KDF Lab Test Results from Biological Research Solutions
Laboratory Service Performed: Analysis of the mode
of action of KDF versus Pseudomonas fluorescens.
Table 1- Testing
Protocol
Sample
# |
Bacterial
Injector |
KDF
Column |
Description of Purpose |
1 |
Off |
Off |
Control: |
Measure survival of Ps. fluorescens in water that has passed through
the system KDF off by inoculating after collection. |
2 |
Off |
On |
KDF
Elution: |
Measure survival in water that has passed through KDF by inoculating
after collection. |
3 |
On |
Off |
Control: |
Measure survival of Ps. fluorescens that have been injected into the
system with KDF off. |
4 |
On |
On |
KDF
Contact: |
Measure survival of Ps. fluorescens that have come in direct contact
with KDF. |
All water used for testing was deionized and injected with AOAC
synthetic hard water to a final concentration of 100 ppm and a pH 7.0
+/-.2
Following collection, the samples were surface plated on Plate Count
Agar within 2 to 3 minutes of collection and again after incubation at
room temperature for 3 hours.
The same inoculums of Pseudomonas fluorescens was used for injection
in to Samples 3 and 4 or for addition to Samples 1 and 2 (added after
collection of the water).
Table 2 - KDF
Testing Results.
Experiment #
(Date) |
Sample #* |
Time
0 |
Time
3 hours |
I: 7-18-90 |
1 |
900 |
740 |
|
2 |
810 |
650 |
|
3 |
440 |
570 |
|
4 |
4 |
0 |
II: 7-19-00 |
1 |
1800 |
1600 |
|
2 |
1800 |
30 |
|
3 |
2100 |
1900 |
|
4 |
350 |
33 |
III: 7-21-90 |
1 |
580 |
460 |
|
2 |
580 |
31 |
|
3 |
650 |
330 |
|
4 |
390 |
0 |
IV: 7-23-90 |
1 |
740 |
630 |
|
2 |
740 |
180 |
|
3 |
770 |
470 |
|
4 |
360 |
42 |
Average: |
1 |
1000 |
830 |
|
2 |
30 |
220 |
|
3 |
990 |
820 |
|
4 |
280 |
19 |
* Sample numbers are described in Table 1.
Table 3 - Chlorine
removal by KDF.
Pump Rate
Pulse per Minute |
Calculated ppm
Free Chlorine |
Measured ppm
(KDF Off) |
Measured ppm
KDF (On) |
10 |
1.8 |
1.6 |
Less than .1 |
40 |
7.4 |
6.0 |
0.5 |
80 |
14.0 |
14.0 |
1.5 |
120 |
21.0 |
20.0 |
2.5 |
|