What is Birm?
Birm stands for “Burgess Iron Removal Method” created by Clark Corporation as an efficient and economical method of filtering impurities like iron and manganese from tap water. The process of producing Birm is a result of impregnating Manganous salts to a core composed of Aluminum Silicate.
Birm is a black, granular iron and manganese filter media applied in either a pressurized or gravity-fed water purification method. It improves the reaction between dissolved oxygen (DO) and the iron compounds by acting as an insoluble catalyst.
How Does Birm Work?
Since filters can’t remove both iron and manganese, most modern water filtration systems use Birm filter media to eliminate these minerals from the water. A reaction occurs in the filter tank containing the Birm media where insoluble ferric hydroxide forms and gets trapped into the filter media. The reaction between the dissolved oxygen and the iron compounds creates rust and iron particles that get stuck to Birm. With regular backwashing, these oxidized impurities easily wash off from the media and exit the filter tank.
What are the Advantages of Birm?
The best thing about Birm filter media is you don’t need any chemical to maintain its effectiveness and efficiency. With proper care and handling, you can enjoy the filter for a long time. Another benefit of using Birm in your water filtration system is its high efficiency in removing iron from tap water. Since a periodic backwash is enough to keep the media in top condition, it is a cost-effective investment because it does not require replacements of filter media.
What are the Conditions for Operation?
The tap water must have a pH level of 7.0 to 9.0 to get the best result. If you’re using deep well deeper than 50 feet as the water source, it is highly recommended to use an air injector for additional oxygen before the Birm filter media. Other sources of water do not require the use of air injectors. Dissolved oxygen (DO) must not be below 15% of the iron and manganese present in the water.
What are the Influent and Backwash Limitations?
It is crucial to use a carbon filter before the iron filter media because the application of Birm in water with a chlorine residual is a big NO. If the water smells like a rotten egg, it is a sign of the presence of Hydrogen Sulfide in the water source. Removing the contaminant is a priority before using the iron filter media. The best thing about Birm media is it needs little maintenance when you are operating within its required conditions.
When Should You Replace the Filter Media?
When working under the right conditions, the filter media may last up to 8 years. If usage is minimal, it may last more than ten years. However, you can change the filter media sooner than later if you feel that it loses its efficiency in removing the chemical elements.