Sam Ziemann From - Region of Waterloo

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MD-80 CATALYTIC MEDIAIRON, MANGANESE, ARSENIC AND HYDROGEN SULFIDE REMOVALPRODUCT OVERVIEWMD-80 by Napier-Reid Limited is a high-performance catalytic oxidative media. The media isused in water treatment applications for iron, manganese and hydrogen sulfide removal. It isalso used in removal of other heavy metals such as lead and arsenic. It is a media that utilizesan oxidation, adsorption and filtration process similar to greensand and Birm, but at a muchhigher level of performance and capacity.Because of MD-80 media’s high content of manganese dioxide (MnO2) it provides a highercatalysis and adsorption capability than other media. Manganese dioxide works as a catalystto accelerate the oxidation reaction between the oxidants (dissolved oxygen or other oxidantsinjected) and the soluble iron, manganese and sulfide. The oxidized form will precipitate andthen be filtered out by the media bed. Iron and manganese that are not oxidized becomecatalytically precipitated and adsorbed on the media .The adsorbed iron, manganese are expelled during backwash. Any trapped solid form of iron,manganese and sulfur particles are also flushed out of the filter during backwash cycle. It isvery important to make sure that the media receives a thorough backwash to break loose andremove the contaminant particles and keep the bed clean to maintain its high capacity. Toensure a good performance daily backwash is recommended. Air scour will help theregeneration of the MD-80 media especially when there is no continuous addition of oxidants.Although MD-80 can be used without chemicals for most low-level contaminants the additionof oxidants, such as chlorine, ozone, hydrogen peroxide and potassium permanganate greatlyenhances the performance and extends the service life of the MD-80 media.MD-80 outperforms most of other media for iron, manganese and sulfide removal. It is alsorecommended as a pre-treatment step for ion-exchange softener, RO system and GACcontactor.If there is presence of arsenic and iron in the raw water, iron will be oxidized to iron oxide andarsenic will be adsorbed onto iron oxide and removed from the water together with iron. Thiscan either be a stand-alone process or as a pre-treatment step prior to other arsenic removalprocess based on adsorption principle to prolong the service life of the adsorption media.Ferric chloride solution can be added to increase the iron to arsenic ratio if necessary.MD-80 is capable of removing virtually unlimited amounts of the above contaminants, buttends to work better in some geographic areas than others depending on the levels of TDS orHeme Iron (organics) in the local water supplies. If you have had success in the past withgreensand, Birm®, Pyrolox, or Filox-R, then MD-80 will work for you using the sameparameters.10 Alden Road, Unit 2Markham, Ontario L3R 2S1, CanadaTel: (905) 475-1545 1-800-615-4406 Fax: (905) 475-2021E-mail: info@napier-reid.com / Website: www.napier-reid.com
TECHNICAL SPECIFICATIONSPHYSICAL PROPERTIESColour:Grey - BlackActive Ingredients: 75% - 85%Physical Form: GranularMesh Size: 20 x 40Bulk Density: 110 lbs / ft 3Specific Gravity: 4Taste and Odour: NoneLife Expectancy: Virtually unlimited forlow contaminantconditionsSHIPPING INFOMATIONPackaging:Pallets:Heavy-duty paper bag.55 or 1100 lbs per bag.40 Bags/Pallet.2300 lbs per palletOPERATING CONDITIONSService Flow Rate: 5 – 10 gpm/ft 2Freeboard: 30% - 40%Backwash Rate: 20 – 25 gpm/ft 2@ 60°FBed Depth: 20” to 35”Terminal Headloss: 10 psi Max.Backwash Frequency: 24 – 48 hrsPH Range: 5.0 – 9.0CERTIFICATIONThe MD-80 media is certifiedto NSF/ANSI Standard 61 andis suitable for potable waterapplications.SERVICE FLOW PRESSURE DROPBACKWASH BED EXPANSION10 Alden Road, Unit 2Markham, Ontario L3R 2S1, CanadaTel: (905) 475-1545 1-800-615-4406 Fax: (905) 475-2021E-mail: info@napier-reid.com / Website: www.napier-reid.com
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Sam Ziemann From - Region of Waterloo

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