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Benefits of Using UV Water Purification Systems

Jun. 29, 2021
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There are many benefits of using UV water purification systems, here are just a few:

 

No need to handle potentially dangerous chemicals (chlorine)

Virtually immediate disinfection (no contact tanks like chlorine)

Low power consumption environmentally friendly (no disinfection by-products)

No moving parts to wear out or replace UV does not change the taste or odour of the water

Lower equipment investment verses other disinfection options Simple maintenance (with proper pre-treatment).


Chemical vs. Physical Disinfection of Contaminated Water

Disinfection is defined as “The act of disinfecting, using specialized cleansing techniques that destroy or prevent growth of organisms capable of infection.”

Disinfection is a considered a 4-log reduction or equivalent to a 99.99% reduction

There are generally two methods specifically for the disinfection of water:

CHEMICAL Disinfection: chlorine, ozone, iodine, bromine

PHYSICAL Disinfection: UV light, boiling, fine filtration

UVC Water Purification and Disinfection Machine

 UVC Water Purification and Disinfection Machine

Chemical Water Disinfection 

If using chemical disinfection a chemical must be added in order to destroy the microorganisms present

One method of chemical disinfection that we are most aware of is chlorination – specifically of our drinking water

How does chlorination work?

Using a chemical such as chlorine will not only target bacteria but it will also change the taste of the water, the smell, the pH as well as possibly form disinfection by-products (i.e. trihalomethanes).

 

Physical Water Disinfection

Physical disinfection does not require anything to be added to the water

This method of disinfection targets the microorganism only

Boiling, filtration, ultraviolet disinfection

When the contaminated water is boiled only the microorganisms are targeted killing them as the temperature increases

When the contaminated water is fine filtered specific microorganisms are removed depending on their size and the rating of the filter ted through DNA inactivation

Using any of the above physical methods will not change the taste, odour or chemical makeup of the water

One of the simplest and most effective ways to disinfect drinking water is by using UV disinfection

 

How Does UV Water Disinfection work?

In theory UV disinfection is a simple process. The 254nm energy coming from the UV lamp needs to reach the target microorganism in the water supply. However, many barriers affect UV performance. These include:

Suspended Solids, both visual and not visual particulate matter (turbidity).

Scale, fouling caused by physical scale deposits on the quartz sleeve from iron, manganese or calcium carbonate covering the quartz sleeve

UV Absorbing Compounds, UV absorption in water is almost entirely caused by dissolved substances. Certain organic substances such as humic or fumic acids (tannins), and certain inorganic substances such as iron and manganese absorb UV.

These contaminants MUST be addressed for UV Treatment to be effective

UV is NOT a stand-alone treatment process and is always accompanied by other water treatment processes

 


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