Sterilisation & Disinfection

Killing or removing microorganisms such as bacteria, parasites and viruses from a body of water.

What is UV Sterilisation

Sterilisation or disinfection is the process of killing or removing microorganisms such as bacteria, parasites and viruses from a body of water. This is done chemically or by passing the water through UV light.

Ultra Violet sterilisation utilizes UV light of strength more than 300J/m2 which, when passing through water, damages the DNA and nuclei of any bacteria, parasite and virus, thus negating and removing their ability to actively replicate as pathogens and cause illness and gastro problems.

Ultra Violet light is widely used as an effective non-chemical process to sterilise water.


AWS offers UV sterilisation units for domestic and commercial use. We offer units to suit varied requirements:

  • Domestic/Commercial standard units – Plug and Plays
  • Custom built skid mounted units

All our UV Water Treatment units include pre-treatment to remove any sediments/particulates in the source water prior to passing through the UV light. If these impurities are not removed, they can cause ‘shadowing’ and the bacteria can hide and not be reached by the UV rays to be neutralised.

What is Chemical Disinfection

Disinfection involves dosing the water chemically to kill bacteria, parasites and viruses present in the water. The use of chemical allows dose rates to be such that residual levels of chemicals dosed provide effective disinfection of the water.

Chlorine is a highly effective way of disinfection. Liquid chlorine, chlorine dioxide or chlorine gas are the common forms of chemical used for this.

AWS chlorinates using sodium hypochlorite in a chlorine loop with an analyser or chlorine dioxide, calcium hypochlorite granules and tablets.