Water Filtration

SCL Water recommends that a water sample is taken from your own private supply and analysed under laboratory conditions.

The geographical location will have a major bearing on depth, quantity and quality of supply. In any event the water can be analysed to establish contamination and to establish the filtration necessary to raise the quality of the water to the 2000 Drinking Water Standards. 

The simplified diagram below shows a typical filtration system to remove commonly found chemical contamination such as iron and manganese. It also shows inline ultra violet sterilisation (U/V) that destroys bacterial contaminants.

The filtration included in the logical schematic is as follows:

•   A sand and gravel filter that extracts iron found in suspension.
•   A Crystal Right unit that removes iron and manganese in solution and can raise the PH
•   A filter housing and sediment filter to remove particles.
•   An Ultra Violet (U/V) sterilisation unit to destroy any bacterial contamination 

The sand, gravel and crystalright units automatically self clean on a regular basis by the process of backwashing. 

SCL Water install a pressurised system that will protect your borehole pump from overloading. 

     Logical system schematic for a filtration system

Please see below specific methods for treating chemical or bacterial issues:

• Information on the removaladjustment of the levels of Hardness in the water
• The treatment for Bacterial contamination
• pH adjustment
• The treatment of taste and odour 
• The removal of minerals such as Iron and Manganese from water
  
  

What is hard water and how can water softeners help?   

Rainwater which falls on chalk and limestone dissolves and collects hardness minerals such as calcium and manganese. This water collects in underground aquifers before either naturally coming back to the surface as streams or being pumped via a borehole. The minerals naturally drop out of solution forming scale deposits, especially when the water is heated. In many applications this scale build up becomes unsightly or interferes with the efficiency of applications, and needs to be removed. Just 1.6mm of scale build up will cause a 12% loss in heating efficiency in boiler water. The systems we recommend reduce the levels of Calcium and Magnesium thus producing a softened water. A further benefit of the process is that the treated water reduces the excessive use of detergents and soaps.

Applications

• Domestic houses - Water to supply boilers
• Industrial/domestic hot water systems
• Pure Water pre-treatment (eg reverse osmosis).
• Food industry Electronics industry
• Window/car cleaning industry Chemical industry

For further information on water softeners please click on the picture above or on Water Softeners. Alternatively you can telephone us if you have any questions on the number at the foot of this page.

The treatment of Bacterial Contamination by Ultra Violet (U/V) sterilisation

UV is a useful disinfection method of removing micro-organisms from water to make it safe to use. It gets rid of bacteria and other micro-organisms by irradiation at 254 nm wavelength which penetrates the cell membrane and stops the cell from replicating. It eliminates the risk of overdosing using chemicals or leaving an unpleasant taste. UV sterilizers are low maintenance and are cheap to run. This fast method uses a lamp as the source of UV, surrounded by an air tight quartz sleeve, so the water passes over the lamp and removes any microorganisms present in the water.

pH Correction        

Water in which the pH is below 7 is acidic. Acidic water accelerates corrosion in pipe work, causes staining of baths, sinks and other appliances and can leave a distinctive ‘metallic’ taste to the water. Juraperle (calcium carbonate) is commonly used to raise the pH of water. Corosex is a magnesium based salt which is stronger than juraperle and used as a mix or when the pH is very low.

The removal of unpleasant taste and odour in water.

Granular Activated Carbon  (GAC) filters are an excellent choice for removal of chlorine, taste and odour, or organics in water. There are many different variations but most are either coconut coal or wood based.

Iron and Manganese treatment

Crystal Right works by an ion exchange process which removes iron, manganese and hardness. The minimum pH requirement is 6.0 and Crystal Right will raise the pH in these acidic waters. Crystal Right works at its best on clear water, i.e. when the iron/manganese are in a dissolved form. Crystal Right will also remove hardness with no extra treatment. Ammonia can also be reduced. The media bed can be sanitised with chlorine from time to time. 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.

Please do not hesitate to telephone us as we are happy to discuss your requirements with you. 

FREEPHONE (UK Only): 08000 748132  FROM ABROAD: 00 44 1769 575990