Getting Back to Basics: What are UV Systems

UV treatment systems are designed to destroy the DNA of bacteria present in water and to make it safe for drinking.

Ultra-violet treatment systems, also called UV sterilisers, destroy the DNA in unwanted bacteria in water meaning they do not grow or reproduce and are often used to purify drinking water in wells, boreholes and from springs in order to ensure it is safe to drink. They are also commonly used in the food and drink manufacturing industries as health and safety legislation has tightened over the years.

We are surrounded by micro-organisms of all kinds including bacteria, algae, viruses and parasites – and indeed, many of these invisible organisms live within our own digestive tracts and help to keep us healthy!

However, although most are harmless, or even beneficial in the right context, exposure to unwanted micro-organisms can cause serious illness in those with compromised immune systems, including the elderly, young infants and people with an immunocompromised illnesses.

Killing hidden dangers

There are many treatment products on the market which can help to improve the taste and look of water, but these are not designed to tackle hidden bacteria. One of the safest and easiest ways to disinfect water to make it safe to drink is with ultra-violet treatment system. UV rays are naturally present in sunlight which means that no chemicals need to be added to purify the water. This removes the risk of incorrect chemical dosing or the creation of unwanted aftertastes.

Considerations for system choice

There are UV water purification systems available for domestic and industrial usage, depending on needs.

Domestic systems are popular where the water comes from a private source or where there are known issues with bacterial contaminants. The important thing is to choose a model that will be able to deal with the necessary water flow. If the water flow is more rapid than the system is designed to treat, then it will pass through the system too quickly for all the bacteria to be treated. Another important factor is the sediment level of the water. If this is high, or if the water is naturally cloudy, then a pre-filter will need to be added so that particle shadows don’t affect the UV rays from treating the bacteria.

UV water purification for commercial uses use the same technology, but with systems designed to handle higher water flow rates and to operate in line with stringent EU legislation. The systems may also be combined with other methods of water purification and treatment depending on the application and circumstances.