KDF Fluid Treatment - 30 Years of Water TreatmentBacteria Lab Test Results One KDF Lab Test Results from Biological Research Solutions

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Lab tests show how KDF Process Media work in bacteria removal from water.

Lab Test Results Show How KDF Process Media Work in Water Treatment Processing for Bacteria Removal


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