---
title: Industrial Chlorine Reduction in Municipal Water Using KDF® 55 (Case Study)
description: Explore a chlorine removal case study using KDF® 55 Process Media, including the treatment approach, key results, and benefits for industrial water use.
---

# Chlorine Removal Case Study with KDF® 55

A real-world example of reducing free chlorine in municipal water using KDF® 55, including the approach, results, and implementation notes.

 

 

### KDF® 55 Process Medium Helps with Chlorine Removal in a Municipal Water Treatment Facility

*A Los Angeles-based maker of fashion jeans uses KDF® media instead of chemicals for removing chlorine when treating municipal water in their stone-washing process.*

High-purity copper-zinc redox water filter media consistently provides 99% of free chlorine removal from water by electrochemically reducing dissolved chlorine gas to water-soluble chloride ions. ([More information on how KDF® 55 process medium work.](https://kdf.kymerainternational.com/products?hsLang=en))

![denim jean close up](https://kdf.kymerainternational.com/hubfs/bigstock-Blue-jeans-pocket--55169885.jpg)

- National clinical laboratory used KDF® 55 Medium as a pretreatment to reverse osmosis membranes for high-purity. System has been in operation for 9 years at 6,000 gallons per day.
- Northeastern U.S. commercial laundry facility uses KDF® 55 Process Medium as a pretreatment to ion exchange resins at 200 gpm (gallons per minute). The switch from granular activated carbon (GAC) represented a major cost savings for the company.
- Major U.S. blue jean manufacturer uses KDF® 55 Medium for pretreatment to ion exchange systems at 600 gpm; 175 gpm also used for reclaiming plant's waste stream from production.
- KDF® Process Medium are being used to complement or replace activated carbon filters, removing up to 95% of the chlorine when treating municipal water. KDF® Media pretreatment of granular activated carbon also extends the carbon's life and limits bacteria growth in the bed.

 

A typical chlorine redox reaction with KDF® Process Media

##### Cu/Zno + HOCl⇒ Zn+++ CI- + OH-

![NSF_International_logo](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.

![NSF_International_logo](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