Shopping Cart Items: 0   Sub-Total : US$0.00
Welcome, Guest ( Login )
Celebrating 33 years providing high quality products and advice.
Our Local Time Is 11:23:50 AM.
Call us at 818-786-0600. We are here to help!
Lab Water System ON SALE NOW
Introducing the Polaris Lab Water Systems
High Purity Water Made In The USA.
Click here for more info.
Laboratory Water Systems Laboratory Process Filters Laboratory Equipment Water Treatment

APS TechNotes See all articles

Birm Water Filtration Media for Removing Iron and Manganese

Also See :

  • Brim filtration media.
  • Terminator Birm Water System and Airation Systems

    Birm is an efficient and economical media for the reduction of dissolved iron and manganese compounds from raw water supplies. It may be used in either gravity fed or pressurized water treatment systems.

    Birm acts as an insoluble catalyst to enhance the reaction between dissolved oxygen (D.O.) and the iron compounds. In ground waters the dissolved iron is usually in the ferrous bicarbonate state due to the excess of free carbon dioxide and is not filterable. Birm, acting as a catalyst between the oxygen and the soluble iron compounds, enhances the oxidation reaction of iron and produces ferric hydroxide which makes the iron combine into sediment particles and may be easily filtered.

    The physical characteristics of Birm provide an excellent filter media which is easily cleaned by backwashing to remove the precipitant. Birm is not consumed in the iron removal operation and therefore offers a tremendous economic advantage over many other iron removal methods.

    Other advantages of Birm include:

  • long material life with relatively low attrition loss
  • A wide temperature performance range and extremely high removal efficiency.

    Negligible labor costs are involved because Birm does not require chemicals for regeneration, only periodic backwashing is required.

    When using Birm for iron removal, it is necessary that the water:

  • Contain no oil or hydrogen sulfide
  • organic matter not to exceed 4-5 ppm
  • The Dissolved Oxygen content equal at least 15% of the Iron content
  • A pH of 6.8 or more.

    If the influent water has a pH of less that 6.8, neutralizing additives such as Clack Corosex, Calcite or soda ash may be used prior to the Birm filter to raise the pH. A water having a low D.O. level may be pretreated by aeration.

    Additions of chemicals to influent or backwash water which contacts Birm media may inhibit iron or manganese removal or may break down or coat Birm media. Chlorination greatly reduces Birms activity. High concentrations of chlorine compounds may deplete the catalytic coating.

    Polyphosphates are known to coat Birm and reduce Birms ability to remove iron or manganese. Before adding any chemical to the influent or backwash water, the chemical's compatibility with Birm should be thoroughly tested.

    Clack Birm may also be used for manganese reduction with the same dependability as iron removal. In these applications the water to be treated should have a pH of 8.0-9.0 for best results. If the water also contains iron, the pH should be below 8.5. High pH conditions may cause the formulation of colloidal iron which is very difficult to filter out. All other conditions remain the same for either manganese or iron removal.

    .
    ..
    ...





  • Open To The Public

    Why Use APS??

    Independent Reps Wanted

    Need Live Help?

    Contact Us
    818-786-0600

    Short Lead times.
    Lab Water Deionizer

    Best
    Lab Water System

    Top Sellers

    Most Popular
    Fume Hoods

    Images are representative of the products. Images may or may not be of the actual product. If it is important e-mail us for an actual image if available.

    * Flat Rate UPS shipping when able to ship via UPS and is in the USA excluding Hawaii and Alaska.
    Larger Items may not be able to ship via UPS, in that case freight charges will be quoted seperately.
    International shipping will be quoted after the order is placed. You will have the opportunity to cancel before we finalize your order.

    Terms and conditions
    Credit Application
    Privacy Policy
    List All Products