
< 4.0
100
< 4.0
86.7
1.0
Other
Sodium chlorate
< 10
295/240
< 10
< 10/297
10
Sodium bromate < 50.0
< 50.0
< 50.0
< 50.0
50.0
Monochloroacetonitrile
<0.5
<0.5
<0.5
<0.5
Dichloroacetonitrile
<0.5
<0.5
<0.5
<0.5
0.5
Monobromoacetonitrile
<0.5
<0.5
<0.5
<0.5
Dibromoacetonitrile
<0.5
24
<0.5
8.5
0.5
BW = backwash
RDL = reporting detection limit
MRL = method reporting limit
6.6. Twenty four-hour Dechlorination Trial: 9-10 June 2010
Presented as means and standard deviations.
Physical Parameters
TSS
mg/l
DOC
mg/l
POC
mg/l
T0 Ambient
33.4 (9.6)
3.11 (0.12)
2.06 (0.09)
T0 Enhanced
NA
NA
NA
Enhanced data is the average of 3 time points (2 reps per time point) during the fill time of the ballast tanks.
Ambient water is sampled at the beginning of the trial and before the water is enhanced.
Temp
o
C
Salinity
psu
Dis. Oxygen
mg/l
Turbidity
NTU
pH
T-0 Control
21.03 (0.08)
8.39 (0.02)
6.38 (0.22)
3.22 (0.12)
7.5 (0.1)
T-0 Treated
21.15 (0.04)
9.01 (0.01)
7.35 (0.02)
7.53 (0.20)
7.0 (0.1)
T-F Control
20.51 (0.04)
8.41 (0.00)
5.76 (0.03)
2.96 (0.14)
7.0 (0.1)
T-F Treated
20.74 (0.03)
9.04 (0.00)
7.32 (0.01)
7.29 (0.10)
7.0 (0.1)