Catalyst filters
What is a catalyst filter?
A catalyst filter is a device in which a chemical reaction called oxidation takes place. By passing through a filter medium, i.e. a material that filters water, ions change from a soluble to an insoluble form. Thus, the ions no longer mix with the water and can be extracted more easily.
The device is usually used to oxidize iron, manganese or sulfur. By filtering these metals and minerals, it improves the color, taste or smell of the water. It can also reduce orange stains on plumbing fixtures or clothing.
For the oxidation reaction to be possible, certain water parameters must be considered:
- Its pH
- Its iron concentration in relation to its manganese concentration
- Its oxygen concentration
In most cases, the use of a catalyst filter also requires a pre-oxidation step, i.e. a step that precedes the oxidation reaction. Preoxidation actually allows the catalyst filter to do its job well.
Depending on the parameters of the water, this step involves adding either air or bleach to the water. This allows the catalyst filter to be regenerated, thus maximizing the oxidation process continuously.
The choice of the catalyst filter depends on the water parameters. Here are the main catalytic filters we use and their characteristics:
The catalyst filter BirmMD
- Removes iron and manganese.
- Works with a pH of 7 to 7.5 for iron and 8 to 8.5 for manganese.
- Requires pre-oxidation with air.
To do this, we install a venturi system to inject air into the water to increase its oxygen concentration and promote oxidation.
The Catalyst Filter CentaurMD
- Reduces sulphur in the water, and at the same time the smell of rotten eggs.
- Operates with a minimum pH of 6.5 to preserve the filter media.
- Requires less water when backwashing because it is very light.
- Usually requires pre-oxidation with air.
To do this, we install a venturi system to inject air into the water to increase its oxygen concentration and promote oxidation.
Green Sand Catalyst Filter GreensandPlusMD
- Removes iron, manganese and sulfur.
- Works with a minimum pH of 7 for iron and 8 for manganese.
- Is very efficient.
- Always requires pre-oxidation with sodium hypochlorite.
To do this, you must add bleach to the unit 3 to 4 times a year.
Installation : $
Maintenance : $
- Decolorize the water when there are tannins that give a tint to the water.
- Disinfect water when unwanted organisms are present.