Copper-Silver Ionisation

Copper-Silver Ionisation is one of the most environmentally responsible approaches to water disinfection next to UV.

Both copper and silver have been used for their disinfection properties for centuries. The vikings used copper strings to prevent bacterial growth on the hull of their ships and NASA have used it to disinfect drinking water on spaceships since 1960.


Copper-silver ionization is brought about by electrolysis. An electric current is passed through copper and silver electrodes causing positively charged copper and silver ions to form. The electrodes are placed close together and the water that is to be disinfected flows past the electrodes. The larger part of the ions flows away through the water, before reaching the opposite electrode. Generally the amount of silver ions at a copper ion rate of 0,15 to 0,40 ppm lies between 5 and 50 ppb. The ion concentration is determined by the water flow. The number of ions that is released increases, when electric charges are higher. The deactivation rate of copper-silver ionization is lower than that of ozone or UV. Copper Silver treatment has a much longer residual effect than Ozone or UV which promotes long term disinfection and protects against recontamination.


Electrically charged copper ions (Cu2+) in the water search for particles of opposite polarity, such as bacteria, viruses and fungi.  Copper ions penetrate the cell wall and as a result they will create an entrance for silver ions (Ag+). These penetrate the core of the microorganism. Silver ions bond to various parts of the cell, such as the DNA and RNA, celular proteins and respiratory enzymes, causing all life support systems in the cell to be immobilized. As a result, there is no more celular growth or cell division, causing bacteria to no longer multiply and eventually die out. The ions remain active until they are absorbed by a microorganism.


Eliminates the need for chemical or thermal disinfection.

Residual effect ensures long term disinfection and reduiced re-contamination of systems.