Iron Zapper - Systems Technical Brochure

Product Information IRON ZAPPER® filter media from Safeway Water IRON ZAPPER media is a high rate, granular filter material used for removing Hydrogen Sulfide, Iron and Manganese compounds from water supplies. The media operates both as a filter working with an oxidant and as a catalytic media due to its ability to accelerate the reaction between the oxidizing agent and any prevalent dissolved Oxygen with Sulfide, Iron and Manganese present. Dissolved iron, Manganese and Hydrogen Sulfide will stay in solution unless the equilibrium is changed. Iron and Manganese that is not oxidized become catalytically precipitated and then adsorbed directly on the media. The media is a very dense media that stops oxidized (precipitated) forms of Iron, Manganese and Hydrogen Sulfide from passing through the bed. Most of the Manganese is rapidly removed in the first few inches of the media where it is further oxidized to Manganese Dioxide. The adsorbed Manganese, Iron and precipitated Sulfur are expelled during backwash. Any insoluble ferric hydroxide particulate growths are also expelled during backwash. The media must be properly backwashed to break loose and remove the filtered contaminants and precipitated Iron, Manganese and Hydrogen Sulfide. (Every day is typical). System sizing of the control valve and tank are necessary to sustain media performance. A continuous reaction occurs with the addition of an oxidant, regenerating the media surface and replenishing the media. For difficult applications, IRON ZAPPER filters can be enhanced with aeration, chlorination, and ozone. IRON ZAPPER filters are recommended before softeners to protect the ion exchange resin from fouling. Advantages Efficient reduction of manganese, iron and hydrogen sulfide with long service life Only regular backwashing is necessary (typically daily) Ability to process high flow rates with low pressure drop Converts ferrous iron to ferric iron Converts H2S to Sulfur Converts Manganese to MnO2 No chemical regeneration is required but may reduce service life NSF/ANSI Standard 61-2002 Certified Requirements Service flow rate – 6 GPM / cu. ft. Backwash flow rate – 15 GPM or more per square feet of media Bed depth – 24” minimum Freeboard – 70% of media depth pH range – 6.0 – 9.0 Applications: Removal of Iron up to 15 ppm Removal of Manganese up to 3 ppm Removal of Hydrogen Sulfide (rotten egg smell) up to 7 ppm Note: Not recommended for Iron Bacteria and Manganese bacteria removal. Not recommended for tannin and organics, ORP requirements The IRON ZAPPER media acts as a catalyst to use the Oxygen content of the water for oxidation. Using an ORP Meter, any reading above a negative 170 millivolts indicates Manganese Dioxide can be used effectively without the use of additional oxidants in most applications. Any reading below indicates oxidants will be required. Air Draw for additional oxidation For improved performance, the Safeway Water electronic control valve can be programmed for “air draw” to introduce ambient air to the filter’s pressure tank for greater oxidation and improved removal performance.