 | Crystal Right Systems (Iron and Manganese Removal)
Crystal Right works by an ion exchange process which removes iron, manganese and hardness. The minimum pH requirement is 6. Ammonia, lead, hydrogen sulphide and copper can also be reduced. The regeneration process is exactly the same as that used in a water softener and requires regeneration with salt (sodium chloride) There are two types of Crystal Right. CR100 is used where the pH is between 6 and 7 and will increase the pH. CR200 is used where the pH is 7 or above. Crystal Right has a number of advantages over conventional systems in that pH correction, iron/manganese removal and softening can all be addressed in a single process and at lower pHs. Consult the specification sheet for water quality conditions. |
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 | Birm (Iron & Manganese Removal) Systems
Birm is a relatively inexpensive material which can be used for iron and manganese removal by oxidation. It requires a pH of 7 or more for Iron removal and pH 8 for manganese removal (it uses dissolved oxygen in the water to oxidise the metal). As it acts a catalyst it is not consumed so Birm doesn t require regenerating or topping up. Birm also has the advantage of acting as a filter, removing turbidity. If the pH of the water is too low pH correction may be required. |
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 | Arsenic Reduction System
Arsenic is found naturally in many parts of the UK and Ireland and with the lowering of the European drinking water standards for arsenic it's removal is vital. The contaminated water passes through robust granular Bayoxide media developed for Severn Trent Water. As the water travels through the media the arsenic is absorbed and removed to a level below the drinking water standard. This treatment is a very cost effective way of removing arsenic. |
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 | pH Neutralisation Systems (To increase pH)
Water with a pH below 7 is acidic and corrosive. Raising the pH will neutralise the water, removing the metalic taste and can also reduce any iron or manganese contamination. The simplest way to raise the pH of water is to pass the water through a vessel containing slowly dissolving calcium and magnesium salts. The water can be manual in/out head or through an automatic backwashing filter head. The backwashing head has the advantage of remixing the media and also removing any debris or iron or manganese which may have been oxidised out of solution as the pH increases. Systems listed in this section are for the vessel, media, automatic backwashing filter valve and all fittings. |
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 | Hydrogen Sulphide Filters
Hydrogen sulphide (H2S) is a gas which if dissolved in water smells like rotten eggs. The easiest way to remove the smell is to pass the water through carbon where the H2S is adsorbed on to the carbon. In conventional carbon filters the carbon gets saturated and regularly needs replacing. In this novel system the H2S is sprayed through a layer of air held in the top of the vessel oxidising the gas vastly improving the capacity of the carbon reducing the need and cost of replacement carbon. |
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 | Sediment Filters (Sand and/or Filter Ag)
Sediment filters are needed when the water supply is cloudy or turbid. The easiest way to remove the particles is by passing the water through a media where the particles get stuck allowing clear water to flow through. The particles can be periodically backwashed away to drain. Sand is the ideal media for this. Only the highest quality, triple washed 0.5 to 1.0mm size water treatment grade sand is used in these systems. Filter Ag/Filter Ag+ or AFM can also be supplied which will give a better filtration at a slighltly higher cost. |
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 | Nitrate Reduction System
High levels of nitrates in water are dangerous (legal limit in potable water is 50mg/l). A nitrate reduction system is made up of a high quality vessel filled with nitrate selective resin with a multi-port valve on the top. As the water passes through the resin the nitrate is trapped. Periodically this nitrate needs to be removed by regenerating with salt. As the nitrate levels vary from month to month a time based regeneration system is recommended. Smaller systems can be cabinet based, larger ones come with a seperate brine tank to hold the salt. |
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 | Carbon Filters (Chlorine, Organics and colour Removal)
Granular activated carbon (GAC) adsorbs chlorine, organics and colour (tannins). Water passing through GAC will be stripped of the Cl/organics/colour. Eventually the carbon gets exhausted and needs to be replaced. Chlorine removal needs a contact time of 5min. For large colour removal systems ion exchange media maybe better - ask for details. |
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