Ultraviolet Water Disinfection

Posted by Josie 20/07/2016 0 Comment(s) Water Treatment Filters,

Ultraviolet Water Disinfection UV Filter

Ultraviolet Water Disinfection for Private Water Supplies


If you have a private water supply, then we would recommend having a UV Filter (Ultraviolet Water Disinfection System) installed. 


What is Ultraviolet Water Disinfection?


The actual term is “Ultraviolet Germicidal Irradiation” it basically is a method of treatment via a UV filter that uses shortwave ultraviolet light, which destroys and inactivates microorganisms found in private water supplies from from wells, boreholes or streams.  By destroying the genetic structure of these microorganisms they are rendered harmless and unable to multiply, thereby making the water safer to drink. 


There are 5 types of microorganism namely: bacteria, viruses, fungi, protozoa and algae. These microorganisms are so small that they can only be seen through a microscope.  The Daro UV filters we supply and install are effective at destroying these microorganisms. 


However, as with all water treatment filters they do require annual maintenance cleaning the internal quartz sleeve, replacing the germicidal UV lamps and sediment pre-filter cartridges.  Failing to carry out this essential service will simply mean that the UV filter is consuming energy and not effectively treating the water supply, resulting in contaminated water making its way through and into the water distribution system.


The real benefit of UV treatment is that it does not rely on chlorine and therefore does not alter the taste or impart that unpleasant odour associated with mains water supplies.  The use of chlorine as a disinfectant in drinking water unfortunately results in harmful by-products being produced, such as Trihalomethanes (THM’s).  There are four types of THM’s produced which are known to be Cancer Group B carcinogens and which are shown to cause cancer when tested on laboratory animals.


Does Ultraviolet Water Disinfection Remove Nitrates or other Contaminants?


No, in order to remove other harmful contaminants such as pesticides, herbicides, lead, heavy metals etc. you will require a Reverse Osmosis Filter (RO) after the UV filter.  The RO filter has a dedicated water tap where treated water is drawn off for drinking and cooking.  The RO filters are also excellent installed on mains water supplies to remove that unpleasant taste of chlorine, together with many other contaminants.


Do I need an RO if I have mains water?


If finances permit, then yes it would be the best option.  For mains water supplies the real problem is the unpleasant taste and odour of chlorine.  An alternative and less expensive method is to install a single point-of-use carbon filter on the cold kitchen drinking water supply.  The carbon cartridge will require replacement at 6 month intervals and it is very simple to carry out this exchange yourselves.

If you have a domestic or commercial water quality problem, be it from a well, borehole, stream or mains supply and need further help, then contact us for friendly expert advise.


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