---
title: "Laboratory Results: Bacteria Reduction with KDF® Process Media (Study 2)"
description: View bacteria lab test results for KDF® Process Media, including test methodology, performance outcomes, and what the data means for water treatment applications.
image: https://kdf.kymerainternational.com/hubfs/Figure%201%20-%20Model%20Water%20Test%20System.png
---

# **Bacteria Lab Test Results (Study 2) for KDF® Process Media**

A summary of the lab methodology, measured outcomes, and key takeaways   
for bacteria control in water treatment systems from Biological Research Solutions

 

#### 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.**  
**

![Chemist holding up beaker of green chemical in the laboratory](https://kdf.kymerainternational.com/hs-fs/hubfs/Chemist%20holding%20up%20beaker%20of%20green%20chemical%20in%20the%20laboratory.jpeg?width=1000&height=667&name=Chemist%20holding%20up%20beaker%20of%20green%20chemical%20in%20the%20laboratory.jpeg)

**Table 1** - Description of Test Procedure

- Test Microorganism: enterobacter aero genes
- Concentration of test Microorganism: 300cfu/ml
- Flow Rate: 1.0-1.5 liters per minute
- Water Hardness: 100ppm

| Test | Backwash | Purge | Bacteria Injected | Survivor Measurements |
| --- | --- | --- | --- | --- |
| 1 | None | None | Yes | Every 10 liters for 100 liter total flow |
| 2-6 | None | None | Yes | Every 10 liters for 20 liter total flow |
| 7 | 15 min | 10 min | Yes | After 10 liter flow |
| 11 | None | None | No | Every 10 liters for 20 liter total flow |
| 19 | 15 min | 10 min | No | Every 10 liters for 20 liter total flow |

| Total Water Flow (l) | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Enterobacter Aerogenes Survivors (cfu/ml) |  |  |  |  |  |  |  |  |  |  |
| Day 1 | 6 | 4 | 5 | 5 | 2 | 3 | 6 | 5 | 8 | 8 |
| Day 2 | 6 | 10 | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 3 | 4 | 4 | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 4 | 24 | 7 | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 5 | 1 | 0 | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 6 | 0 | 2 | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 7 | 2 | ? | ? | ? | ? | ? | ? | ? | ? | ? |
| Total Water Flow (l) | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Reduction in Endogenous Bacteria (%) |  |  |  |  |  |  |  |  |  |  |
| Day 11 | 80% | 73% | ? | ? | ? | ? | ? | ? | ? | ? |
| Day 19 | 59% | 30% | ? | ? | ? | ? | ? | ? | ? | ? |

###### No Enterobacter aerogenes survivors were detectable on Day 11 or 19.

### Figure 1 - Model Water Test System

 

**Submitted by Biological Research Solutions **

John W. Wireman, PhD, Dated: February 25, 1991

![Figure 1 - Model Water Test System](https://kdf.kymerainternational.com/hs-fs/hubfs/Figure%201%20-%20Model%20Water%20Test%20System.png?width=342&height=246&name=Figure%201%20-%20Model%20Water%20Test%20System.png)

![Reduction Oxidation Media is Tested and Certified by NSF International against NSF/ANSI Standard 42](https://kdf.kymerainternational.com/hs-fs/hubfs/Clean-kymera-D24/NSF_International_logo.svg.png?width=150&height=150&name=NSF_International_logo.svg.png)

This Reduction Oxidation Media is Tested and Certified by NSF International against NSF/ANSI Standard 42 for material requirements only.

![ Reduction Oxidation Media is Tested and Certified by NSF International against NSF/ANSI Standard 61 ](https://kdf.kymerainternational.com/hs-fs/hubfs/Clean-kymera-D24/NSF_International_logo.svg.png?width=150&height=150&name=NSF_International_logo.svg.png)

This Reduction Oxidation Media is Tested and Certified by NSF International against NSF/ANSI Standard 61 for material requirements only.

![Water Quality Association Member](https://kdf.kymerainternational.com/hs-fs/hubfs/Imported%20sitepage%20images/GoldSealBW.jpg?width=150&height=150&name=GoldSealBW.jpg)

Water Quality Association   
Member