Biology Reference
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0.010
UCFL-131
UCFL-94
0.001
0.000
0
5
10
15
20
25
30
Distance (m)
Fig 5.4a:
Total sticking efficiencies for E. coli strains UCFL-94 and UCFL-131 as a
function of transport distance
For the segments, Α varied by less than 1 (0.65) log unit and by 2 log units for UCFL-94 and
UCFL-131, respectively; values ranged from 8.22×10
-6
to 4.55×10
-3
for UCFL-94 and 1.55×10
-5
to 7.62×10
-4
from the effluent end to the influent end of the column. At equivalent transport
distances values of Α
L
for the two strains revealed more than 0.5 log unit inter-strain variations
(
Table 5.1
). From the results it can be concluded that very low values of sticking efficiencies are
measurable in the laboratory using long columns.
Table 5.1:
Sticking efficiencies measured for total traveled distances (from influent end of
the column) and segment sticking efficiency, measured for column segments
Distance from
Sticking efficiency over
Segment
Segment sticking efficiency
influent end of
thickness
total distance (
Α
L
)
(
Α
)
column
(m)
UCFL-94
UCFL-131
UCFL-94
UCFL-131
6.00
4.55E-03
7.62E-04
6.00
4.55E-03
7.62E-04
12.15
2.44E-03
4.47E-04
6.15
3.85E-04
1.42E-04
19.00
1.59E-03
3.00E-04
6.85
9.09E-05
3.99E-05
25.65
1.18E-03
2.26E-04
6.65
8.22E-06
1.55E-05
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