The Doulton 4 Stage Ceramic Cartridge
Doulton Water Filter Ceramic Candle & Cartridge Technologies We want to take the mysteries out of the drinking water filtration. Ceramics, a natural water filter – Sterasyl micro-filter.
Doulton mines only the finest and purest kieselguhr or diatom earth often described as a silica-like sediment resulting from kiesel algae (one celled algae) deposited on the bottom of geological lakes and lagoons millions of years ago. This is the same material used in making the finest bone china (like of Royal Doulton) and numerous other applications.
The filter elements are produced using the latest ceramic techniques to provide a hollow
porous ceramic which is fired at a temperature in excess of 1000°C. The chemically inert ceramic filter can be stored for eternity without losing its effectiveness.
Doulton ceramic filter particles from the water but leaves oxygen and mineral contents unchanged, which gives water it’s spring-like freshness and wholesome taste. Pathogens of the most varied diseases which are reliably filtered from the water include; cholera, typhus, cryptosporidium, amoebic dysentery, ecoli, colibacillose or bilharzia, anthrax spores among others.
The porous structure of the filter allows the passage of water; particles and very small bacteria are held back at the filter surface. The result is clear, sterilized water.
Given favourable conditions, the accumulated bacteria could proliferate and grow unless prevented by some means.
To prevent this Doulton elements are manufactured with a small amount (about 0.07%) of pure silver (Ag) through-out the porous ceramic shell. Silver is a recognized bactericide, so when the bacteria comes into contact with the silver impregnated ceramic, their growth is inhibited. This self-sterilizing effect is known as the bacteriostatic effect .
Mechanical regeneration of the ceramic filter is simple. The topmost blocked layer can be removed with stiff brush or scouring pad (e.g. Scotch Brite®). This can be repeated many times before the filter has to be changed.